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Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydrualic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1995-01-01T23:59:59.000Z

2

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydraulic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control. 10 figs.

Cikanek, S.R.

1995-09-12T23:59:59.000Z

3

Fuzzy logic electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An regenerative antiskid braking and traction control system using fuzzy logic for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensor and determining if regenerative antiskid braking control, requiring hydraulic braking control, and requiring traction control are required. The processor then employs fuzzy logic based on the determined vehicle state and provides command signals to a motor controller to control operation of the electric traction motor and to the brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative braking control, hydraulic braking control, and traction control. 123 figs.

Cikanek, S.R.

1994-10-25T23:59:59.000Z

4

Fuzzy logic electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An regenerative antiskid braking and traction control system using fuzzy logic for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensor and determining if regenerative antiskid braking control, requiring hydraulic braking control, and requiring traction control are required. The processor then employs fuzzy logic based on the determined vehicle state and provides command signals to a motor controller to control operation of the electric traction motor and to the brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1994-01-01T23:59:59.000Z

5

The Research of Traction Motor Energy-Saving Regenerative Braking Control Technology  

Science Conference Proceedings (OSTI)

In all the motor braking control systems, regenerative braking is the only way of energy-saving braking control mode. It can convert dynamic energy which generate during braking period into electric energy, then return to the grid. In this paper, through ... Keywords: regenerative braking, traction motor, direct torque, stator flux, slip frequency

Yuhua Wang; Jianlin Miao; Yuanfang Wei

2010-05-01T23:59:59.000Z

6

Adaptive controller for regenerative and friction braking system  

DOE Patents (OSTI)

A regenerative and friction braking system for a vehicle having one or more roadwheels driven by an electric traction motor includes a driver responsive device for producing a brake demand signal having a magnitude corresponding to the level of braking force selected by the driver and friction and regenerative brakes operatively connected with the roadwheels of the vehicle. A system according to this invention further includes control means for operating the friction and regenerative braking subsystems so that maximum brake torques sustainable by the roadwheels of the vehicle without skidding or slipping will not be exceeded.

Davis, Roy I. (Ypsilanti, MI)

1990-01-01T23:59:59.000Z

7

Adaptive controller for regenerative and friction braking system  

DOE Patents (OSTI)

A regenerative and friction braking system for a vehicle having one or more road wheels driven by an electric traction motor includes a driver responsive device for producing a brake demand signal having a magnitude corresponding to the level of braking force selected by the driver and friction and regenerative brakes operatively connected with the road wheels of the vehicle. A system according to this invention further includes control means for operating the friction and regenerative braking subsystems so that maximum brake torques sustainable by the road wheels of the vehicle without skidding or slipping will not be exceeded. 8 figs.

Davis, R.I.

1990-10-16T23:59:59.000Z

8

Computational model design and performance estimation in registration brake control  

Science Conference Proceedings (OSTI)

Electric motorcycles are applicable to both toys and real motorcycles, and also is a reference for constructing larger electrical vehicles. A design computational model of regenerative braking control of electric motorcycles and an experimental identification ...

P. S. Pa; S. C. Chang

2009-06-01T23:59:59.000Z

9

Simulation of PSO Fuzzy Control Stratety for Regenerative Braking of HEV  

Science Conference Proceedings (OSTI)

Based on particle swarm optimization algorithm, a new fuzzy controller was constructed and a fuzzy control strategy of regenerative braking for HEV was proposed. A model of a parallel hybrid electric vehicle was built. The performance of the default ... Keywords: hybrid electric vehicle, fuzzy control, regenerative braking, particle swarm optimization

Wang Chun; Tang Lan

2012-04-01T23:59:59.000Z

10

Operation Pattern Recognition and Control for Super Capacitor Braking Energy Regeneration System of Micro EV  

Science Conference Proceedings (OSTI)

Super capacitor has some advantages of high charge-discharge rate, long life, simple structure and reliable performance, and it is especially suitable as braking energy renewable energy storage device for electric vehicle and hybrid electric vehicle. ... Keywords: Super capacitor, braking energy regeneration, micro EV, pattern recognition and control

Jinyu Qu; Liyan Liang; Zhongyu Yang

2009-12-01T23:59:59.000Z

11

Nonlinear Control Synthesis for a Self-energizing Electro-Hydraulic Brake  

E-Print Network (OSTI)

Nonlinear control algorithm for a self-energizing electro-hydraulic brake is analytically designed. The desired closed-loop system behavior is reached via a synthesized nonlinear controller.

Starykh, Alexey

2010-01-01T23:59:59.000Z

12

Braking system  

DOE Patents (OSTI)

A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling means causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

Norgren, D.U.

1982-09-23T23:59:59.000Z

13

Model and Simulation of a Super-capacitor Braking Energy Recovery System for Urban Railway Vehicles  

Science Conference Proceedings (OSTI)

In this paper, a braking energy recovery system based on super-capacitor was presented. The method use super-capacitor and the conventional braking resistance constitute a new braking unit to realize the regenerative energy recovery, when braking, braking ... Keywords: Urban railway transportation, regeneration braking, super-capacitor, energy recovery, electric traction

Chen Xiao-li; Yang Jian; Fang Yu

2010-08-01T23:59:59.000Z

14

Control of a dynamic brake to reduce turbine-generator shaft transient torques  

SciTech Connect

A resistive, thyristor-controlled brake is used to damp transient torques in large thermo-electric generators supplying series-compensated transmission lines. Emphasis is placed on developing a suitable control algorithm and testing the algorithm through a wide variety of different operating configurations. Discrete-level Generalized Predictive Control is examined as one possible approach to optimal control of the brake. Some problems with implementation of GPC on the system are discussed. Prony analysis is used to identify system transfer functions which are then related to control design considerations and robustness properties.

Donnelly, M.K.; Smith, J.R.; Johnson, R.M. (Montana State Univ., Bozeman, MT (United States)); Hauer, J.F. (Bonneville Power Administration, Kalispell, MT (United States)); Brush, R.W. (Montana Power Co., Butte, MT (United States)); Adapa, R. (Electric Power Research Inst., Palo Alto, CA (United States))

1993-02-01T23:59:59.000Z

15

Hybrid: Braking  

NLE Websites -- All DOE Office Websites (Extended Search)

button highlighted Stopped Button subbanner graphic: gray bar BRAKING: PART 1 Regenerative braking converts otherwise wasted energy from braking into electricity and stores it in...

16

Ac traction gets on track  

Science Conference Proceedings (OSTI)

This article describes inverter-based ac traction systems which give freight locomotives greater adhesion, pulling power, and braking capacity. In the 1940s, dc traction replaced the steam engine as a source of train propulsion, and it has ruled the freight transportation industry ever since. But now, high-performance ac-traction systems, with their unprecedented levels of pulling power and adhesion, are becoming increasingly common on America`s freight railroads. In thousands of miles of demonstration tests, today`s ac-traction systems have outperformed traditional dc-motor driven systems. Major railroad companies are convinced enough of the benefits of ac traction to have integrated it into their freight locomotives.

O`Connor, L.

1995-09-01T23:59:59.000Z

17

CityCarControl : an electric vehicle drive-by-wire solution for distributed steering, braking and throttle control  

E-Print Network (OSTI)

In this paper, we propose CityCarControl, a system to manage the steering, braking, and throttle of a new class of intra-city electric vehicles. These vehicles have a focus on extreme light-weight and a small parking ...

Brown, Thomas B., M. Eng. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

18

Combined hydraulic and regenerative braking system  

DOE Patents (OSTI)

A combined hydraulic and regenerative braking system and method for an electric vehicle is disclosed. The braking system is responsive to the applied hydraulic pressure in a brake line to control the braking of the vehicle to be completely hydraulic up to a first level of brake line pressure, to be partially hydraulic at a constant braking force and partially regenerative at a linearly increasing braking force from the first level of applied brake line pressure to a higher second level of brake line pressure, to be partially hydraulic at a linearly increasing braking force and partially regenerative at a linearly decreasing braking force from the second level of applied line pressure to a third and higher level of applied line pressure, and to be completely hydraulic at a linearly increasing braking force from the third level to all higher applied levels of line pressure.

Venkataperumal, R.R.; Mericle, G.E.

1979-08-09T23:59:59.000Z

19

Combined hydraulic and regenerative braking system  

DOE Patents (OSTI)

A combined hydraulic and regenerative braking system and method for an electric vehicle, with the braking system being responsive to the applied hydraulic pressure in a brake line to control the braking of the vehicle to be completely hydraulic up to a first level of brake line pressure, to be partially hydraulic at a constant braking force and partially regenerative at a linearly increasing braking force from the first level of applied brake line pressure to a higher second level of brake line pressure, to be partially hydraulic at a linearly increasing braking force and partially regenerative at a linearly decreasing braking force from the second level of applied line pressure to a third and higher level of applied line pressure, and to be completely hydraulic at a linearly increasing braking force from the third level to all higher applied levels of line pressure.

Venkataperumal, Rama R. (Troy, MI); Mericle, Gerald E. (Mount Clemens, MI)

1981-06-02T23:59:59.000Z

20

Electric vehicle regenerative antiskid braking and traction ...  

Patent Number: 5,450,324: Issued: September 12, 1995: Official Filing: View the Complete Patent at the US Patent & Trademark Office: Lab: Idaho ...

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Advanced Integrated Traction System  

DOE Green Energy (OSTI)

Besides the development of a high temperature ETS the development of industrial suppliers took place because of this project. Suppliers of industrial power electronic components are numerous, but there are few that have traction drive knowledge. This makes it difficult to achieve component reliability, durability, and cost requirements necessary of high volume automotive production. The commercialization of electric traction systems for automotive industry requires a strong diverse supplier base. Developing this supplier base is dependent on a close working relationship between the OEM and supplier so that appropriate component requirements can be developed. GM has worked closely with suppliers to develop components for electric traction systems. Components that have been the focus of this project are power modules, capacitors, heavy copper boards, current sensors, and gate drive and controller chip sets. Working with suppliers, detailed component specifications have been developed. Current, voltage, and operation environment during the vehicle drive cycle were evaluated to develop higher resolution/accurate component specifications.

Greg Smith; Charles Gough

2011-08-31T23:59:59.000Z

22

Gravity brake  

DOE Patents (OSTI)

A mechanical gravity brake that prevents hoisted loads within a shaft from free-falling when a loss of hoisting force occurs. A loss of hoist lifting force may occur in a number of situations, for example if a hoist cable were to break, the brakes were to fail on a winch, or the hoist mechanism itself were to fail. Under normal hoisting conditions, the gravity brake of the invention is subject to an upward lifting force from the hoist and a downward pulling force from a suspended load. If the lifting force should suddenly cease, the loss of differential forces on the gravity brake in free-fall is translated to extend a set of brakes against the walls of the shaft to stop the free fall descent of the gravity brake and attached load.

Lujan, Richard E. (Santa Fe, NM)

2001-01-01T23:59:59.000Z

23

Improved braking torque generation capacity of an eddy current brake with time varying magnetic fields: A numerical study  

Science Conference Proceedings (OSTI)

Eddy current brakes (ECB) are electrically controlled and non-contact actuators used as assistive brakes in vehicles. ECBs exhibit insufficient generated braking torque at low speeds. In order to overcome this, the use of AC magnetic fields with fixed ... Keywords: Automotive applications, Brake-by-wire, Eddy current brakes, Finite element analysis, Time-varying magnetic field

Kerem Karakoc; Edward J. Park; Afzal Suleman

2012-10-01T23:59:59.000Z

24

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

1 1 Regenerative braking converts otherwise wasted energy from braking into electricity and stores it in the battery. In regenerative braking, the electric motor is reversed so that, instead of using electricity to turn the wheels, the rotating wheels turn the motor and create electricity. Using energy from the wheels to turn the motor slows the vehicle down. Go to next… stage graphic: vertical blue rule Main stage: See through car with battery, engine, and electric motor visible. The car is decelerating. There are arrows flowing from the front wheels to the electric motor to the battery. Main stage: See through car with battery, engine, and electric motor visible. The car is decelerating. There are arrows flowing from the front wheels to the electric motor to the battery.

25

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

2 2 If additional stopping power is needed, conventional friction brakes (e.g., disc brakes) are also applied automatically. Go back… stage graphic: vertical blue rule Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Battery: The battery stores energy generated from the gasoline engine or, during regenerative braking, from the electric motor. Since the battery helps power the vehicle, it is larger and holds much more energy than batteries used to start conventional vehicles. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection.

26

The Application of Fuzzy Logic in Regenerative Braking of EV  

Science Conference Proceedings (OSTI)

Regenerative braking can improve energy usage efficiency and prolong the driving distance of electric vehicle per charge, effectively. In the paper, we design a sugenos fuzzy logic controller which has four inputs including drivers braking ... Keywords: regenerative braking, fuzzy logic control, braking force distribution, ADVISOR

Zijian Zhang; Guoqing Xu; Weimin Li; Liang Zheng

2010-08-01T23:59:59.000Z

27

Brake blending strategy for a hybrid vehicle  

DOE Patents (OSTI)

A hybrid electric powertrain system is provided including a transmission for driving a pair of wheels of a vehicle and a heat engine and an electric motor/generator coupled to the transmission. A friction brake system is provided for applying a braking torque to said vehicle. A controller unit generates control signals to the electric motor/generator and the friction brake system for controllably braking the vehicle in response to a drivers brake command. The controller unit determines and amount of regenerative torque available and compares this value to a determined amount of brake torque requested for determining the control signals to the electric motor/generator and the friction brake system.

Boberg, Evan S. (Hazel Park, MI)

2000-12-05T23:59:59.000Z

28

A preliminary assessment of asbestos awareness and control measures in brake and clutch repair services in Knoxville and Knox County, Tennessee  

SciTech Connect

The pending OSHA standard revision proposed in 1990 to lower the asbestos Permissible Exposure Limit (PEL) and to mandate effective asbestos control measures (ACM) in brake and clutch assembly work may have a profound effect on industries involved in such operations. Health protection of workers will be improved and costs of improved control methods and training will increase. Considering these facts, this preliminary study was designed to assess the level of worker and management awareness of asbestos hazards associated with brake and clutch repair and to determine what ACM had been implemented by businesses in Knoxville and Knox County, Tennessee. The study, in a metropolitan area of approximately 336,000 people, revealed eight different categories of businesses conducting brake and clutch repair work with an estimated 363 potentially exposed employees. Results of the study suggest that managers and employees of the 80 businesses studied were in need of asbestos hazard awareness training and more adequate asbestos control measures.

Phillips, C.C. (Oak Ridge National Lab., TN (United States)); Hamilton, C.B.

1994-04-01T23:59:59.000Z

29

Design of Electric Vehicles DC Traction Motor Drive System Based on Optimal Control  

Science Conference Proceedings (OSTI)

The traditional electric vehicle DC motor drive system can not automatically weaken magnetic field. This paper designs DC motor drive system which control optimally the motor to meet the requirement. The study results show that: the drive system can ... Keywords: electric vehicles, DC motor, controller, optimal control

Yan Jun

2012-12-01T23:59:59.000Z

30

Advanced Integrated Traction System  

SciTech Connect

The United States Department of Energy elaborates the compelling need for a commercialized competitively priced electric traction drive system to proliferate the acceptance of HEVs, PHEVs, and FCVs in the market. The desired end result is a technically and commercially verified integrated ETS (Electric Traction System) product design that can be manufactured and distributed through a broad network of competitive suppliers to all auto manufacturers. The objectives of this FCVT program are to develop advanced technologies for an integrated ETS capable of 55kW peak power for 18 seconds and 30kW of continuous power. Additionally, to accommodate a variety of automotive platforms the ETS design should be scalable to 120kW peak power for 18 seconds and 65kW of continuous power. The ETS (exclusive of the DC/DC Converter) is to cost no more than $660 (55kW at $12/kW) to produce in quantities of 100,000 units per year, should have a total weight less than 46kg, and have a volume less than 16 liters. The cost target for the optional Bi-Directional DC/DC Converter is $375. The goal is to achieve these targets with the use of engine coolant at a nominal temperature of 105C. The system efficiency should exceed 90% at 20% of rated torque over 10% to 100% of maximum speed. The nominal operating system voltage is to be 325V, with consideration for higher voltages. This project investigated a wide range of technologies, including ETS topologies, components, and interconnects. Each technology and its validity for automotive use were verified and then these technologies were integrated into a high temperature ETS design that would support a wide variety of applications (fuel cell, hybrids, electrics, and plug-ins). This ETS met all the DOE 2010 objectives of cost, weight, volume and efficiency, and the specific power and power density 2015 objectives. Additionally a bi-directional converter was developed that provides charging and electric power take-off which is the first step towards enabling a smart-grid application. GM under this work assessed 29 technologies; investigated 36 configurations/types power electronics and electric machines, filed 41 invention disclosures; and ensured technology compatibility with vehicle production. Besides the development of a high temperature ETS the development of industrial suppliers took place because of this project. Suppliers of industrial power electronic components are numerous, but there are few that have traction drive knowledge. This makes it difficult to achieve component reliability, durability, and cost requirements necessary of high volume automotive production. The commercialization of electric traction systems for automotive industry requires a strong diverse supplier base. Developing this supplier base is dependent on a close working relationship between the OEM and supplier so that appropriate component requirements can be developed. GM has worked closely with suppliers to develop components for electric traction systems. Components that have been the focus of this project are power modules, capacitors, heavy copper boards, current sensors, and gate drive and controller chip sets. Working with suppliers, detailed component specifications have been developed. Current, voltage, and operation environment during the vehicle drive cycle were evaluated to develop higher resolution/accurate component specifications.

Greg Smith; Charles Gough

2011-08-31T23:59:59.000Z

31

Variable ratio regenerative braking device  

DOE Patents (OSTI)

Disclosed is a regenerative braking device (10) for an automotive vehicle. The device includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (36) and an output shaft (42), clutches (38, 46) and brakes (40, 48) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. The rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft is clutched to the transmission while the brake on the output shaft is applied, and are torsionally relaxed to deliver energy to the vehicle when the output shaft is clutched to the transmission while the brake on the input shaft is applied. The transmission ratio is varied to control the rate of energy accumulation and delivery for a given rotational speed of the vehicle drivetrain.

Hoppie, Lyle O. (Birmingham, MI)

1981-12-15T23:59:59.000Z

32

Hybrid: Braking  

NLE Websites -- All DOE Office Websites (Extended Search)

Button Stopped button highlighted subbanner graphic: gray bar Button Stopped button highlighted subbanner graphic: gray bar STOPPED When the vehicle is stopped, such as at a red light, the gasoline engine and electric motor shut off automatically so that energy is not wasted in idling. The battery continues to power auxillary systems, such as the air conditioning and dashboard displays. stage graphic: vertical blue rule Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Battery: The battery stores energy generated from the gasoline engine or, during regenerative braking, from the electric motor. Since the battery helps power the vehicle, it is larger and holds much more energy than batteries used to start conventional vehicles. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection.

33

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Button Stopped button highlighted subbanner graphic: gray bar Button Stopped button highlighted subbanner graphic: gray bar STOPPED When the vehicle is stopped, such as at a red light, the gasoline engine and electric motor shut off automatically so that energy is not wasted in idling. The battery continues to power auxillary systems, such as the air conditioning and dashboard displays. stage graphic: vertical blue rule Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection. Battery: The battery stores energy generated from the gasoline engine or, during regenerative braking, from the electric motor. Since the battery helps power the vehicle, it is larger and holds much more energy than batteries used to start conventional vehicles. Main stage: See through car with battery, engine, and electric motor visible. The car is stopped at an intersection.

34

Traction Drive Systems Breakout  

NLE Websites -- All DOE Office Websites (Extended Search)

Traction Drive Systems Breakout Traction Drive Systems Breakout John M. Miller, PhD, PE, F.IEEE, F.SAE Oak Ridge National Laboratory Facilitator July 24, 2012 EV Everywhere Grand Challenge Vehicle Technologies Program - Advanced Power Electronics and Electric Motors eere.energy.gov EV Everywhere Traction Drive System * DOE goals for Electric Traction Drive System (TDS) innovations must be disruptive innovation focused to meet the CY2022 price target ($20,000 $25,000) for a mid-sized 5 passenger sedan having 5 year simple payback. Enhanced Efficiency Reduced Cost Traction Drive System EETT Roadmap: "Therefore, research is needed to develop technologies that are less expensive and, at the same time, smaller, lighter, more efficient, and equally reliable as conventional automotive technologies. "

35

Experimental Verification of Discretely Variable Compression Braking Control for Heavy Duty Vehicles  

E-Print Network (OSTI)

and Control, [11] T.R. Fortescue, L.S. Kershenbaum, and B.E.scheme is proposed by Fortescue et al. [11] in which a time-

Vahidi, Ardalan; Stefanopoulou, Anna G.; Farias, Phil; Tsao, Tsu Chin

2003-01-01T23:59:59.000Z

36

Full Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Braking button highlighted Stopped button Braking button highlighted Stopped button BRAKING PART 1 Regenerative braking converts otherwise wasted energy from braking into electricity and stores it in the battery. In regenerative braking, the electric motor is reversed so that, instead of using electricity to turn the wheels, the rotating wheels turn the motor and create electricity. Using energy from the wheels to turn the motor slows the vehicle down. Go to next… stage graphic: vertical blue rule Main stage: See through car with battery, engine, generator, power split device, and electric motor visible. The car is decelerating. There are arrows flowing from the front wheels to the power split device to the electric motor to the battery. Main stage: See through car with battery, engine, generator, power split device, and electric motor visible. The car is decelerating. There are arrows flowing from the front wheels to the power split device to the electric motor to the battery.

37

Method and apparatus for wind turbine braking  

DOE Patents (OSTI)

A method for braking a wind turbine including at least one rotor blade coupled to a rotor. The method includes selectively controlling an angle of pitch of the at least one rotor blade with respect to a wind direction based on a design parameter of a component of the wind turbine to facilitate reducing a force induced into the wind turbine component as a result of braking.

Barbu, Corneliu (Laguna Hills, CA); Teichmann, Ralph (Nishkayuna, NY); Avagliano, Aaron (Houston, TX); Kammer, Leonardo Cesar (Niskayuna, NY); Pierce, Kirk Gee (Simpsonville, SC); Pesetsky, David Samuel (Greenville, SC); Gauchel, Peter (Muenster, DE)

2009-02-10T23:59:59.000Z

38

Vehicle brake testing system  

SciTech Connect

This invention relates to a force measuring system capable of measuring forces associated with vehicle braking and of evaluating braking performance. The disclosure concerns an invention which comprises a first row of linearly aligned plates, a force bearing surface extending beneath and beside the plates, vertically oriented links and horizontally oriented links connecting each plate to a force bearing surface, a force measuring device in each link, a transducer coupled to each force measuring device, and a computing device coupled to receive an output signal from the transducer indicative of measured force in each force measuring device. The present invention may be used for testing vehicle brake systems.

Stevens, Samuel S [Harriman, TN; Hodgson, Jeffrey W [Lenoir City, TN

2002-11-19T23:59:59.000Z

39

Svendborg Brakes | Open Energy Information  

Open Energy Info (EERE)

energy Product Denmark-based manufacturer of braking systems for the wind industry, as well as for the oil sector. References Svendborg Brakes1 LinkedIn Connections CrunchBase...

40

Reliability mathematics analysis on traction substation operation  

Science Conference Proceedings (OSTI)

In electrified railway traction power supply systems, the operational qualities and reliabilities of the main traction transformer loop is higher, but ones of bus output units is comparatively low. The traction transformer loop still works when output ... Keywords: Erlang distribution, Markov theory, life, reliability, traction substation, transformer

Hongsheng Su

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Braking system for use with an arbor of a microscope  

DOE Patents (OSTI)

A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling device causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

Norgren, Duane U. (Orinda, CA)

1984-01-01T23:59:59.000Z

42

Simple cost model for EV traction motors  

DOE Green Energy (OSTI)

A simple cost model has been developed that allows the calculation of the OEM cost of electric traction motors of three different types, normalized as a function of power in order to accommodate different power and size. The model includes enough information on the various elements integrated in the motors to allow analysis of individual components and to factor-in the effects of changes in commodities prices. A scalable cost model for each of the main components of an electric vehicle (EV) is a useful tool that can have direct application in computer simulation or in parametric studies. For the cost model to have wide usefulness, it needs to be valid for a range of values of some parameter that determines the magnitude or size of the component. For instance, in the case of batteries, size may be determined by energy capacity, usually expressed in kilowatt-hours (kWh), while in the case of traction motors, size is better determined by rated power, usually expressed in kilowatts (kW). The simplest case is when the cost of the component in question is a direct function of its size; then cost is simply the product of its specific cost ($/unit size) and the number of units (size) in the vehicle in question. Batteries usually fall in this category (cost = energy capacity x $/kWh). But cost is not always linear with size or magnitude; motors (and controllers), for instance, become relatively less expensive as power rating increases. Traction motors, one of the main components for EV powertrains are examined in this paper, and a simplified cost model is developed for the three most popular design variations.

Cuenca, R.M.

1995-02-01T23:59:59.000Z

43

Regenerative braking device  

DOE Patents (OSTI)

Disclosed are several embodiments of a regenerative braking device for an automotive vehicle. The device includes a plurality of rubber rollers (24, 26) mounted for rotation between an input shaft (14) connectable to the vehicle drivetrain and an output shaft (16) which is drivingly connected to the input shaft by a variable ratio transmission (20). When the transmission ratio is such that the input shaft rotates faster than the output shaft, the rubber rollers are torsionally stressed to accumulate energy, thereby slowing the vehicle. When the transmission ratio is such that the output shaft rotates faster than the input shaft, the rubber rollers are torsionally relaxed to deliver accumulated energy, thereby accelerating or driving the vehicle.

Hoppie, Lyle O. (Birmingham, MI)

1982-01-12T23:59:59.000Z

44

Brake System Modeling and Control  

E-Print Network (OSTI)

of 3447 kPa Upper Left: Volts vs. Angular Position, showingone cycle. Lower Right: Volts vs. Position at several brakewith a magnitude of several volts. The INA118, a precision

Hedrick, J. K.; Uchanski, M.

2001-01-01T23:59:59.000Z

45

Commercial Motor Vehicle Brake Assessment Tools  

E-Print Network (OSTI)

Commercial Motor Vehicle Brake Assessment Tools Commercial Motor Vehicle Roadside Technology Corridor Safety Technology Showcase October 14, 2010 Commercial Motor Vehicle Roadside Technology Corridor #12;Overview · Commercial Motor Vehicle (CMV) Air Brake System · North American Standard Level-1

46

CMV Brake Wear and Performance Test Little is known about the brake  

E-Print Network (OSTI)

inspections were due to brake defects. Additionally, brake maintenance and repair present a significant cost Center for Transportation Analysis (CTA) Research Areas Aviation Safety Air Traffic Management Analysis Environmental Policy Analysis Highway Safety Intelligent Transportation Systems Logistics Management Supply

47

Commercial Motor Vehicle Brake-Related Research  

E-Print Network (OSTI)

Commercial Motor Vehicle Brake-Related Research Commercial Motor Vehicle Roadside Technology Corridor Safety Technology Showcase October 14, 2010 Commercial Motor Vehicle Roadside Technology Corridor

48

Multidisciplinary design optimization of an automotive magnetorheological brake design  

Science Conference Proceedings (OSTI)

This paper presents the development of a new electromechanical brake system using magnetorheological (MR) fluid. The proposed brake system consists of rotating disks immersed in a MR fluid and enclosed in an electromagnet, where the yield stress of the ... Keywords: Automotive brake, Computational fluid dynamics, Electric brake actuator, Finite element analysis, Magnetorheological fluid, Multidisciplinary design optimization

Edward J. Park; Luis Falco da Luz; Afzal Suleman

2008-02-01T23:59:59.000Z

49

Phase II CRADA ORNL99-0568 Report : Developing Transmission-Less Inverter Drive Systems for Axial-Gap Permanent magnet Accessory and Traction Motors and Generators  

DOE Green Energy (OSTI)

Researchers of the Oak Ridge National Laboratory's (ORNLs) Power Electronics and Electric Machine Research Center (PEEMRC) collaborated with Visual Computing Systems (VCS) to develop an electric axial-gap permanent magnet (PM) motor controlled by a self-sensing inverter for driving vehicle accessories such as power steering, air conditioning, and brakes. VCS designed an 8 kW motor based on their Segmented Electromagnetic Array (SEMA) technology. ORNL designed a 10 kW inverter to fit within the volume of a housing, which had been integrated with the motor. This modular design was pursued so that multiple modules could be used for higher power applications. ORNL built the first inverter under the cooperative research and development agreement (CRADA) ORNL 98-0514 and drove a refurbished Delta motor with no load during the Merit Review at ORNL on Monday, May 17, 1999. Inverter circuitry and instructions for assembling the inverters were sent to VCS. A report was prepared and delivered during the Future Car Congress in April 2000, at Arlington, Virginia. Collaboration continued under CRADA ORNL 99-0568 as VCS designed and built a SEMA motor with a dual coil platter to be the traction motor for an electric truck. VCS and ORNL assembled two 45 kW inverters. Each inverter drove one coil, which was designed to deliver 15 kW continuous power and 45 kW peak power for 90 s. The vehicle was road tested as part of the Future Truck Competition. A report was prepared and delivered during the PCIM in October 2000, at Boston, Massachusetts.

McKeever, J.W.

2001-08-06T23:59:59.000Z

50

Phase II CRADA ORNL99-0568 Report : Developing Transmission-Less Inverter Drive Systems for Axial-Gap Permanent magnet Accessory and Traction Motors and Generators  

SciTech Connect

Researchers of the Oak Ridge National Laboratory's (ORNLs) Power Electronics and Electric Machine Research Center (PEEMRC) collaborated with Visual Computing Systems (VCS) to develop an electric axial-gap permanent magnet (PM) motor controlled by a self-sensing inverter for driving vehicle accessories such as power steering, air conditioning, and brakes. VCS designed an 8 kW motor based on their Segmented Electromagnetic Array (SEMA) technology. ORNL designed a 10 kW inverter to fit within the volume of a housing, which had been integrated with the motor. This modular design was pursued so that multiple modules could be used for higher power applications. ORNL built the first inverter under the cooperative research and development agreement (CRADA) ORNL 98-0514 and drove a refurbished Delta motor with no load during the Merit Review at ORNL on Monday, May 17, 1999. Inverter circuitry and instructions for assembling the inverters were sent to VCS. A report was prepared and delivered during the Future Car Congress in April 2000, at Arlington, Virginia. Collaboration continued under CRADA ORNL 99-0568 as VCS designed and built a SEMA motor with a dual coil platter to be the traction motor for an electric truck. VCS and ORNL assembled two 45 kW inverters. Each inverter drove one coil, which was designed to deliver 15 kW continuous power and 45 kW peak power for 90 s. The vehicle was road tested as part of the Future Truck Competition. A report was prepared and delivered during the PCIM in October 2000, at Boston, Massachusetts.

McKeever, J.W.

2001-08-06T23:59:59.000Z

51

Advanced Electric Traction System Technology Development  

SciTech Connect

As a subcontractor to General Motors (GM), Ames Laboratory provided the technical expertise and supplied experimental materials needed to assess the technology of high energy bonded permanent magnets that are injection or compression molded for use in the Advanced Electric Traction System motor. This support was a sustained (Phase 1: 6/07 to 3/08) engineering effort that builds on the research achievements of the primary FreedomCAR project at Ames Laboratory on development of high temperature magnet alloy particulate in both flake and spherical powder forms. Ames Lab also provide guidance and direction in selection of magnet materials and supported the fabrication of experimental magnet materials for development of injection molding and magnetization processes by Arnold Magnetics, another project partner. The work with Arnold Magnetics involved a close collaboration on particulate material design and processing to achieve enhanced particulate properties and magnetic performance in the resulting bonded magnets. The overall project direction was provided by GM Program Management and two design reviews were held at GM-ATC in Torrance, CA. Ames Lab utilized current expertise in magnet powder alloy design and processing, along with on-going research advances being achieved under the existing FreedomCAR Program project to help guide and direct work during Phase 1 for the Advanced Electric Traction System Technology Development Program. The technical tasks included review of previous GM and Arnold Magnets work and identification of improvements to the benchmark magnet material, Magnequench MQP-14-12. Other benchmark characteristics of the desired magnet material include 64% volumetric loading with PPS polymer and a recommended maximum use temperature of 200C. A collaborative relationship was maintained with Arnold Magnets on the specification and processing of the bonded magnet material required by GM-ATC.

Anderson, Iver

2011-01-14T23:59:59.000Z

52

Wind turbine trailing-edge aerodynamic brake design  

DOE Green Energy (OSTI)

This report describes the design of a centrifugally actuated aerodynamic-overspeed device for a horizontal-axis wind turbine. The device will meet the following criteria; (1) It will be effective for airfoil angles of attack 0{degrees} to 45{degrees}. (2) It will be stowed inside the blade profile prior to deployment. (3) It will be capable of offsetting the positive torque produced by the overall blade. (4) Hinge moments will be minimized to lower actuator loads and cost. (5) It will be evaluated as a potential power modulating active rotor-control system. A literature review of aerodynamic braking devices was conducted. Information from the literature review was used to conceptualize the most effective devices for subsequent testing and design. Wind-tunnel test data for several braking devices are presented in this report. Using the data for the most promising configuration, a preliminary design was developed for a MICON 65/13 wind turbine with Phoenix 7.9-m rotor blades.

Quandt, G.

1996-01-01T23:59:59.000Z

53

Rare-Earth-Free Traction Motor: Rare Earth-Free Traction Motor for Electric Vehicle Applications  

Science Conference Proceedings (OSTI)

REACT Project: Baldor will develop a new type of traction motor with the potential to efficiently power future generations of EVs. Unlike todays large, bulky EV motors which use expensive, imported rare-earth-based magnets, Baldors motor could be light, compact, contain no rare earth materials, and have the potential to deliver more torque at a substantially lower cost. Key innovations in this project include the use of a unique motor design, incorporation of an improved cooling system, and the development of advanced materials manufacturing techniques. These innovations could significantly reduce the cost of an electric motor.

None

2012-01-01T23:59:59.000Z

54

Modular PM Motor Drives for Automotive Traction Applications  

DOE Green Energy (OSTI)

This paper presents modular permanent magnet (PM) motor drives for automotive traction applications. A partially modularized drive system consisting of a single PM motor and multiple inverters is described. The motor has multiple three-phase stator winding sets and each winding set is driven with a separate three-phase inverter module. A truly modularized inverter and motor configuration based on an axial-gap PM motor is then introduced, in which identical PM motor modules are mounted on a common shaft and each motor module is powered by a separate inverter module. The advantages of the modular approach for both inverter and motor include: (1) power rating scalability--one design meets different power requirements by simply stacking an adequate number of modules, thus avoiding redesigning and reducing the development cost, (2) increased fault tolerance, and (3) easy repairing. A prototype was constructed by using two inverters and an axial-gap PM motor with two sets of three-phase stat or windings, and it is used to assist the diesel engine in a hybrid electric vehicle converted from a Chevrolet Suburban. The effect of different pulse-width-modulation strategies for both motoring and regenerative modes on current control is analyzed. Torque and regenerative control algorithms are implemented with a digital signal processor. Analytical and initial testing results are included in the paper.

Su, G.J.

2001-10-29T23:59:59.000Z

55

Niobium Alloying in Grey Cast Iron for Vehicle Brake Discs  

Science Conference Proceedings (OSTI)

Presentation Title, Niobium Alloying in Grey Cast Iron for Vehicle Brake Discs. Author(s) ... Microtexture Analysis of a Hot Rolled Silicon Electric Steel Niobium

56

Traction sheave elevator, hoisting unit and machine space  

DOE Patents (OSTI)

Traction sheave elevator consisting of an elevator car moving along elevator guide rails, a counterweight moving along counterweight guide rails, a set of hoisting ropes (3) on which the elevator car and counterweight are suspended, and a drive machine unit (6) driving a traction sheave (7) acting on the hoisting ropes (3) and placed in the elevator shaft. The drive machine unit (6) is of a flat construction. A wall of the elevator shaft is provided with a machine space with its open side facing towards the shaft, the essential parts of the drive machine unit (6) being placed in the space. The hoisting unit (9) of the traction sheave elevator consists of a substantially discoidal drive machine unit (6) and an instrument panel (8) mounted on the frame (20) of the hoisting unit.

Hakala, Harri (Hyvinkaa, FI); Mustalahti, Jorma (Hyvinkaa, FI); Aulanko, Esko (Kerava, FI)

2000-01-01T23:59:59.000Z

57

Solar tracker motor having a fixed caliper and a translating caliper each with an electromagnetic brake system  

Science Conference Proceedings (OSTI)

Concepts and technologies described herein provide for an accurate and cost-effective method for rotating a solar array disk for tracking the movement of the sun. According to various aspects, a motor includes a fixed caliper and a translating caliper positioned adjacent to one another. Electromagnetically controlled brakes on the translating caliper grip the solar array disk while adjacent, but spaced apart, electromagnets on the fixed caliper and the translating caliper are energized to create an attractive force that pulls the translating caliper with the solar array disk toward the fixed caliper. After reaching the fixed caliper, brakes on the fixed caliper are engaged with the disk, brakes on the translating caliper are released from the disk, and the translating caliper is pushed back to the starting location where the process repeats until the desired rotation is completed.

Rau, Scott James

2013-01-29T23:59:59.000Z

58

Study on Regenerative Brake Method of Hybrid Electric Drive System of Armored Vehicle  

Science Conference Proceedings (OSTI)

Aiming at characteristics of regenerative brake of hybrid electric drive system of tracked armored vehicle, mechanism of regenerative brake by pulse width modulation is in-depth analyzed, motor speed, brake current, feedback current, feedback energy ... Keywords: hybrid electric drive, motor, regenerative brake

Li Hua; Zhong Meng-chun; Zhang Jian; Xu Da; Lin Hai

2011-10-01T23:59:59.000Z

59

Regenerative braking on bicycles to power LED safety flashers  

E-Print Network (OSTI)

This work develops a method for capturing some of the kinetic energy ordinarily lost during braking on bicycles to power LED safety flashers. The system is designed to eliminate: (a) battery changing in popular LED flashers, ...

Collier, Ian M

2005-01-01T23:59:59.000Z

60

Investigation of aerodynamic braking devices for wind turbine applications  

DOE Green Energy (OSTI)

This report documents the selection and preliminary design of a new aerodynamic braking system for use on the stall-regulated AWT-26/27 wind turbines. The goal was to identify and design a configuration that offered improvements over the existing tip brake used by Advanced Wind Turbines, Inc. (AWT). Although the design objectives and approach of this report are specific to aerodynamic braking of AWT-26/27 turbines, many of the issues addressed in this work are applicable to a wider class of turbines. The performance trends and design choices presented in this report should be of general use to wind turbine designers who are considering alternative aerodynamic braking methods. A literature search was combined with preliminary work on device sizing, loads and mechanical design. Candidate configurations were assessed on their potential for benefits in the areas of cost, weight, aerodynamic noise, reliability and performance under icing conditions. As a result, two configurations were identified for further study: the {open_quotes}spoiler-flap{close_quotes} and the {open_quotes}flip-tip.{close_quotes} Wind tunnel experiments were conducted at Wichita State University to evaluate the performance of the candidate aerodynamic brakes on an airfoil section representative of the AWT-26/27 blades. The wind tunnel data were used to predict the braking effectiveness and deployment characteristics of the candidate devices for a wide range of design parameters. The evaluation was iterative, with mechanical design and structural analysis being conducted in parallel with the braking performance studies. The preliminary estimate of the spoiler-flap system cost was $150 less than the production AWT-26/27 tip vanes. This represents a reduction of approximately 5 % in the cost of the aerodynamic braking system. In view of the preliminary nature of the design, it would be prudent to plan for contingencies in both cost and weight.

Griffin, D.A. [R. Lynette & Associates, Seattle, WA (United States)

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Traction drive automatic transmission for gas turbine engine driveline  

SciTech Connect

A transaxle driveline for a wheeled vehicle has a high speed turbine engine and a torque splitting gearset that includes a traction drive unit and a torque converter on a common axis transversely arranged with respect to the longitudinal centerline of the vehicle. The drive wheels of the vehicle are mounted on a shaft parallel to the turbine shaft and carry a final drive gearset for driving the axle shafts. A second embodiment of the final drive gearing produces an overdrive ratio between the output of the first gearset and the axle shafts. A continuously variable range of speed ratios is produced by varying the position of the drive rollers of the traction unit. After starting the vehicle from rest, the transmission is set for operation in the high speed range by engaging a first lockup clutch that joins the torque converter impeller to the turbine for operation as a hydraulic coupling.

Carriere, Donald L. (Livonia, MI)

1984-01-01T23:59:59.000Z

62

A frequency domain model for 3 kV dc traction dc-side resonance identification  

SciTech Connect

Frequency-dependent effects in railway traction power systems arise from the impedance of substation and locomotive line filters and the traction line. Harmonic noise from traction drives and substations can excite resonances and produce overcurrent or overvoltage conditions at critical points in the network. In this paper, the harmonic feeding impedances of a 3 kV DC traction system seen from the rectifier substation, locomotive drive converter and pantograph terminals are presented. Several substation and locomotive filters are considered with a frequency-dependent traction line. Resonances attributed to the substation filter, locomotive filter and traction line are separate and distinct, the line introducing poles and zeros in the audio frequency (AF) range which vary in frequency and magnitude with locomotive position.

Hill, R.J. [Univ. of Bath (United Kingdom). School of Electronic and Electrical Engineering; Fracchia, M.; Pozzobon, P.; Sciutto, G. [Univ. degli Studi di Genova (Italy). Dipt. di Ingegneria Elettrica

1995-08-01T23:59:59.000Z

63

Impacts of Cooling Technology on Solder Fatigue for Power Modules in Electric Traction Drive Vehicles: Preprint  

SciTech Connect

Describes three power module cooling topologies for electric traction drive vehicles: two advanced options using jet impingement cooling and one option using pin-fin liquid cooling.

O' Keefe, M.; Vlahinos, A.

2009-08-01T23:59:59.000Z

64

Regenerative braking device with rotationally mounted energy storage means  

DOE Patents (OSTI)

A regenerative braking device for an automotive vehicle includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (30) and an output shaft (32), clutches (50, 56) and brakes (52, 58) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. In a second embodiment the clutches and brakes are dispensed with and the variable ratio transmission is connected directly across the input and output shafts. In both embodiments the rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft rotates faster or relative to the output shaft and are torsionally relaxed to deliver energy to the vehicle when the output shaft rotates faster or relative to the input shaft.

Hoppie, Lyle O. (Birmingham, MI)

1982-03-16T23:59:59.000Z

65

FreedomCAR Advanced Traction Drive Motor Development Phase I  

DOE Green Energy (OSTI)

The overall objective of this program is to design and develop an advanced traction motor that will meet the FreedomCAR and Vehicle Technologies (FCVT) 2010 goals and the traction motor technical targets. The motor specifications are given in Section 1.3. Other goals of the program include providing a cost study to ensure the motor can be developed within the cost targets needed for the automotive industry. The program has focused on using materials that are both high performance and low costs such that the performance can be met and cost targets are achieved. In addition, the motor technologies and machine design features must be compatible with high volume manufacturing and able to provide high reliability, efficiency, and ruggedness while simultaneously reducing weight and volume. Weight and volume reduction will become a major factor in reducing cost, material cost being the most significant part of manufacturing cost at high volume. Many motor technology categories have been considered in the past and present for traction drive applications, including: brushed direct current (DC), PM (PM) brushless dc (BLDC), alternating current (AC) induction, switched reluctance and synchronous reluctance machines. Of these machine technologies, PM BLDC has consistently demonstrated an advantage in terms of power density and efficiency. As rare earth magnet cost has declined, total cost may also be reduced over the other technologies. Of the many different configurations of PM BLDC machines, those which incorporate power production utilizing both magnetic torque as well as reluctance torque appear to have the most promise for traction applications. There are many different PM BLDC machine configurations which employ both of these torque producing mechanisms; however, most would fall into one of two categories--some use weaker magnets and rely more heavily on reluctance torque (reluctance-dominant PM machines), others use strong PMs and supplement with reluctance torque (magnet-dominant PM machines). This report covers a trade study that was conducted in this phase I program to explore which type of machine best suits the FCVT requirements.

Ley, Josh (UQM Technologies, Inc.); Lutz, Jon (UQM Technologies, Inc.)

2006-09-01T23:59:59.000Z

66

A Multiphase Traction/Fast-Battery-Charger Drive for Electric or Plug-in Hybrid Vehicles  

E-Print Network (OSTI)

A Multiphase Traction/Fast-Battery-Charger Drive for Electric or Plug-in Hybrid Vehicles Solutions and torque ripples. Keywords- Electric Vehicle, Plug-in Hybrid Vehicle, On-board Battery Charger, H on an original electric drive [1]-[3] dedicated to the vehicle traction and configurable as a battery charger

Paris-Sud XI, Université de

67

Oxygen-Diffused Titanium as a Candidate Brake Rotor Material  

SciTech Connect

Titanium alloys are one of several candidate materials for the next generation of truck disk brake rotors. Despite their advantages of lightweight relative to cast iron and good strength and corrosion resistance, titanium alloys are unlikely to be satisfactory brake rotor materials unless their friction and wear behavior can be significantly improved. In this study, a surface engineering process oxygen diffusion was applied to titanium rotors and has shown very encouraging results. The oxygen diffused Ti-6Al-4V (OD-Ti) was tested on a sub-scale brake tester against a flat block of commercial brake lining material and benchmarked against several other Ti-based materials, including untreated Ti-6Al-4V, ceramic particle-reinforced Ti composites (MMCs), and a thermal-spray-coated Ti alloy. With respect to friction, the OD-Ti outperformed all other candidate materials under the imposed test conditions with the friction coefficient remaining within a desirable range of 0.35-0.50, even under the harshest conditions when the disk surface temperature reached nearly 600 ?C. In addition, the OD-Ti showed significantly improved wear-resistance over the non-treated one and was even better than the Ti-based composite materials.

Qu, Jun [ORNL; Blau, Peter Julian [ORNL; Jolly, Brian C [ORNL

2009-01-01T23:59:59.000Z

68

Heavy and Overweight Vehicle Brake Testing: Five-Axle Combination Tractor-Flatbed Final Report  

Science Conference Proceedings (OSTI)

The Federal Motor Carrier Safety Administration, in coordination with the Federal Highway Administration, sponsored the Heavy and Overweight Vehicle Brake Testing (HOVBT) program in order to provide information about the effect of gross vehicle weight (GVW) on braking performance. Because the Federal Motor Carrier Safety Regulations limit the number of braking system defects that may exist for a vehicle to be allowed to operate on the roadways, the examination of the effect of brake defects on brake performance for increased loads is also relevant. The HOVBT program seeks to provide relevant information to policy makers responsible for establishing load limits, beginning with providing test data for a combination tractor/trailer. This testing was conducted on a five-axle combination vehicle with tractor brakes meeting the Reduced Stopping Distance requirement rulemaking. This report provides a summary of the testing activities, the results of various analyses of the data, and recommendations for future research. Following a complete brake rebuild, instrumentation, and brake burnish, stopping tests were performed from 20 and 40 mph with various brake application pressures (15 psi, 25 psi, 35 psi, 45 psi, 55 psi, and full system pressure). These tests were conducted for various brake conditions at the following GVWs: 60,000, 80,000, 91,000, 97,000, 106,000, and 116,000 lb. The 80,000-lb GVWs included both balanced and unbalanced loads. The condition of the braking system was also varied. To introduce these defects, brakes (none, forward drive axle, or rear trailer axle) were made inoperative. In addition to the stopping tests, performance-based brake tests were conducted for the various loading and brake conditions. Analysis of the stopping test data showed the stopping distance to increase with load (as expected) and also showed that more braking force was generated by the drive axle brakes than the trailer axle brakes. The constant-pressure stopping test data revealed a linear relationship between brake application pressure and was used to develop an algorithm to normalize stopping data for weight and initial speed.

Lascurain, Mary Beth [ORNL] ORNL; Capps, Gary J [ORNL] ORNL; Franzese, Oscar [ORNL] ORNL

2013-10-01T23:59:59.000Z

69

Energy Efficiency in Heavy Vehicle Tires, Drivetrains, and Braking Systems  

DOE Green Energy (OSTI)

This document was prepared to support the primary goals of the Department of Energy, Office of Heavy Vehicle Technologies. These were recently stated as follows: ''Develop by 2004 the enabling technologies for a class 7-8 truck with a fuel efficiency of 10 mpg (at 65 mph) which will meet prevailing emission standards. For Class 3-6 trucks operating on an urban driving cycle, develop by 2004 commercially viable vehicles that achieve at least double the fuel economy of comparable current vehicles (1999), and as a research goal, reduce criteria pollutants to 30% below EPA standards. Develop by 2004 the diesel engine enabling technologies to support large-scale industry dieselization of Class 1 and 2 trucks, achieving a 35 % fuel efficiency improvement over comparable gasoline-fueled trucks, while meeting applicable emissions standards.'' The enabling technologies for improving the fuel efficiency of trucks, include not only engine technologies but also technologies involved with lowering the rolling resistance of tires, reducing vehicle aerodynamic drag, improving thermal management, and reducing parasitic frictional losses in drive train components. Opportunities also exist for making better use of the energy that might ordinarily be dissipated during vehicle braking. Braking systems must be included in this evaluation since safety in truck operations is vital, and braking requirements are greater for vehicles having lowered resistance to rolling. The Office of Heavy Vehicle Technologies has initiated a program to improve the aerodynamics of heavy vehicles through wind tunnel testing, computational modeling, and on-road evaluations. That activity is described in a separate multi-year plan; therefore, emphasis in this document will be on tires, drive trains, and braking systems. Recent, dramatic fluctuations in diesel fuel prices have emphasized the importance of effecting savings in truck fuel economy by implementing new component designs and materials.

Peter J. Blau

2000-04-26T23:59:59.000Z

70

Improvements on open and traction boundary conditions for Navier-Stokes time-splitting methods  

Science Conference Proceedings (OSTI)

We present in this paper a numerical scheme for incompressible Navier-Stokes equations with open and traction boundary conditions, in the framework of pressure-correction methods. A new way to enforce this type of boundary condition is proposed and provides ... Keywords: Bifurcated tube, Fractional step methods, Navier-Stokes equations, Open boundary condition, Pressure boundary condition, Pressure-correction methods, Projection methods, Square cylinder, Traction boundary condition

A. Poux; S. Glockner; M. Azaez

2011-05-01T23:59:59.000Z

71

Brake rotor design and comparison using finite element analysis : an investigation in topology optimization.  

E-Print Network (OSTI)

??Disc brake technology used for mountain bikes, and mountain bike technology in general, has improved significantly as the sport of mountain biking has evolved. Disc (more)

Domond, Kenneth

2010-01-01T23:59:59.000Z

72

Numerical Simulation of Brake Discs of CRH3 High-Speed Trains ...  

Science Conference Proceedings (OSTI)

... the research object?the course of emergency brake was simulated by ANSYS. .... Energy X-Ray Diffraction Microscopy Studies of Bulk Polycrystal Responses.

73

Injection Timing Effects on Brake Fuel Conversion Efficiency and Engine System's Respones  

E-Print Network (OSTI)

Societal concerns on combustion-based fuel consumption are ever-increasing. With respect to internal combustion engines, this translates to a need to increase brake fuel conversion efficiency (BFCE). Diesel engines are a relatively efficient internal combustion engine to consider for numerous applications, but associated actions to mitigate certain exhaust emissions have generally deteriorated engine efficiency. Conventionally, diesel engine emission control has centered on in-cylinder techniques. Although these continue to hold promise, the industry trend is presently favoring the use of after-treatment devices which create new opportunities to improve the diesel engine's brake fuel conversion efficiency. This study focuses on injection timing effects on the combustion processes, engine efficiency, and the engine system's responses. The engine in the study is a medium duty diesel engine (capable of meeting US EPA Tier III off road emission standards) equipped with common rail direct fuel injection, variable geometry turbo charging, and interfaced with a custom built engine controller. The study found that injection timing greatly affected BFCE by changing the combustion phasing. BFCE would increase up to a maximum then begin to decrease as phasing became less favorable. Combustion phasing would change from being mostly mixing controlled combustion to premixed combustion as injection timing would advance allowing more time for fuel to mix during the ignition delay. Combustion phasing, in turn, would influence many other engine parameters. As injection timing is advanced, in-cylinder temperatures and pressures amplify, and intake and exhaust manifold pressures deteriorate. Rate of heat release and rate of heat transfer increase when injection timing is advanced. Turbocharger speed falls with the advancing injection timing. Torque, however, rose to a maximum then fell off again even though engine speed and fueling rate were held constant between different injection timings. Interestingly, the coefficient of heat transfer changes from a two peak curve to a smooth one peak curve as the injection timing is advanced further. The major conclusion of the study is that injection advance both positively and negatively influences the diesel engine's response which contributes to the brake fuel conversion efficiency.

McLean, James Elliott

2011-08-01T23:59:59.000Z

74

Tachyon cosmology, supernovae data, and the big brake singularity  

SciTech Connect

We compare the existing observational data on type Ia supernovae with the evolutions of the Universe predicted by a one-parameter family of tachyon models which we have introduced recently [Phys. Rev. D 69, 123512 (2004)]. Among the set of the trajectories of the model which are compatible with the data there is a consistent subset for which the Universe ends up in a new type of soft cosmological singularity dubbed big brake. This opens up yet another scenario for the future history of the Universe besides the one predicted by the standard {lambda}CDM model.

Keresztes, Z.; Gergely, L. A.; Gorini, V.; Moschella, U.; Kamenshchik, A. Yu. [Department of Theoretical Physics, University of Szeged, Tisza Lajos krt 84-86, Szeged 6720 (Hungary); Department of Experimental Physics, University of Szeged, Dom Ter 9, Szeged 6720 (Hungary); Department of Theoretical Physics, University of Szeged, Tisza Lajos krt 84-86, Szeged 6720 (Hungary); Department of Experimental Physics, University of Szeged, Dom Ter 9, Szeged 6720 (Hungary); Department of Applied Science, London South Bank University, 103 Borough Road, London SE1 OAA (United Kingdom); Dipartimento di Scienze Fisiche e Mathematiche, Universita dell'Insubria, Via Valleggio 11, 22100 Como (Italy); INFN, sezione di Milano, Via Celoria 16, 20133 Milano (Italy); Dipartimento di Fisica and INFN, via Irnerio 46, 40126 Bologna (Italy); L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, Kosygin street 2, 119334 Moscow (Russian Federation)

2009-04-15T23:59:59.000Z

75

Dual-channel Haptic Synthesis of Viscoelastic Tissue Properties using Programmable Eddy Current Brakes  

Science Conference Proceedings (OSTI)

We describe a novel method for haptic synthesis of viscoelastic responses which employs a dual-channel haptic interface. It has motors that generate torque independently of velocity and brakes that generate viscous torque independently of position. ... Keywords: eddy current brakes, haptic simulation, viscoelastic simulation

Andrew H. C. Gosline; Vincent Hayward

2009-10-01T23:59:59.000Z

76

Microsoft PowerPoint - Real-Time Dynamic Brake Assessment poster.ppt [Compatibility Mode]  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Brake Assessment Dynamic Brake Assessment Purpose Conduct a proof-of-concept test to examine the feasibility of developing an on-board system to assess a vehicle's ability to stop based on typical low-pressure in-service braking events. Partnerships H.T. Hackney Company MGM Brakes Overview Funded through the Federal Motor Carrier Safety Administration's Vehicle and Roadside Operations Division Concept stemming from on the Department of Energy's Medium Truck Duty Cycle research as well as previous research conducted for the National Highway Transportation Safety Administration. Signals to be collected Real-time brake application pressure Vehicle speed and acceleration GPS location and grade information Vehicle weight (current load) Engine parameters such as RPM and torque To be conducted October 2010 -

77

A study of factors affecting foot movement time in a braking maneuver  

E-Print Network (OSTI)

The nature of foot movement time (MT) in an actual braking maneuver and in a stationary vehicle was investigated regarding the effects of age and gender of the driver and nature of the stimulus to which the driver was responding. ANOVAs showed that the nature of the stimulus was not a significant factor in length of MT, but distance between pedals and age-gender levels were found to have significant effects. For the actual braking maneuver, gender and the gender-by-age interaction were significant; in the stationary vehicle portion of the study, they were not. Mean foot MT for both genders over all conditions were 0.28 seconds for women and 0.22 seconds for men. For older drivers, over all conditions, the mean foot MT was 0.25 seconds, and, for the younger drivers, 0.24 seconds. Linear regressions revealed high intra-subject variation in MT, which was corroborated by comparing with data from other parts of the study. Poor r2 values for fitting the data to Fitts' Law and to a modification of Fitts' Law were attributed to this high intra-subject variation and to obtaining data from only two different movement amplitudes. It was found that drivers' foot MTs tended to converge to a common value when controlling the vehicle at 88 km/hr (55 mph) as opposed to sitting in the driver's seat while the vehicle was stationary; mean foot MT for each subject group decreased, and differences between genders and age groups significantly diminished while the car was in motion.

Berman, Andrea Helene

1994-01-01T23:59:59.000Z

78

An Inverter Packaging Scheme for an Integrated Segmented Traction Drive System  

Science Conference Proceedings (OSTI)

The standard voltage source inverter (VSI), widely used in electric vehicle/hybrid electric vehicle (EV/HEV) traction drives, requires a bulky dc bus capacitor to absorb the large switching ripple currents and prevent them from shortening the battery s life. The dc bus capacitor presents a significant barrier to meeting inverter cost, volume, and weight requirements for mass production of affordable EVs/HEVs. The large ripple currents become even more problematic for the film capacitors (the capacitor technology of choice for EVs/HEVs) in high temperature environments as their ripple current handling capability decreases rapidly with rising temperatures. It is shown in previous work that segmenting the VSI based traction drive system can significantly decrease the ripple currents and thus the size of the dc bus capacitor. This paper presents an integrated packaging scheme to reduce the system cost of a segmented traction drive.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL; Ayers, Curtis William [ORNL; Wiles, Randy H [ORNL

2013-01-01T23:59:59.000Z

79

University of Southampton Research Repository ePrints Soton  

E-Print Network (OSTI)

controlled brakes and steering [15], hybrid electric vehicles [16] or hybrid railway traction system [17. on Magnetics, vol. 35, no. 1, pp. 334­339, 1999. [6] W. Moon and I. Busch-Vishniac, "Modeling of piezoelectric: application to a railway traction device," IMechE J. Systems and Control Engineering, Part I, vol. 220, pp

80

This article was downloaded by:[Feng, W. J.] On: 5 June 2008  

E-Print Network (OSTI)

controlled brakes and steering [15], hybrid electric vehicles [16] or hybrid railway traction system [17. on Magnetics, vol. 35, no. 1, pp. 334­339, 1999. [6] W. Moon and I. Busch-Vishniac, "Modeling of piezoelectric: application to a railway traction device," IMechE J. Systems and Control Engineering, Part I, vol. 220, pp

Pan, Ernie

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
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81

List of Publications Utz von Wagner  

E-Print Network (OSTI)

controlled brakes and steering [15], hybrid electric vehicles [16] or hybrid railway traction system [17. on Magnetics, vol. 35, no. 1, pp. 334­339, 1999. [6] W. Moon and I. Busch-Vishniac, "Modeling of piezoelectric: application to a railway traction device," IMechE J. Systems and Control Engineering, Part I, vol. 220, pp

Berlin,Technische Universität

82

Engine control system for multiple combustion modes  

Science Conference Proceedings (OSTI)

To reduce the emission by Diesel-engine in railway traction, continuous development and innovation in combustion, sensing net, control method and strategies are required to met the legal requirements. Multiple combustion modes by Diesel engines can reduce ...

D. Bonta; V. Tulbure; Cl. Festila

2008-05-01T23:59:59.000Z

83

Low cost, compact, and high efficiency traction motor for electric and hybrid electric vehicles  

DOE Green Energy (OSTI)

A new motor drive, the switched reluctance motor drive, has been developed for hybrid-electric vehicles. The motor drive has been designed, built and tested in the test bed at a near vehicle scale. It has been shown that the switched reluctance motor drive is more suitable for traction application than any other motor drive.

Ehsani, Mark

2002-10-07T23:59:59.000Z

84

Stand for testing electrical machines up to 1,500 kilowatts used in railway traction  

Science Conference Proceedings (OSTI)

The test stand for electric motors is intended to test electrical machines used in railway traction. The stand is the result of a research contract with the realization and implementation practice in SC Remarul February 16 SA-Cluj. The stand is designed ...

Gabriel Popa; Cristinel Ilie; Ion Potarnuche; Horea Galos; Valerius Stanciu; Sorin Arsene

2010-05-01T23:59:59.000Z

85

Motorized control for mirror mount apparatus  

DOE Patents (OSTI)

A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

Cutburth, Ronald W. (Tracy, CA)

1989-01-01T23:59:59.000Z

86

Fractional-Slot Surface Mounted PM Motors with Concentrated Windings for HEV Traction Drives  

Science Conference Proceedings (OSTI)

High-power density and efficiency resulting from elimination of rotor windings and reduced magnetic-flux losses have made the rare earth permanent magnet (PM) motor a leading candidate for the Department of Energy's Office of FreedomCAR and Vehicle Technologies (FCVTs) traction drive motor. These traction drives are generally powered by radial-gap motors, having the magnets on or embedded in a rotating cylinder separated from the inside surface of a slotted cylindrical stator by an annular gap. The two main types of radial-gap PM rotors are those with magnets mounted on the surface of a supporting back iron, called PM surface mounted (PMSM) motors, and those with magnets mounted in slots in the rotor, called interior PM (IPM) motors. Most early PM motor research was on the PMSM motor, which was thought to have an inherently low stator inductance. A low stator inductance can lead to currents dangerously exceeding rated current as the back-emf across the inductance increases with speed; consequently, part of the attempted solution has been to increase the stator inductance to reduce the rate of current rise. Although analysis suggested that there should be no problem designing sufficiently high stator inductance into PMSMs, attempts to do so were often not successful and a motor design was sought that would have a higher intrinsic inductance. Commercial research at Toyota has focused on IPM motors because they can achieve a high-saliency ratio, which helps them operate over a high constant power speed ratio (CPSR), but they are more difficult to fabricate. The Oak Ridge National Laboratory's (ORNL) position has been to continue research on brushless direct current (dc) motors (BDCMs) because of ease of fabrication and increased power output. Recently there has been a revival of interest in a fractional-slot PMSMs [15] made with concentrated windings because they possess three important features. First, they can increase the motor's inductance sufficiently to reduce the characteristic current to value of the rated current, which will enable them to operate at high CPSR. This feature also limits short-circuit fault currents. Second, their segmented structure simplifies assembly problems and is expected to reduce assembly costs. Third, the back-emf waveform is nearly sinusoidal with low cogging. To examine in depth this design ORNL entered into a collaborative agreement with the University of Wisconsin to build and test a 6 kW laboratory demonstration unit. Design, fabrication, and testing of the unit to 4000 rpm were completed during FY 2005. The motor will be sent to ORNL to explore ways to control its inverter to achieve higher efficiency during FY 2006. This paper first reviews the concept of characteristic current and what is meant by optimal flux weakening. It then discusses application of the fractional-slot concentrated winding technique to increase the d-axis inductance of a PMSM showing how this approach differs from an integral-slot motor with sinusoidal-distributed windings. This discussion is followed by a presentation of collaborative analyses and comparison with the University of Wisconsin's measured data on a 6 kW, 36-slot, 30-pole motor with concentrated windings. Finally ORNL presents a PMSM design with integral-slot windings that appears to meet the FreedomCAR Specifications, but has some disadvantages. Further collaboration with the University of Wisconsin is planned for FY 2006 to design a motor that meets FreedomCAR specifications.

Bailey, J.M.

2005-10-24T23:59:59.000Z

87

Advanced Control Strategies for Voltage Source Converters in Microgrids and Traction Networks.  

E-Print Network (OSTI)

??Increasing concerns regarding global warming caused by greenhouse gases, which are mainly generated by conventional energy resources, e.g., fossil fuels, have created significant interest for (more)

Bahrani, Behrooz

2012-01-01T23:59:59.000Z

88

MODELING AND OPTIMIZATION OF INDIVIDUAL WHEEL ELECTRIC DRIVE ABS AND TRACTION CONTROL.  

E-Print Network (OSTI)

??With the advent of new technology in the field of automobiles and battery technology, the opportunity of using electric and hybrid vehicles has increased. Developments (more)

Malhotra, Guntas

2010-01-01T23:59:59.000Z

89

A Library of SIMULINK Blocks for Real-Time Control of HEV Traction John Chiasson1  

E-Print Network (OSTI)

, researchers have considered several motor types including the DC motor, induction motor, permanent magnet (PM algorithms for the various types of motor drives considered for hybrid electric vehicles (HEVs, and permanent magnet synchronous machines. This eliminates the need for specialized programming in C or assembly

Tolbert, Leon M.

90

Use of an auditory signal in a rear-end collision warning system: effects on braking force and reaction time  

E-Print Network (OSTI)

This simulator experiment is a preliminary study examining the effects of different auditory signals on braking force and reaction time in a rear-end collision warning system. A driving simulator was built in which subjects operated a computer driving game. Superimposed on the game screen was the image of a car which appeared to the driver to be ahead of him/her. The image enlarged in size, appearing to be a car applying its brakes. The participant was instructed to react as he would in a real driving situation by applying his/her brakes. Closing velocities of 10 miles per hour and 30 miles per hour were used. Braking times and forces were measured for four different warning sounds: 1) no warning; 2) a pulsed warning sound that increased in repetition rate; 3) a sound that increased in frequency; and, 4) a sound that increased in intensity. Results suggested that an auditory warning signal would decrease reaction time and increase maximum braking force applied. The sound that increased in frequency and the sound that increased in intensity provided the greatest savings in reaction time, approximately one quarter second, when compared to the no warning condition. The pulsed warning sound provided the greatest increase in braking force. Participants preferred the pulsed sound over the other warning sounds. Further research must be done to determine if the warning sounds decrease the reaction time enough to cause a significant reduction in accidents.

Hopkins, Jennifer Susan

1995-01-01T23:59:59.000Z

91

Collapse and Fragmentation of Molecular Cloud Cores. X. Magnetic Braking of Prolate and Oblate Cores  

E-Print Network (OSTI)

The collapse and fragmentation of initially prolate and oblate, magnetic molecular clouds is calculated in three dimensions with a gravitational, radiative hydrodynamics code. The code includes magnetic field effects in an approximate manner: magnetic pressure, tension, braking, and ambipolar diffusion are all modelled. The parameters varied for both the initially prolate and oblate clouds are the initial degree of central concentration of the radial density profile, the initial angular velocity, and the efficiency of magnetic braking (represented by a factor $f_{mb} = 10^{-4}$ or $10^{-3}$). The oblate cores all collapse to form rings that might be susceptible to fragmentation into multiple systems. The outcome of the collapse of the prolate cores depends strongly on the initial density profile. Prolate cores with central densities 20 times higher than their boundary densities collapse and fragment into binary or quadruple systems, whereas cores with central densities 100 times higher collapse to form single...

Boss, Alan P

2009-01-01T23:59:59.000Z

92

PM Motor Parametric Design Analyses for Hybrid Electric Vehicle Traction Drive Application: Interim Report  

DOE Green Energy (OSTI)

The Department of Energy's (DOE) Office of FreedomCAR (Cooperative Automotive Research) and Vehicle Technologies has a strong interest in making rapid progress in permanent magnet (PM) machine development. The program is directing various technology development projects that will advance the technology and lead to request for proposals (RFP) for manufacturer prototypes. This aggressive approach is possible because the technology is clearly within reach and the approach is deemed essential, based on strong market demand, escalating fuel prices, and competitive considerations. In response, this study began parallel development paths that included a literature search/review, development and utilization of multiple parametric models to determine the effects of design parameters, verification of the modeling methodology, development of an interior PM (IPM) machine baseline design, development of alternative machine baseline designs, and cost analyses for several candidate machines. This interim progress report summarizes the results of these activities as of June 2004. This report provides background and summary information for recent machine parametric studies and testing programs that demonstrate both the potential capabilities and technical limitations of brushless PM machines (axial gap and radial gap), the IPM machine, the surface-mount PM machines (interior or exterior rotor), induction machines, and switched reluctance machines. The FreedomCAR program, while acknowledging the progress made by Oak Ridge National Laboratory, Delphi, Delco-Remy International, and others in these programs, has redirected efforts toward a ''short path'' to a marketable and competitive PM motor for hybrid electric vehicle traction applications. The program has developed a set of performance targets for the type of traction machine desired. The short-path approach entails a comprehensive design effort focusing on the IPM machine and meeting the performance targets. The selection of the IPM machine reflects industry's confidence in this market-proven design that exhibits a power density surpassed by no other machine design.

Staunton, R.H.

2004-08-11T23:59:59.000Z

93

How Many CVs are Crossing the Period Gap? A Test for the Disruption of Magnetic Braking  

E-Print Network (OSTI)

We apply population synthesis techniques to calculate the present day number of two types of white dwarf-main sequence star (WDMS) binaries within the cataclysmic variable period gap. The first are post-common envelope binaries with secondary stars that have masses between 0.17 and 0.36 Msun (gPCEBs), such that they will commence mass transfer within the period gap. The second type are systems that were CVs at some point in their past, but detached once they evolved down in orbital period to ~3 h as a consequence of disrupted magnetic braking, and are crossing the period gap via gravitational radiation (dCVs). Full population synthesis calculations are performed where we assume either constant, global values of the common envelope ejection efficiency, or consider the ejection efficiency as a function of secondary mass. Several forms of magnetic braking are also considered. We predict an excess of dCVs over gPCEBs within the period gap of ~4 to ~13 assuming an ejection efficiency between 0.1 and 0.6, and a flat initial mass ratio distribution. This excess is revealed as a prominent peak at the location of the period gap in the orbital period distribution of the combined gPCEB and dCV population. We suggest that if such a feature is observed in the orbital period distribution of an observed sample of short orbital period WDMS binaries, this would strongly corroborate the disruption of magnetic braking.

P. J. Davis; U. Kolb; B. Willems; B. T. Gnsicke

2008-05-30T23:59:59.000Z

94

Variations in gear fatigue life for different wind turbine braking strategies  

SciTech Connect

A large number of gearbox failures have occurred in the wind industry in a relatively short period, many because service loads were underestimated. High-torque transients that occur during starting and stopping are difficult to predict and may be overlooked in specifying gearbox design. Although these events comprise a small portion of total load cycles, they can be the most damaging. The severity of these loads varies dramatically with the specific configuration of the wind turbine. The large number of failures in Danish-designed Micon 65 wind turbines prompted this investigation. The high-speed and low-speed shaft torques were measured on a two-stage helical gearbox of a single Micon 65 turbine. Transient events and normal running loads were combined statistically to obtain a typical annual load spectrum. The pitting and bending fatigue lives of the gear teeth were calculated by using Miner's rule for four different high-speed shaft brake configurations. Each breaking scenario was run for both a high- and a low-turbulence normal operating load spectrum. The analysis showed increases in gear life by up to a factor of 25 when the standard high-speed shaft brake is replaced with a dynamic brake or modified with a damper. 9 refs., 9 figs., 3 tabs.

McNiff, B.P. (Second Wind, Inc., Somerville, MA (USA)); Musial, W.D. (Solar Energy Research Inst., Golden, CO (USA)); Errichello, R. (GEARTECH, Albany, CA (USA))

1991-06-01T23:59:59.000Z

95

Variations in gear fatigue life for different wind turbine braking strategies  

DOE Green Energy (OSTI)

A large number of gearbox failures have occurred in the wind industry in a relatively short period, many because service loads were underestimated. High-torque transients that occur during starting and stopping are difficult to predict and may be overlooked in specifying gearbox design. Although these events comprise a small portion of total load cycles, they can be the most damaging. The severity of these loads varies dramatically with the specific configuration of the wind turbine. The large number of failures in Danish-designed Micon 65 wind turbines prompted this investigation. The high-speed and low-speed shaft torques were measured on a two-stage helical gearbox of a single Micon 65 turbine. Transient events and normal running loads were combined statistically to obtain a typical annual load spectrum. The pitting and bending fatigue lives of the gear teeth were calculated by using Miner's rule for four different high-speed shaft brake configurations. Each breaking scenario was run for both a high- and a low-turbulence normal operating load spectrum. The analysis showed increases in gear life by up to a factor of 25 when the standard high-speed shaft brake is replaced with a dynamic brake or modified with a damper. 9 refs., 9 figs., 3 tabs.

McNiff, B.P. (Second Wind, Inc., Somerville, MA (USA)); Musial, W.D. (Solar Energy Research Inst., Golden, CO (USA)); Errichello, R. (GEARTECH, Albany, CA (USA))

1991-06-01T23:59:59.000Z

96

Pneumatic brake control for precision stopping of heavy-duty vehicles  

E-Print Network (OSTI)

stopping of a 40 foot CNG bus for the Bus Precision Dockingfor two different 40 foot CNG buses (c1 and c2). Althoughpressure of two different CNG buses (c1 and c2) speeds since

Bu, Fanping; Tan, Han-Shue

2007-01-01T23:59:59.000Z

97

Design, Modeling And Control Of Steering And Braking For An Urban Electric Vehicle  

E-Print Network (OSTI)

service access to small electric cars. The research involvedservice access to small electric cars. The research involvedservice access to small electric cars. This concept has been

Maciua, Dragos

1996-01-01T23:59:59.000Z

98

Experimental Verifi cation of Discretely Variable Compression Braking Control for Heavy Duty Vehicles: Final Report  

E-Print Network (OSTI)

Conference, 2002. [14] T.R. Fortescue, L.S. Kershenbaum, andscheme is proposed by Fortescue et al. [14] in which a time-

Vahidi, Ardalan; Stefanopoulou, Anna G.; Wang, Xiaoyong; Tsao, Tsu Chin

2004-01-01T23:59:59.000Z

99

On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering  

E-Print Network (OSTI)

based on eddy current brakes because they are inexpensive, friction- e-mail: andrewg@cim.mcgill.ca e-mail: champ@cim.mcgill.ca e-mail: hayward@cim.mcgill.ca free, capable of fast turn-on time, and linear

Hayward, Vincent

100

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 15, NO. 3, MARCH 2007 403 Special Issue on Control  

E-Print Network (OSTI)

, traction control, and active safety systems that have the potential to decrease the number and severity powerplants (such as fuel cells), to issues in transmission, driveline, and integrated pow- ertrain control researched alternative powerplant technology for automotive vehicles, which holds promise for positive

Brennan, Sean

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

VEHICLE SPECIFICATIONS Vehicle Features Base Vehicle: 2010 Honda  

NLE Websites -- All DOE Office Websites (Extended Search)

Honda Honda Civic Hybrid VIN: JHMFA3F24AS005577 Seatbelt Positions: 5 Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control Front Disc Brakes Rear Disc Brakes Front Wheel Drive Regenerative Braking Anti-Lock Brakes Traction Control Air Bags AM/FM Stereo with CD State of Charge Meter 1 Weights Design Curb Weight: 2877 lb Delivered Curb Weight: 2982 lb Distribution F/R (%): 57/43 GVWR: 3792 lb GAWR F/R: 1973/1841 lb Payload 2 : 810 lb Performance Goal: 400 lb Dimensions Wheelbase: 106.3 in Track F/R: 59.1/60.2 in Length: 177.3 in Width: 69.0 in Height: 56.3 in Ground Clearance: 6.0 in Performance Goal: 5.0 in Tires Manufacturer: Bridgestone

102

Evaluation of a Current Source Active Power Filter to Reduce the DC Bus Capacitor in a Hybrid Electric Vehicle Traction Drive  

E-Print Network (OSTI)

Science Knoxville, TN, 37996, USA tolbert@utk.edu Abstract ­ In hybrid electric vehicles (HEV), a battery-source inverter, dc bus capacitor, Electric vehicle, Harmonic current, Hybrid electric vehicle. I. INTRODUCTION Electric Vehicle Traction Drive Shengnan Li Student Member, IEEE The University of Tennessee Department

Tolbert, Leon M.

103

Energy production control of an experimental kite system in presence of wind gusts.  

E-Print Network (OSTI)

Energy production control of an experimental kite system in presence of wind gusts. Rogelio Lozano for the production of wind energy, using a kite's traction force. The aim of this paper is to control the amount of energy produced by the kite, and to be able to fly it safely in the presence of strong wind gusts. Our

Recanati, Catherine

104

High voltage bus and auxiliary heater control system for an electric or hybrid vehicle  

DOE Green Energy (OSTI)

A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary. The control system further utilizes the heater to provide a safe discharge of a bank of energy storage capacitors following disconnection of the battery or one of the high voltage connectors used to transmit high voltage operating power to the various vehicle systems. The control circuit includes a high voltage clamping circuit that monitors the voltage on the bus and operates the heater to clamp down the bus voltage when it exceeds a pre-selected maximum voltage. The control system can also be used to phase in operation of the heater when the bus voltage exceeds a lower threshold voltage and can be used to phase out the auxiliary power unit charging and regenerative braking when the battery becomes fully charged.

Murty, Balarama Vempaty (West Bloomfield, MI)

2000-01-01T23:59:59.000Z

105

Safety Criteria for Isolated Direct Current Systems in Electric Vehicles: Traction Motor and Control Circuitry Under Charging and Driving Conditions  

Science Conference Proceedings (OSTI)

This report explains some of the background of the requirements for isolated DC systems covered by the standard for personnel protection devices for electric vehicle charging circuits (UL2231). The report provides insight that is intended to help achieve better designs of electric vehicles and chargers.

1999-12-01T23:59:59.000Z

106

Cell-ECM traction force modulates endogenous tension at cellcell contacts  

E-Print Network (OSTI)

and resisting ex- ternal forces, it is becoming increasingly evident that cell-ECM and cell­cell adhesions are also sites of transmission of active, cell-generated forces (4). The nature of force balance across regulate cell shape and migration (1, 4, 5). In turn, force-mediated integrin signaling also controls cell

Schwarz, Ulrich

107

Computer controllable synchronous shifting of an automatic transmission  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements. 6 figs.

Davis, R.I.; Patil, P.B.

1989-08-08T23:59:59.000Z

108

Computer controlled synchronous shifting of an automatic transmission  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements.

Davis, Roy I. (9214 Abbey La., Ypsilanti, MI 48198); Patil, Prabhakar B. (10294 W. Outer Dr., Detroit, MI 48223)

1989-01-01T23:59:59.000Z

109

Hybrid Electric Vehicle with Permanent Magnet Traction Motor: A Simulation Model  

E-Print Network (OSTI)

A simulation model for a hybrid electric vehicle is developed. Permanent magnet synchronous motor is considered for the drive part of the hybrid electric vehicle which comprises three energy sources: (i) a fuel cell, (ii) a battery bank, and (iii) a super capacitor. Rotor-oriented speed controller is designed, and also verified by simulation results, to achieve trajectory tracking requirements of the hybrid electric vehicle within the inverter voltage and current limits.

Levent U. Gkdere; Khalid Benlyazid; Enrico; Enrico Santi; Charles W. Brice; Roger A. Dougal

1999-01-01T23:59:59.000Z

110

A Precise Open-Loop Torque Control for an Interior Permanent Magnet Synchronous Motor  

E-Print Network (OSTI)

A Precise Open-Loop Torque Control for an Interior Permanent Magnet Synchronous Motor (IPMSM@lea.upb.de Abstract-Interior permanent magnet synchronous motors (IPMSM) are preferentially chosen as traction drives. INTRODUCTION Interior permanent magnet synchronous motors (IPMSM) provide high power and torque densities

Noé, Reinhold

111

VEHICLE SPECIFICATIONS Vehicle Features  

NLE Websites -- All DOE Office Websites (Extended Search)

Mazda 3 Mazda 3 VIN: JMZBLA4G601111865 Seatbelt Positions: 5 Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control Front Disc Brakes Rear Disc Brakes Front Wheel Drive Anti-Lock Brakes Traction Control Air Bags AM/FM Stereo with CD Weights Design Curb Weight: 2,954 lb Delivered Curb Weight: 2,850 lb Distribution F/R (%): 63/37 GVWR: 4,050 lb GAWR F/R: 2,057/1,896 lb Payload 1 : 1,096 lb Performance Goal: 400 lb Dimensions Wheelbase: 103.9 in Track F/R: 60.4/59.8 in Length: 175.6 in Width: 69.1 in Height: 57.9 in Ground Clearance: 6.1 in Performance Goal: 5.0 in Tires Manufacturer: Yokohama Model: YK520 Size: P205/55R17 Pressure F/R: 35/33 psi

112

VEHICLE SPECIFICATIONS Vehicle Features Base Vehicle: 2010 Smart  

NLE Websites -- All DOE Office Websites (Extended Search)

Smart Smart Fortwo MHD VIN: WME4513341K406476 Seatbelt Positions: 2 Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control Front Disc Brakes Rear Drum Brakes Rear Wheel Drive Anti-Lock Brakes Traction Control Air Bags AM/FM Stereo with CD player Weights Design Curb Weight:1,818 lb Delivered Curb Weight: 1.742 lb Distribution F/R (%):44/56 GVWR: 2,244 lb GAWR F/R: 968/1,452 lb Payload 1 : 426 lb Performance Goal: 400 lb Dimensions Wheelbase: 73.5 in Track F/R: 50.5/54.5 in Length: 106.1 in Width: 61.4 in Height: 60.7 in Ground Clearance: 6.25 in Performance Goal: 5.0 in Tires Manufacturer: Continental Model: ContiproContact Size: Front -P155/60/R15

113

A Soft-Switching Inverter for High-Temperature Advanced Hybrid Electric Vehicle Traction Motor Drives  

Science Conference Proceedings (OSTI)

The state-of-the-art hybrid electric vehicles (HEVs) require the inverter cooling system to have a separate loop to avoid power semiconductor junction over temperatures because the engine coolant temperature of 105?C does not allow for much temperature rise in silicon devices. The proposed work is to develop an advanced soft-switching inverter that will eliminate the device switching loss and cut down the power loss so that the inverter can operate at high-temperature conditions while operating at high switching frequencies with small current ripple in low inductance based permanent magnet motors. The proposed tasks also include high-temperature packaging and thermal modeling and simulation to ensure the packaged module can operate at the desired temperature. The developed module will be integrated with the motor and vehicle controller for dynamometer and in-vehicle testing to prove its superiority. This report will describe the detailed technical design of the soft-switching inverters and their test results. The experiments were conducted both in module level for the module conduction and switching characteristics and in inverter level for its efficiency under inductive and dynamometer load conditions. The performance will be compared with the DOE original specification.

None, None

2012-01-31T23:59:59.000Z

114

Study on Energy-Saving Control Strategy of Idling Stop System for City Bus  

Science Conference Proceedings (OSTI)

Fuel economy of city bus is poor, because the urban traffic is congested, the city bus is constantly in the idle condition resulting in fuel consumption is increasing. In order to improve the vehicle fuel economy and protect environment, the energy consumption ... Keywords: idling stop, energy-saving, control strategy, regenerative braking

Daxing Huang; Ren He

2010-06-01T23:59:59.000Z

115

Brief paper: Speed regulation with measured output feedback in the control of heavy haul trains  

Science Conference Proceedings (OSTI)

An approach of output regulation with measurement feedback is proposed for the control of heavy haul trains. The objective is to regulate all cars' speeds to a prescribed speed profile. The output regulation problem of nonlinear systems with measurement ... Keywords: ECP braking system, Heavy haul trains, Measured output feedback, Output regulation, Quadratic programming

X. Zhuan; X. Xia

2008-01-01T23:59:59.000Z

116

Method for controlling a motor vehicle powertrain  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission.

Burba, Joseph C. (Ypsilanti, MI); Landman, Ronald G. (Ypsilanti, MI); Patil, Prabhakar B. (Detroit, MI); Reitz, Graydon A. (Farmington Hills, MI)

1990-01-01T23:59:59.000Z

117

Method for controlling a motor vehicle powertrain  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission. 7 figs.

Burba, J.C.; Landman, R.G.; Patil, P.B.; Reitz, G.A.

1990-05-22T23:59:59.000Z

118

Hybrid powertrain controller  

DOE Patents (OSTI)

A hybrid powertrain for a vehicle comprising a diesel engine and an electric motor in a parallel arrangement with a multiple ratio transmission located on the torque output side of the diesel engine, final drive gearing connecting drivably the output shaft of transmission to traction wheels of the vehicle, and an electric motor drivably coupled to the final drive gearing. A powertrain controller schedules fuel delivered to the diesel engine and effects a split of the total power available, a portion of the power being delivered by the diesel and the balance of the power being delivered by the motor. A shifting schedule for the multiple ratio transmission makes it possible for establishing a proportional relationship between accelerator pedal movement and torque desired at the wheels. The control strategy for the powertrain maintains drivability of the vehicle that resembles drivability of a conventional spark ignition vehicle engine powertrain while achieving improved fuel efficiency and low exhaust gas emissions.

Jankovic, Miroslava (Birmingham, MI); Powell, Barry Kay (Belleville, MI)

2000-12-26T23:59:59.000Z

119

Subcontract Report: Final Report on Assessment of Motor Technologies for Traction Drives of Hybrid and Electric Vehicles (Subcontract #4000080341)  

DOE Green Energy (OSTI)

Currently, interior permanent magnet (IPM) motors with rare-earth (RE) magnets are almost universally used for hybrid and electric vehicles (EVs) because of their superior properties, particularly power density. However, there is now a distinct possibility of limited supply or very high cost of RE magnets that could make IPM motors unavailable or too expensive. Because development of electric motors is a critical part of the U.S. Department of Energy (DOE) Advanced Power Electronics and Motors activity, DOE needs to determine which options should be investigated and what barriers should be addressed. Therefore, in order to provide a basis for deciding which research topics should be pursued, an assessment of various motor technologies was conducted to determine which, if any, is potentially capable of meeting FreedomCAR 2015 and 2020 targets. Highest priority was given to IPM, surface mounted permanent magnet (SPM), induction, and switched reluctance (SR) motors. Also of interest, but with lesser emphasis, were wheel motors, multiple-rotor motors, motors with external excitation, and several others that emerged from the assessment. Cost and power density (from a design perspective, the power density criterion translates to torque density) are emerging as the two most important properties of motors for traction drives in hybrid and EVs, although efficiency and specific power also are very important. The primary approach for this assessment involved interviews with original equipment manufacturers (OEMs), their suppliers, and other technical experts. For each technology, the following issues were discussed: (1) The current state-of-the-art performance and cost; (2) Recent trends in the technology; (3) Inherent characteristics of the motor - which ones limit the ability of the technology to meet the targets and which ones aid in meeting the target; (4) What research and development (R&D) would be needed to meet the targets; and (5) The potential for the technology to meet the targets. The interviews were supplemented with information from past Oak Ridge National Laboratory (ORNL) reports, previous assessments that were conducted in 2004, and literature on magnet technology. The results of the assessment validated the DOE strategy involving three parallel paths: (1) there is enough of a possibility that RE magnets will continue to be available, either from sources outside China or from increased production in China, that development of IPM motors using RE magnets should be continued with emphasis on meeting the cost target. (2) yet the possibility that RE magnets may become unavailable or too expensive justifies efforts to develop innovative designs for permanent magnet (PM) motors that do not use RE magnets. Possible other magnets that may be substituted for RE magnets include samarium-cobalt (Sm-Co), Alnico, and ferrites. Alternatively, efforts to develop motors that do not use PMs but offer attributes similar to IPM motors also are encouraged. (3) New magnet materials using new alloys or processing techniques that would be less expensive or have comparable or superior properties to existing materials should be developed if possible. IPM motors are by far the most popular choice for hybrid and EVs because of their high power density, specific power, and constant power-speed ratio (CPSR). Performance of these motors is optimized when the strongest possible magnets - i.e., RE neodymium-iron-boron (NdFeB) magnets - are used.

Fezzler, Raymond [BIZTEK Consulting, Inc.

2011-03-01T23:59:59.000Z

120

High voltage bus and auxiliary heater control system for an electric or hybrid vehicle  

DOE Patents (OSTI)

A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary. The control system further utilizes the heater to provide a safe discharge of a bank of energy storage capacitors following disconnection of the battery or one of the high voltage connectors used to transmit high voltage operating power to the various vehicle systems. The control circuit includes a high voltage clamping circuit that monitors the voltage on the bus and operates the heater to clamp down the bus voltage when it exceeds a pre-selected maximum voltage. The control system can also be used to phase in operation of the heater when the bus voltage exceeds a lower threshold voltage and can be used to phase out the auxiliary power unit charging and regenerative braking when the battery becomes fully charged.

Murty, Balarama Vempaty (West Bloomfield, MI)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Regenerative Braking for an Electric Vehicle Using Ultracapacitors and a Buck-Boost Converter  

E-Print Network (OSTI)

-mail: jdixon@ing.puc.cl *University of Concepción Abstract An ultracapacitor bank control system and decelerations of the vehicle with minimal loss of energy, and minimal degradation of the main battery pack. The system uses an IGBT Buck-Boost converter, which is connected to the ultracapacitor bank at the Boost side

Rudnick, Hugh

122

Low cost electronic ultracapacitor interface technique to provide load leveling of a battery for pulsed load or motor traction drive applications  

DOE Patents (OSTI)

A battery load leveling arrangement for an electrically powered system in which battery loading is subject to intermittent high current loading utilizes a passive energy storage device and a diode connected in series with the storage device to conduct current from the storage device to the load when current demand forces a drop in battery voltage. A current limiting circuit is connected in parallel with the diode for recharging the passive energy storage device. The current limiting circuit functions to limit the average magnitude of recharge current supplied to the storage device. Various forms of current limiting circuits are disclosed, including a PTC resistor coupled in parallel with a fixed resistor. The current limit circuit may also include an SCR for switching regenerative braking current to the device when the system is connected to power an electric motor.

King, Robert Dean (Schenectady, NY); DeDoncker, Rik Wivina Anna Adelson (Malvern, PA)

1998-01-01T23:59:59.000Z

123

ANALYSIS OF CONTROL SYSTEMS FOR VEHICLE HYBRID POWERTRAINS  

E-Print Network (OSTI)

Abstract. Ecological and socioeconomic factors determine high interest in the development of pollution-free vehicles. At present use of electro-vehicles is suppressed by a number of technological factors. Vehicles with alternative powertrains are transitional stage between development of pollution-free vehicles and vehicles with conventional internal combustion engine. According to these aspects the investigation on conventional hybrid drives and their control systems is carried out in the article. The equations that allow evaluating effectiveness of regenerative braking for different variants of hybrid drive are given. The AMESim software is used as the modeling environment, in which models of hybrid vehicles are developed and the results of virtual simulation are analyzed. Also a number of recommendations for increasing of regenerative braking effectiveness are given.

Siarhei Kliauzovich

2007-01-01T23:59:59.000Z

124

Double acting stirling engine phase control  

DOE Patents (OSTI)

A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase between two pairs of pistons is changed by +.psi. and the phase between the other two pairs of pistons is changed by -.psi.. The phase can change beyond .psi.=90.degree. at which regenerative braking and then reversal of engine rotation occurs.

Berchowitz, David M. (Scotia, NY)

1983-01-01T23:59:59.000Z

125

High-Performance Control of Two Three-Phase Permanent-Magnet Synchronous Machines in an Integrated Drive for Automotive Applications  

SciTech Connect

The closed-loop control of an integrated dual AC drive system is presented to control two three-phase permanent-magnet motors. A five-leg inverter is employed in the drive system; three of the inverter legs are for a main traction motor, but only two are needed for a three-phase auxiliary motor by utilizing the neutral point of the traction motor. An integrated drive with reduced component count is therefore achieved by eliminating one inverter leg and its gate drivers. A modified current control scheme based on the rotor flux orientation principle is presented. Simulation and experimental results are included to verify the independent control capability of the integrated drive.

Tang, Lixin [ORNL; Su, Gui-Jia [ORNL

2008-01-01T23:59:59.000Z

126

Control of Two Permanent Magnet Machines Using a Five-Leg Inverter for Automotive Applications  

SciTech Connect

This paper presents digital control schemes for control of two permanent magnet (PM) machines in an integrated traction and air-conditioning compressor drive system for automotive applications. The integrated drive system employs a five-leg inverter to power a three-phase traction PM motor and a two-phase compressor PM motor by tying the common terminal of the two-phase motor to the neutral point of the three-phase motor. Compared to a three-phase or a standalone two-phase inverter, it eliminates one phase leg and shares the control electronics between the two drives, thus significantly reducing the component count of the compressor drive. To demonstrate that the speed and torque of the two PM motors can be controlled independently, a control strategy was implemented in a digital signal processor, which includes a rotor flux field orientation based control (RFOC) for the three-phase motor, a similar RFOC and a position sensorless control in the brushless dc (BLDC) mode for the two-phase motor. Control implementation issues unique to a two-phase PM motor are also discussed. Test results with the three-phase motor running in the ac synchronous (ACS) mode while the two-phase motor either in the ACS or the BLDC mode are included to verify the independent speed and torque control capability of the integrated drive.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL; Huang, Xianghui [GE Global Research

2006-01-01T23:59:59.000Z

127

Traction Drive Systems Breakout Group  

NLE Websites -- All DOE Office Websites (Extended Search)

cost floor to meet the 4kW (AER300) & 15kW (AER100)? * 2 - Consolidation of power module technologies will help meet cost targets * 3 - Don't overlook profit motive in...

128

Air Cooled Traction Drive Inverter  

Energy & Transportation Science Division Licensing Contact SIMS, DAVID L UT-Battelle, LLC Oak Ridge National Laboratory Rm 124C, Bldg 4500N, MS: ...

129

Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

E27C177982 Vehicle Specifications Engine: 2.5 L 4-cylinder Electric Motor: 105 kW Battery: NiMH Seatbelt Positions: Five Payload: 981 lbs Features: Regenerative braking Traction...

130

VIN# JHMZE2H59AS011748 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

H59AS011748 Vehicle Specifications Engine: 1.3 L 4-cylinder Electric Motor: 10 kW Battery: NiMH Seatbelt Positions: Five Payload: 907 lbs Features: Regenerative braking Traction...

131

VIN# KMHEC4A43BA004932 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

3BA004932 Vehicle Specifications Engine: 2.4 L Electric Motor: 30 kW Battery: Lithium Polymer Seatbelt Positions: Five Payload: 1074 lbs Features: Regenerative braking Traction...

132

Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

E87C172351 Vehicle Specifications Engine: 2.5 L 4-cylinder Electric Motor: 105 kW Battery: NiMH Seatbelt Positions: Five Payload: 981 lbs Features: Regenerative braking Traction...

133

Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

2AR194699 Vehicle Specifications Engine: 2.5 L 4-cylinder Electric Motor: 60 kW Battery: NiMH Seatbelt Positions: Five Payload: 850 lbs Features: Regenerative braking Traction...

134

VIN# JHMZE2H78AS010141 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

H78AS010141 Vehicle Specifications Engine: 1.3 L 4-cylinder Electric Motor: 10 kW Battery: NiMH Seatbelt Positions: Five Payload: 907 lbs Features: Regenerative braking Traction...

135

Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

4AR144757 Vehicle Specifications Engine: 2.5 L 4-cylinder Electric Motor: 60 kW Battery: NiMH Seatbelt Positions: Five Payload: 850 lbs Features: Regenerative braking Traction...

136

VIN# JTDKN3DU5A0006063 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

DU5A0006063 Vehicle Specifications Engine: 1.8 L 4-cylinder Electric Motor: 60 kW Battery: NiMH Seatbelt Positions: Five Payload: 885 lbs Features: Regenerative braking Traction...

137

VIN# JTDKN3DU2A5010462 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

DU2A5010462 Vehicle Specifications Engine: 1.8 L 4-cylinder Electric Motor: 60 kW Battery: NiMH Seatbelt Positions: Five Payload: 885 lbs Features: Regenerative braking Traction...

138

VIN# KMHEC4A47BA003539 Vehicle Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

7BA003539 Vehicle Specifications Engine: 2.4 L Electric Motor: 30 kW Battery: Lithium Polymer Seatbelt Positions: Five Payload: 1074 lbs Features: Regenerative braking Traction...

139

Near-term electric vehicle program. Phase II. Operation and maintenance manual  

DOE Green Energy (OSTI)

A detailed description of the design, operation, and maintenance of the Integrated Test Vehicle (ITV) including instruments and controls, economy, safety and security, troubleshooting, and specifications is given. The ITV employs a dc traction motor and 18 lead-acid batteries which provide a nominal voltage of 108 Vdc. A microcomputer controls many vehicle electrical functions. The ITV is a four-passenger subcompact weighing 3320 lb curb weight with the capacity of carrying a 600 lb payload. The driving range is 75 miles on urban cycle, and the vehicle is equipped with a regenerative braking system. (WHK)

Not Available

1979-11-01T23:59:59.000Z

140

Experimental Approach of a High Performance Control of Two PermanentMagnet Synchronous Machines in an Integrated Drive for Automotive Applications  

SciTech Connect

The close-loop digital signal processor (DSP) control of an integrated-dual inverter, which is able to drive two permanent magnet (PM) motors independently, is presented and evaluated experimentally. By utilizing the neutral point of the main traction motor, only two inverter poles are needed for the two-phase auxiliary motor. The modified field-oriented control scheme for this integrated inverter was introduced and employed in real-time control. The experimental results show the inverter is able to control two drives independently. An integrated, component count reduced drive is achieved.

Tang, Lixin [ORNL; Su, Gui-Jia [ORNL

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Control system design for a parallel hybrid electric vehicle  

E-Print Network (OSTI)

This thesis addresses the design of control systems for a parallel hybrid electric drive train which is an alternative to conventional passenger vehicles. The principle components of the drive train are a small internal combustion engine and an electric machine. In the parallel configuration, both devices can apply torque directly to the drive shaft for propelling the vehicle. A low order drive train model is developed which is used during the controller design and overall system simulations. The model is composed of sub-models for the engine, mechanical brake, electric machine, converter, battery, drive shaft with gears, and road load with wind resistance. The model yields results which are rough approximations of component performance and are appropriate for a top level drive train control study. In order to mimic the controls of a conventional car, the hybrid vehicle controller must insure that the torque command given by the user through the accelerator and brake pedal is tracked by the hybrid drive train without error. In this thesis two control systems are designed which enable the drive train to emulate conventional vehicle performance by meeting torque commands. The first control design maximizes the battery state-of-charge by minimizing the torque contribution of the electric machine. The second control design includes a cost parameter allowing the user to specify the appropriate tradeoff between a high state-of-charge and increased fuel savings. Simulation results verify that both controllers achieve the design objectives. Results also suggest that under proper control the parallel hybrid drive train can offer equal performance and range to a conventional passenger vehicle with improved fuel efficiency and reduced emissions.

Buntin, David Leighton

1994-01-01T23:59:59.000Z

142

Reactivity Controlled Compression Ignition (RCCI) Combustion on a Multi-Cylinder Light-Duty Diesel Engine  

Science Conference Proceedings (OSTI)

Reactivity controlled compression ignition is a low-temperature combustion technique that has been shown, both in computational fluid dynamics modeling and single-cylinder experiments, to obtain diesel-like efficiency or better with ultra-low nitrogen oxide and soot emissions, while operating primarily on gasoline-like fuels. This paper investigates reactivity controlled compression ignition operation on a four-cylinder light-duty diesel engine with production-viable hardware using conventional gasoline and diesel fuel. Experimental results are presented over a wide speed and load range using a systematic approach for achieving successful steady-state reactivity controlled compression ignition combustion. The results demonstrated diesel-like efficiency or better over the operating range explored with low engine-out nitrogen oxide and soot emissions. A peak brake thermal efficiency of 39.0% was demonstrated for 2600 r/min and 6.9 bar brake mean effective pressure with nitrogen oxide emissions reduced by an order of magnitude compared to conventional diesel combustion operation. Reactivity controlled compression ignition emissions and efficiency results are compared to conventional diesel combustion operation on the same engine.

Curran, Scott [ORNL; Hanson, Reed M [ORNL; Wagner, Robert M [ORNL

2012-01-01T23:59:59.000Z

143

Efficient high density train operations  

DOE Patents (OSTI)

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference. During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P. (Oakland, CA); Evans, John A. (Hayward, CA)

2001-01-01T23:59:59.000Z

144

Control system for an interior permanent magnet synchronous machine  

DOE Patents (OSTI)

A high performance, fully operational, four-quadrant control scheme is used in an interior permanent magnet synchronous machine. The machine operates smoothly with full performance in the constant-torque region as well as in the flux-weakening, constant-power region in both directions of motion. The transition between the constant-torque and constant-power regions is very smooth under all conditions of operation. Control in the constant-torque region is based on a vector or field-oriented technique, with the direct-axis aligned with the total stator flux, whereas constant-power region control is accomplished by orientation of the torque angle of the impressed square-wave voltage through the feedforward vector rotator. In a preferred embodiment, the control system employs a digital distributed microcomputer controller arrangement which relies upon various precisely estimated feedback signals, such as torque, flux, etc. The control scheme includes an outer torque control loop primarily for traction type applications, but also contemplates speed and position control loops for various industrial drives. A 70 hp drive system using a Neodymium-Iron-Boron permanent magnet machine and transistor pulse width modulating inverter has been designed and successfully tested. This control scheme also has application in controlling surface permanent magnet machines. 16 figs.

Bose, B.K.

1988-10-12T23:59:59.000Z

145

Mechanical and Hydraulic Press Brakes  

Science Conference Proceedings (OSTI)

...drives, with mechanical linkages from motor to flywheel to clutch to gears to crankshaft to crank arm to ram (Fig. 4). They all have one thing in common: a crankshaft action that converts rotary motion into straight, reciprocating motion (Fig. 5). During a stroke cycle, the crank arm drives the ram down...

146

Advanced Underground Vehicle Power and Control Fuelcell Mine Locomotive  

E-Print Network (OSTI)

-- Tethered -- Diesel -- Battery · Solution by fuelcells will provide cost offsets -- Lower recurring costs -- Higher availability -- Lower ventilation costs A PROBLEM AND OPPORTUNITY Underground Traction Power #12 available battery-powered 4-ton locomotive · Remove traction battery module and use existing electric drive

147

Control for transient response of turbocharged engines  

E-Print Network (OSTI)

earlier. Future challenges include reducing emissions at affordable costs, low running costs and limited crude oil resources. Electric (EV) and hybrid electric vehicles (HEV) are often considered as the most promising alternatives. Wider acceptance of pure... heats for dry air ? air-fuel equivalence ratio / eigenvalue ? optimisation cost function ? density ? time constant ? temperature Subscripts a pre-compressor act actual ad air drag air air amb ambient B brake / shaft b post-compressor brk braking c fuel...

Cieslar, Dariusz

2013-07-09T23:59:59.000Z

148

Method and apparatus for controlling battery charging in a hybrid electric vehicle  

DOE Green Energy (OSTI)

A starter/alternator system (24) for hybrid electric vehicle (10) having an internal combustion engine (12) and an energy storage device (34) has a controller (30) coupled to the starter/alternator (26). The controller (30) has a state of charge manager (40) that monitors the state of charge of the energy storage device. The controller has eight battery state-of-charge threshold values that determine the hybrid operating mode of the hybrid electric vehicle. The value of the battery state-of-charge relative to the threshold values is a factor in the determination of the hybrid mode, for example; regenerative braking, charging, battery bleed, boost. The starter/alternator may be operated as a generator or a motor, depending upon the mode.

Phillips, Anthony Mark (Northville, MI); Blankenship, John Richard (Dearborn, MI); Bailey, Kathleen Ellen (Dearborn, MI); Jankovic, Miroslava (Birmingham, MI)

2003-06-24T23:59:59.000Z

149

CONCEPTUAL DESIGN AND OPTIMAL POWER CONTROL STRATEGY FOR AN ECO?FRIENDLY HYBRID VEHICLE  

Science Conference Proceedings (OSTI)

This paper presents a new concept for a hybrid vehicle using a torque and speed splitting technique. It is implemented by the newly developed controller in combination with a two degree of freedom epicyclic gear transmission. This approach enables optimization of the power split between the less powerful electrical motor and more powerful engine while driving a car load. The power split is fundamentally a dual?energy integration mechanism as it is implemented by using the epicyclic gear transmission that has two inputs and one output for a proper power distribution. The developed power split control system manages the operation of both the inputs to have a known output with the condition of maintaining optimum operating efficiency of the internal combustion engine and electrical motor. This system has a huge potential as it is possible to integrate all the features of hybrid vehicle known to?date such as the regenerative braking system

N. Mir Nasiri; Frederick T. A. Chieng

2011-01-01T23:59:59.000Z

150

Quantifying cellular traction forces in three dimensions  

E-Print Network (OSTI)

of the gels. Analysis of the normal displacement profiles suggests that normal forces play important roles-dimensional (2-D) analysis and interpretation of cell-matrix interactions. Furthermore, these approaches cal allows a more complete analysis of cellular forces than does consideration of only in-plane (2-D

Stein, Derek

151

Intelligent Cruise Control design based on a traffic flow specification  

E-Print Network (OSTI)

The principal objectives of the Automated Highway graphics. System (AHS), an Intelligent Transportation System (ITS) technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control Systems (AVCS) play a key role in traffic automation. Central to the Development of AVCS for vehicles is the design of an Intelligent Cruise Control (ICC) system that automates the task of maintaining a safe following distance. A properly designed ICC system has the potential to smooth traffic flows and increase the traffic flow capacity of the existing highway. Near term applications of AVCS cannot rely on communication between vehicles to maintain a safe following system. In an Autonomous Intelligent Cruise Control (AICC) Systems, the throttle and brake are controlled by a computer based on onboard sensory information, and the steering task is manually controlled. AICC systems proposed so far do not consider their impact on the traffic flow stability. In this thesis, an AICC system is synthesized from a traffic flow specification on stability and capacity. Analytical results of this thesis are verified by numerical simulations.

Huandra, Rusli

1998-01-01T23:59:59.000Z

152

Fuel Cell Powered Vehicles Using Supercapacitors: Device Characteristics, Control Strategies, and Simulation Results  

E-Print Network (OSTI)

and the recaptured regenerative energy are completely offsetincrease of captured regenerative energy, and will slightlythe capture of regenerative braking energy, which will

Zhao, Hengbing; Burke, Andy

2010-01-01T23:59:59.000Z

153

Optimized control studies of a parallel hybrid electric vehicle  

E-Print Network (OSTI)

This thesis addresses the development of a control scheme to maximize automobile fuel economy and battery state-of-charge (SOC) while meeting exhaust emission standards for parallel hybrid electric vehicles, which are an alternative to conventional passenger vehicles. The principle components of the drive train are a small internal combustion engine and an electric motor, both of them applying torque directly to the drive shaft for propelling the vehicle. Each component of the parallel hybrid vehicle is modeled, and throttle angle, motor current and brake torque command chosen as the control inputs. A performance index describing the total fuel and battery charge used, as well as pollutants emitted over the federal drive cycle, is defined. The problem is to find the optimal control inputs, as a function of time, that minimize the performance index under the chosen drive cycle while satisfying lower and upper bounds on the controls as well as the torque command constraint, derived from the drive cycle speed that the vehicle must follow. The problem is formulated so that optimal control theory can be used by defining the Hamiltonian of the system and deriving the Euler-Lagrange equations. Four special cases for the control bounds which are of practical importance are considered. But, because of the complicated analytical derivatives, solving the general analytical problem is not tractable. The alternate approach that is chosen is a numerical optimization method that solves the constrained optimization problem using the Recursive Quadratic Programming Method.'To evaluate various control schemes, a set of selected performance measures are studied: only SOC performance, and balanced fuel and SOC performance. Simulations under the federal drive cycle show that we achieve the design objectives while getting better results than with a simple logic controller. The optimum control results suggest that the throttle should always be kept wide open for the SOC to be maximized. This should be accomplished with Buntin's logic controller and would allow us to keep his easy control implementation while improving his performance.

Bougler, Benedicte Bernadette

1995-01-01T23:59:59.000Z

154

Speed Control in Industrial Refrigeration: Theory, Application & Case Studies  

E-Print Network (OSTI)

It is often standard practice in the field of industrial refrigeration to design and operate systems with little regard toward part-load performance. This approach is understandable, whether viewed from the standpoint of the design engineer, plant manager or chief operator. As long a space temperature and production rates are maintained during peak periods, the refrigeration system is viewed as operating "correctly". The truth is, most refrigeration systems spend some, if not most operating hours at reduced capacity. Screw compressors back off slide valves, evaporator coils utilize back-pressure regulators (BPRs) or liquid solenoids, and condensers cycle fans. Unfortunately, these control methods do not provide the maximum attainable reduction in brake horsepower (BHP) as refrigeration capacity is reduced. This paper will discuss the application of variable speed drive (VSD, also called "variable frequency drive", "adjustable speed drive", "inverter", or simply "freq. drive") technology to capacity control of screw compressors, evaporator fans, and condenser fans. As shown through theory and case study, speed control of these components provides maximum flexibility, control and energy efficiency.

Wilcox, M. H.

1995-04-01T23:59:59.000Z

155

Final Report on Control Algorithm to Improve the Partial-Load Efficiency of Surface PM Machines with Fractional-Slot Concentrated Windings  

DOE Green Energy (OSTI)

Surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings are being investigated as candidates for high-performance traction machines for automotive electric propulsion systems. It has been shown analytically and experimentally that such designs can achieve very wide constant-power speed ratios (CPSR) [1,2]. This work has shown that machines of this type are capable of achieving very low cogging torque amplitudes as well as significantly increasing the machine power density [3-5] compared to SPM machines using conventional distributed windings. High efficiency can be achieved in this class of SPM machine by making special efforts to suppress the eddy-current losses in the magnets [6-8], accompanied by efforts to minimize the iron losses in the rotor and stator cores. Considerable attention has traditionally been devoted to maximizing the full-load efficiency of traction machines at their rated operating points and along their maximum-power vs. speed envelopes for higher speeds [9,10]. For example, on-line control approaches have been presented for maximizing the full-load efficiency of PM synchronous machines, including the use of negative d-axis stator current to reduce the core losses [11,12]. However, another important performance specification for electric traction applications is the machine's efficiency at partial loads. Partial-load efficiency is particularly important if the target traction application requires long periods of cruising operation at light loads that are significantly lower than the maximum drive capabilities. While the design of the machine itself is clearly important, investigation has shown that this is a case where the choice of the control algorithm plays a critical role in determining the maximum partial-load efficiency that the machine actually achieves in the traction drive system. There is no evidence that this important topic has been addressed for this type of SPM machine by any other authors. This topic takes on even greater significance for fractional-slot concentrated-winding SPM machine designs. In particular, maximizing the torque/power density of this class of SPM machines typically leads to machine designs with high numbers of poles. The resulting high electrical frequencies can easily result in high stator core losses unless special care is taken during the machine design process. The purpose of this report is to discuss a modified vector control algorithm for a fractional-slot concentrated winding SPM machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. For purposes of this discussion, a 55 kW (peak) SPM machine designed to meet requirements established in the US FreedomCar program [13] is used as the basis for demonstrating the proposed technique. A combination of closed-form analysis [14] and finite element analysis (FEA) is used during this investigation.

McKeever, John W [ORNL; Reddy, Patel [University of Wisconsin; Jahns, Thomas M [ORNL

2007-05-01T23:59:59.000Z

156

FINAL REPORT ON CONTROL ALGORITHM TO IMPROVE THE PARTIAL-LOAD EFFICIENCY OFSURFACE PM MACHINES WITH FRACTIONAL-SLOT CONCENTRATED WINDINGS  

SciTech Connect

Surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings are being investigated as candidates for high-performance traction machines for automotive electric propulsion systems. It has been shown analytically and experimentally that such designs can achieve very wide constant-power speed ratios (CPSR) [1,2]. This work has shown that machines of this type are capable of achieving very low cogging torque amplitudes as well as significantly increasing the machine power density [3-5] compared to SPM machines using conventional distributed windings. High efficiency can be achieved in this class of SPM machine by making special efforts to suppress the eddy-current losses in the magnets [6-8], accompanied by efforts to minimize the iron losses in the rotor and stator cores. Considerable attention has traditionally been devoted to maximizing the full-load efficiency of traction machines at their rated operating points and along their maximum-power vs. speed envelopes for higher speeds [9,10]. For example, on-line control approaches have been presented for maximizing the full-load efficiency of PM synchronous machines, including the use of negative d-axis stator current to reduce the core losses [11,12]. However, another important performance specification for electric traction applications is the machine's efficiency at partial loads. Partial-load efficiency is particularly important if the target traction application requires long periods of cruising operation at light loads that are significantly lower than the maximum drive capabilities. While the design of the machine itself is clearly important, investigation has shown that this is a case where the choice of the control algorithm plays a critical role in determining the maximum partial-load efficiency that the machine actually achieves in the traction drive system. There is no evidence that this important topic has been addressed for this type of SPM machine by any other authors. This topic takes on even greater significance for fractional-slot concentrated-winding SPM machine designs. In particular, maximizing the torque/power density of this class of SPM machines typically leads to machine designs with high numbers of poles. The resulting high electrical frequencies can easily result in high stator core losses unless special care is taken during the machine design process. The purpose of this report is to discuss a modified vector control algorithm for a fractional-slot concentrated winding SPM machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. For purposes of this discussion, a 55 kW (peak) SPM machine designed to meet requirements established in the US FreedomCar program [13] is used as the basis for demonstrating the proposed technique. A combination of closed-form analysis [14] and finite element analysis (FEA) is used during this investigation.

Reddy, P.B.; Jahns, T.M.

2007-04-30T23:59:59.000Z

157

Dream controller  

SciTech Connect

A method and apparatus for intelligently controlling continuous process variables. A Dream Controller comprises an Intelligent Engine mechanism and a number of Model-Free Adaptive (MFA) controllers, each of which is suitable to control a process with specific behaviors. The Intelligent Engine can automatically select the appropriate MFA controller and its parameters so that the Dream Controller can be easily used by people with limited control experience and those who do not have the time to commission, tune, and maintain automatic controllers.

Cheng, George Shu-Xing; Mulkey, Steven L; Wang, Qiang; Chow, Andrew J

2013-11-26T23:59:59.000Z

158

Service- and energy-related optimization of advanced automatic train control  

DOE Green Energy (OSTI)

The Bay Area Rapid Transit (BART) system, in collaboration with Hughes Aircraft Company and Harmon Industries, is in the process of developing an Advanced Automatic Train Control (AATC) system to replace the current fixed-block automatic system. As in the current ATC system, the trains will be controlled by station computers at the wayside; however, spread-spectrum radios rather than track-circuits will be employed to determine train locations and reliably transfer control information, allowing for finer speed and acceleration control, as well as more precise train locating capabilities and moving-block control. The authors have developed a simulator of the train control and power consumption of the AATC system, and are now employing this tool to develop enhanced train control algorithms to supplement the safety-critical controller. These algorithms do not attempt to globally optimize the control system with respect to a cost function, but rather they modify the baseline vital control to smooth the train trajectories, and to reduce energy consumption and power infrastructure requirements, through coordination of multiple trains. Several control algorithms are under development, including (1) delay recovery, which smoothly and efficiently controls trains approaching and stopped behind a delayed train, (2) interference management, which controls closely-following trains to avoid oscillatory brake/acceleration cycles, and (3) low voltage avoidance, which limits power consumption by multiple trains in an area to prevent low voltage events. The authors discuss progress to date on development of these control algorithms, as well as their service- and energy-related benefits.

Gordon, S.P. [Sandia National Labs., Livermore, CA (United States); Lehrer, D.G. [Bay Area Rapid Transit District, Oakland, CA (United States)

1998-05-01T23:59:59.000Z

159

AVESTAR® - Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Control Control AVESTAR control system efforts are focused on development of computational approaches for simulation and advanced controls for energy systems. Power generation technologies are growing more sophisticated and require control strategies and systems to be updated to allow plant owners to take full advantage of their increased capabilities. A well designed control system can provide the ability to hit and maintain setpoints without oscillation for optimum power plant operation. Implementation of complex control systems developed through advanced computational approaches will increase efficiency and reduce emissions. The AVESTAR team is focusing on the following three areas of process control research: 1) Plant-wide control system design, 2) Advanced regulatory control, and 3) Advanced process control. Process control models, methods, and tools are developed and applied to a wide variety of energy systems ranging from smart plant to smart grid.

160

Gas turbine engine braking and method  

SciTech Connect

A method is described of decelerating a ground vehicle driven by a gas turbine engine having a gas generator section and a free turbine output power section driven by a gas flow from the gas generator section, comprising the steps of: altering the incidence of gas flow from the gas generator section onto the free turbine section whereby said gas flow opposes rotation of the free turbine section; increasing gas generator section speed; and subsequent to said altering and increasing steps, selectively mechanically interconnecting said gas generator and free turbine sections whereby the rotational inertia of the gas generator section tends to decelerate the free turbine section.

Mattson, G.; Woodhouse, G.

1980-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Lighting Group: Controls: Wireless Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Wireless Controls Wireless Lighting Control System (with DUST Networks) Objective The project objectives are to: 1. Demonstrate that wireless technology can be cost-effectively...

162

Real Time Flux Control in PM Motors  

SciTech Connect

Significant research at the Oak Ridge National Laboratory (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) is being conducted to develop ways to increase (1) torque, (2) speed range, and (3) efficiency of traction electric motors for hybrid electric vehicles (HEV) within existing current and voltage bounds. Current is limited by the inverter semiconductor devices' capability and voltage is limited by the stator wire insulation's ability to withstand the maximum back-electromotive force (emf), which occurs at the upper end of the speed range. One research track has been to explore ways to control the path and magnitude of magnetic flux while the motor is operating. The phrase, real time flux control (RTFC), refers to this mode of operation in which system parameters are changed while the motor is operating to improve its performance and speed range. RTFC has potential to meet an increased torque demand by introducing additional flux through the main air gap from an external source. It can augment the speed range by diverting flux away from the main air gap to reduce back-emf at high speeds. Conventional RTFC technology is known as vector control [1]. Vector control decomposes the stator current into two components; one that produces torque and a second that opposes (weakens) the magnetic field generated by the rotor, thereby requiring more overall stator current and reducing the efficiency. Efficiency can be improved by selecting a RTFC method that reduces the back-emf without increasing the average current. This favors methods that use pulse currents or very low currents to achieve field weakening. Foremost in ORNL's effort to develop flux control is the work of J. S. Hsu. Early research [2,3] introduced direct control of air-gap flux in permanent magnet (PM) machines and demonstrated it with a flux-controlled generator. The configuration eliminates the problem of demagnetization because it diverts all the flux from the magnets instead of trying to oppose it. It is robust and could be particularly useful for PM generators and electric vehicle drives. Recent efforts have introduced a brushless machine that transfers a magneto-motive force (MMF) generated by a stationary excitation coil to the rotor [4]. Although a conventional PM machine may be field weakened using vector control, the air-gap flux density cannot be effectively enhanced. In Hsu's new machine, the magnetic field generated by the rotor's PM may be augmented by the field from the stationery excitation coil and channeled with flux guides to its desired destination to enhance the air-gap flux that produces torque. The magnetic field can also be weakened by reversing the current in the stationary excitation winding. A patent for advanced technology in this area is pending. Several additional RTFC methods have been discussed in open literature. These include methods of changing the number of poles by magnetizing and demagnetizing the magnets poles with pulses of current corresponding to direct-axis (d-axis) current of vector control [5,6], changing the number of stator coils [7], and controlling the air gap [8]. Test experience has shown that the magnet strengths may vary and weaken naturally as rotor temperature increases suggesting that careful control of the rotor temperature, which is no easy task, could yield another method of RTFC. The purpose of this report is to (1) examine the interaction of rotor and stator flux with regard to RTFC, (2) review and summarize the status of RTFC technology, and (3) compare and evaluate methods for RTFC with respect to maturity, advantages and limitations, deployment difficulty and relative complexity.

Otaduy, P.J.

2005-09-27T23:59:59.000Z

163

Control System Design and Transmission Line Resonance Elimination of a 3-Phase Battery Charger.  

E-Print Network (OSTI)

??This paper addresses two problems which may occur during the operation of a MTM-HF traction battery charger produced by the company MicroPower AB: Firstly, high-power (more)

Barela, Krzysztof

2012-01-01T23:59:59.000Z

164

Motor generator electric automotive vehicle  

SciTech Connect

A motor generator electric automotive vehicle is described comprising in combination, a traction drive motor coupled by a first drive shaft to a differential of an axle of the vehicle, a main battery bank electrically connected by wires to a small electric motor driving a large D.C. generator having a second drive shaft therebetween, an on-off switch in series with one of the wires to the small motor, a speed control unit attached to an accelerator pedal of the vehicle being coupled with a double pole-double throw reverse switch to the traction drive motor, a charger regulator electrically connected to the generator, a bank of solar cells coupled to the charge regulator, an electric extension cord from the charge regulator having a plug on its end for selective connection to an exterior electric power source, a plurality of pulleys on the second drive shaft, a belt unit driven by the pulley, one the belt unit being connected to a present alternator of the vehicle which is coupled to a present battery and present regulator of the vehicle, and other of the units being connected to power brakes and equipment including power steering and an air conditioner.

Weldin, W.

1986-07-29T23:59:59.000Z

165

Institutional Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Institutional Controls Institutional Controls Many major Federal laws (e.g., Atomic Energy Act (AEA), Resource Conservation Recovery Act (RCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)), Executive Orders, regulations and various other drivers influence the use of institutional controls at DOE sites. Some drivers directly authorize or require the use of institutional controls, while others do not. DOE also uses institutional controls when no specific statutory requirement exists to supplement active remediation, pollution control, public and resource protection, and physical security, or to bolster the integrity of engineered remedies. DOE and its predecessor agencies have conducted activities for over 50 years, using land ownership and access control, environmental monitoring and surveillance, and other tools to support protection efforts at operational and inactive facilities, including radioactive waste burial grounds.

166

Experimental Investigation of Fuel-Reactivity Controlled Compression Ignition (RCCI) Combustion Mode in a Multi-Cylinder, Light-Duty Diesel Engine  

DOE Green Energy (OSTI)

An experimental study was performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (RCCI) combustion mode utilizing dual-fuel approach in a light-duty, multi-cylinder diesel engine. In-cylinder fuel blending using port fuel injection of gasoline before intake valve opening (IVO) and early-cycle, direct injection of diesel fuel was used as the charge preparation and fuel blending strategy. In order to achieve the desired auto-ignition quality through the stratification of the fuel-air equivalence ratio ( ), blends of commercially available gasoline and diesel fuel were used. Engine experiments were performed at an engine speed of 2300rpm and an engine load of 4.3bar brake mean effective pressure (BMEP). It was found that significant reduction in both nitrogen oxide (NOx) and particulate matter (PM) was realized successfully through the RCCI combustion mode even without applying exhaust gas recirculation (EGR). However, high carbon monoxide (CO) and hydrocarbon (HC) emissions were observed. The low combustion gas temperature during the expansion and exhaust processes seemed to be the dominant source of high CO emissions in the RCCI combustion mode. The high HC emissions during the RCCI combustion mode could be due to the increased combustion quenching layer thickness as well as the -stratification at the periphery of the combustion chamber. The slightly higher brake thermal efficiency (BTE) of the RCCI combustion mode was observed than the other combustion modes, such as the conventional diesel combustion (CDC) mode, and single-fuel, premixed charge compression ignition (PCCI) combustion mode. The parametric study of the RCCI combustion mode revealed that the combustion phasing and/or the peak cylinder pressure rise rate of the RCCI combustion mode could be controlled by several physical parameters premixed ratio (rp), intake swirl intensity, and start of injection (SOI) timing of directly injected fuel unlike other low temperature combustion (LTC) strategies.

Cho, Kukwon [ORNL; Curran, Scott [ORNL; Prikhodko, Vitaly Y [ORNL; Sluder, Scott [ORNL; Parks, II, James E [ORNL; Wagner, Robert M [ORNL

2011-01-01T23:59:59.000Z

167

Parameter Estimation and Supervisory Techniques for Robust Longitudinal Control of Heavy Vehicles  

E-Print Network (OSTI)

plot) and brake pressure in Volt at the front left wheel (fuel circuit is below 0.5 Volt). Although the actuators can,command (between 0 and 10 Volt), they were limited within a

Druzhinina, Maria; Moklegaard, Lasse; Stefanopoulou, Anna G.

2003-01-01T23:59:59.000Z

168

Renewable source controls for grid stability.  

SciTech Connect

The goal of this study was to evaluate the small signal and transient stability of the Western Electric- ity Coordinating Council (WECC) under high penetrations of renewable energy, and to identify control technologies that would improve the system performance. The WECC is the regional entity responsible for coordinating and promoting bulk electric system reliability in the Western Interconnection. Transient stability is the ability of the power system to maintain synchronism after a large disturbance while small signal stability is the ability of the power system to maintain synchronism after a small disturbance. Tran- sient stability analysis usually focuses on the relative rotor angle between synchronous machines compared to some stability margin. For this study we employed generator speed relative to system speed as a metric for assessing transient stability. In addition, we evaluated the system transient response using the system frequency nadir, which provides an assessment of the adequacy of the primary frequency control reserves. Small signal stability analysis typically identi es the eigenvalues or modes of the system in response to a disturbance. For this study we developed mode shape maps for the di erent scenarios. Prony analysis was applied to generator speed after a 1.4 GW, 0.5 second, brake insertion at various locations. Six di erent WECC base cases were analyzed, including the 2022 light spring case which meets the renewable portfolio standards. Because of the di culty in identifying the cause and e ect relationship in large power system models with di erent scenarios, several simulations were run on a 7-bus, 5-generator system to isolate the e ects of di erent con gurations. Based on the results of the study, for a large power system like the WECC, incorporating frequency droop into wind/solar systems provides a larger bene t to system transient response than replacing the lost inertia with synthetic inertia. From a small signal stability perspective, the increase in renewable penetration results in subtle changes to the system modes. In gen- eral, mode frequencies increase slightly, and mode shapes remain similar. The system frequency nadir for the 2022 light spring case was slightly lower than the other cases, largely because of the reduced system inertia. However, the nadir is still well above the minimum load shedding frequency of 59.5 Hz. Finally, several discrepancies were identi ed between actual and reported wind penetration, and additional work on wind/solar modeling is required to increase the delity of the WECC models.

Byrne, Raymond Harry; Elliott, Ryan Thomas; Neely, Jason C.; Silva Monroy, Cesar Augusto; Schoenwald, David Alan; Grant, Lisa

2012-12-01T23:59:59.000Z

169

Load Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visualization and Controls Peer Review Visualization and Controls Peer Review Load Control for System Reliability and Measurement-Based Stability Assessment Dan Trudnowski, PhD, PE Montana Tech Butte, MT 59701 dtrudnowski@mtech.edu 406-496-4681 October 2006 2 Presentation Outline * Introduction - Goals, Enabling technologies, Overview * Load Control - Activities, Status * Stability Assessment - Activities, Status * Wrap up - Related activities, Staff 3 Goals * Research and develop technologies to improve T&D reliability * Technologies - Real-time load control methodologies - Measurement-based stability-assessment 4 Enabling Technologies * Load control enabled by GridWise technology (e.g. PNNL's GridFriendly appliance) * Real-time stability assessment enabled by Phasor Measurement (PMU) technology 5 Project Overview * Time line: April 18, 2006 thru April 17, 2008

170

Smoke Control  

Science Conference Proceedings (OSTI)

... This was followed by the idea of the pressure sand- wich, ie, venting or exhausting the fire floor ... Smoke control is less dependent on tight barriers. ...

1996-08-14T23:59:59.000Z

171

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TERMSDEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated...

172

CONTROL ROD  

DOE Patents (OSTI)

This patent shows a method of making a fuel or control rod for a nuclear reactor. Fuel or control material is placed within a tube and plugs of porous metal wool are inserted at both ends. The metal wool is then compacted and the tube compressed around it as by swaging, thereby making the plugs liquid- impervious but gas-pervious. (AEC)

Walker, D.E.; Matras, S.

1963-04-30T23:59:59.000Z

173

Effectiveness of Diesel Oxidation Catalyst in Reducing HC and CO Emissions from Reactivity Controlled Compression Ignition  

SciTech Connect

Reactivity Controlled Compression Ignition (RCCI) has been shown to allow for diesel-like or better brake thermal efficiency with significant reductions in nitrogen oxide (NOX) particulate matter (PM) emissions. Hydrocarbon (HC) and carbon monoxide (CO) emission levels, on the other hand, are similar to those of port fuel injected gasoline engines. The higher HC and CO emissions combined with the lower exhaust temperatures with RCCI operation present a challenge for current exhaust aftertreatments. The reduction of HC and CO emissions in a lean environment is typically achieved with an oxidation catalyst. In this work, several diesel oxidation catalysts (DOC) with different precious metal loadings were evaluated for effectiveness to control HC and CO emissions from RCCI combustion in a light-duty multi-cylinder engine operating on gasoline and diesel fuels. Each catalyst was evaluated in a steady-state engine operation with temperatures ranging from 160 to 260 C. A shift to a higher light-off temperature was observed during the RCCI operation. In addition to the steady-state experiments, the performances of the DOCs were evaluated during multi-mode engine operation by switching from diesel-like combustion at higher exhaust temperature and low HC/CO emissions to RCCI combustion at lower temperature and higher HC/CO emissions. High CO and HC emissions from RCCI generated an exotherm keeping the catalyst above the light-off temperature.

Prikhodko, Vitaly Y [ORNL; Curran, Scott [ORNL; Parks, II, James E [ORNL; Wagner, Robert M [ORNL

2013-01-01T23:59:59.000Z

174

REACTOR CONTROL  

DOE Patents (OSTI)

A control system employed with a high pressure gas cooled reactor in which a control rod is positioned for upward and downward movement into the neutron field from a position beneath the reactor is described. The control rod is positioned by a coupled piston cylinder releasably coupled to a power drive means and the pressurized coolant is directed against the lower side of the piston. The coolant pressure is offset by a higher fiuid pressure applied to the upper surface of the piston and means are provided for releasing the higher pressure on the upper side of the piston so that the pressure of the coolant drives the piston upwardly, forcing the coupled control rod into the ncutron field of the reactor. (AEC)

Fortescue, P.; Nicoll, D.

1962-04-24T23:59:59.000Z

175

FANS - Control  

Science Conference Proceedings (OSTI)

... If set to H+ and a magnet controller is connected, you are ... Typically motors 3, 4, 5, and 6 are fixed for FANS operation A fixed motor will not be ...

176

CONTROL SYSTEM  

DOE Patents (OSTI)

A boiling water type nuclear reactor power system having improved means of control is described. These means include provisions for either heating the coolant-moderator prior to entry into the reactor or shunting the coolantmoderator around the heating means in response to the demand from the heat engine. These provisions are in addition to means for withdrawing the control rods from the reactor. (AEC)

Shannon, R.H.; Williamson, H.E.

1962-10-30T23:59:59.000Z

177

Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control  

SciTech Connect

The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.

Lawler, J.S.

2000-06-23T23:59:59.000Z

178

Heliogyro Control  

E-Print Network (OSTI)

Heliogyros with blade length-to-width aspect ratios of 1000 can achieve ambitious science mission goals, but such designs have not been analyzed with rigor. Archived heliogyro analyses indicate that aspect ratios of 1000 are feasible, but the calculations supporting this claim are based on the simplifying assumptions of decoupled twist, vertical deflection, and in-plane deflection of the blades. In making such simplifications, the equations become more tractable, but crucial behavioral characteristics are possibly lost. Without a more rigorous analytical investigation, the reliability and robustness of the heliogyro remains in doubt. However, with verified control models and an appropriate operations strategy, performance of aggressive heliogyro designs can be presumed. This thesis asserts that heliogyro blades with aspect ratios of 1000:1 can sufficiently operate in space. The crux of this investigation is a high-fidelity model that accurately represents a heliogyro blade. Pitch controls command the thrust vector of the large sail structure. Although the validation model mimics a real solar sail, the controller is driven toward the most simplified configuration. The results of this research validate that a model-based controller that neglects blade twist, coning, and wrinkling can sufficiently control the thrust vector of a suitably designed heliogyro.

Richard S. Blomquist; Dimitrios Apostolopoulos; George Kantor; Andreas Von Flotow

2009-01-01T23:59:59.000Z

179

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TERMS/DEFINITIONS FROM DOE M 470.4-7 TERMS/DEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated security areas. ACCESS CONTROL MEASURES. Hardware and software features, physical controls, operating procedures, administrative procedures, and various combinations of these designed to detect or prevent unauthorized access to classified information; special nuclear materials; Government property; automated information systems, facilities, or materials; or areas containing the above and to enforce use of these measures to protect Departmental security and property interests. CRITICAL PATH SCENARIO. An adversary-based scenario that is generated during the conduct of a vulnerability assessment and accounts for adversary tactics that

180

Radiological Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE-STD-1098-2008 October 2008 DOE STANDARD RADIOLOGICAL CONTROL U.S. Department of Energy AREA SAFT Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. ii DOE-STD-1098-2008 This document is available on the Department of Energy Technical Standards Program Website at http://www.standards.doe.gov/ DOE-STD-1098-2008 Radiological Control DOE Policy October 2008 iii Foreword The Department of Energy (DOE) has developed this Standard to assist line managers in meeting their responsibilities for implementing occupational radiological control programs. DOE has established regulatory requirements for occupational radiation protection in Title 10 of the Code of Federal

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Radiological Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE-STD-1098-2008 October 2008 ------------------------------------- Change Notice 1 May 2009 DOE STANDARD RADIOLOGICAL CONTROL U.S. Department of Energy SAFT Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. DOE-STD-1098-2008 ii This document is available on the Department of Energy Technical Standards Program Website at http://www.standards.doe.gov/ iii DOE-STD-1098-2008 Change Notice 1: DOE-STD-1098-2008, Radiological Control Standard Section/page/paragraph Change Section 211, page 2-3, paragraph 1 Add new paragraph 1: "Approval by the appropriate Secretarial Officer or designee should be required

182

Extending the Constant Power Speed Range of the Brushless DC Motor through Dual Mode Inverter Control -- Part I: Theory and Simulation  

SciTech Connect

An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC) [1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance of DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range.

Lawler, J.S.

2001-10-29T23:59:59.000Z

183

NREL: Education Programs - Wind for Schools Project Gains Traction...  

NLE Websites -- All DOE Office Websites (Extended Search)

January 29, 2013 Pennsylvania is one area where the U.S. Department of Energy Wind Powering America Wind for Schools project is seeing big impact thanks to several projects...

184

REACTOR CONTROL  

DOE Patents (OSTI)

This patent relates to nuclear reactors of the type which utilize elongited rod type fuel elements immersed in a liquid moderator and shows a design whereby control of the chain reaction is obtained by varying the amount of moderator or reflector material. A central tank for containing liquid moderator and fuel elements immersed therein is disposed within a surrounding outer tank providing an annular space between the two tanks. This annular space is filled with liquid moderator which functions as a reflector to reflect neutrons back into the central reactor tank to increase the reproduction ratio. Means are provided for circulating and cooling the moderator material in both tanks and additional means are provided for controlling separately the volume of moderator in each tank, which latter means may be operated automatically by a neutron density monitoring device. The patent also shows an arrangement for controlling the chain reaction by injecting and varying an amount of poisoning material in the moderator used in the reflector portion of the reactor.

Ruano, W.J.

1957-12-10T23:59:59.000Z

185

Heliostat control  

DOE Patents (OSTI)

An improvement in a system and method of controlling heliostat in which the heliostat is operable in azimuth and elevation by respective stepper motors and including the respective steps or means for calculating the position for the heliostat to be at a commanded position, determining the number of steps in azimuth and elevation for each respective motor to get to the commanded position and energizing both the azimuth and elevation stepper motors to run in parallel until predetermined number of steps away from the closest commanded position in azimuth and elevation so that the closest position has been achieved, and thereafter energizing only the remaining motor to bring it to its commanded position. In this way, the heliostat can be started from a stowed position in the morning and operated by a computer means to its commanded position and kept correctly oriented throughout the day using only the time of the day without requiring the usual sensors and feedback apparatus. A computer, or microprocessor, can then control a plurality of many heliostats easily and efficiently throughout the day.

Kaehler, James A. (Littleton, CO)

1984-01-01T23:59:59.000Z

186

Electric Drive Status and Challenges  

NLE Websites -- All DOE Office Websites (Extended Search)

to Achieve Traction Drive Cost Target * Inverter: cold plate, drive boards, thermal interface material, bus bar, current sensors, housing, control board, etc. Motor:...

187

Urban Electric Vehicle (UEV) Technical Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

2 UEV AMERICA January 1, 2003 TECHNICAL SPECIFICATIONS (14) The controllerinverter shall control the minimum traction battery discharge voltage to prevent degradation...

188

Fuzzy control of steam turbines  

Science Conference Proceedings (OSTI)

Keywords: PID control, comparison of PID and fuzzy control, fuzzy logic control, robustness, speed control, steam turbine control

N. Kiupel; P. M. Frank; O. Bux

1994-05-01T23:59:59.000Z

189

Controlled Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

lUU lUU iIII---11111 q o m Controlled Synthesis of Polyenes by Catalytic Methods Progress Report for the period 12/01/92 - 11/30/93 Richard R. Schrock Five papers have appeared in the last year (see list at end), numbers 225,229, 233, 236, and 240. The living cyclopolymerization of dipropargyl derivatives has been reported for diethyl dipropargylmalonate (X = C(CO2Et)2; Scheme I; #225). We have found that c_ addition and [3 addition take place approximately to an equivalent degree, on the basis of the 13C NMR chemical shift for the quaternary carbon atom in the five or si×-membered ring, and in the presence of ethylene have isolated a molecule that contains a si×-membered ring that is formed when ethylene cleaves the cyclized species from the metal in a chain transfer-like reaction. On this basis also we can say that the polymer prepared from this monomer using classical catalysts contain

190

Lighting Group: Controls: Advanced Digital Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Digital Controls Advanced Digital Controls HPCBS Advanced Digital Controls Objective The goal of this project is to hasten the adoption of digital lighting control systems to allow commercial building operators to optimize the neergy performance of their lighting systems, implement demand responsive control, and improve occupant comfort and productivity. The specific objectives are as follows: (1) Advance the adoption of digital lighting control systems by working with industry to embed IBECS technology into existing analog control and DALI products, and by developing compelling demonstrations of digital control systems for evaluation by early adopters. (2) In collaboration with equipment manufacturers, produce digital lighting system prototypes that demonstrate the advantages of digitally controlled lighting systems to innovative property managers and other energy stakeholders. A digitally controlled lighting system consists of lights that are individually controllable via a network. The advantages of digital control are:

191

Robotics Control using Active Disturbance Rejection Control.  

E-Print Network (OSTI)

??Conventional robotics control has been set in stone since the sixties. The world has been waiting too long for a new age of control to (more)

Khairallah, Ousama Said

2009-01-01T23:59:59.000Z

192

Computer/Controller 1588  

Science Conference Proceedings (OSTI)

... Computer/Controller? What is a computer or controller? ... Computer/controllers in a system supporting IEEE 1588 will typically include a 1588 clock. ...

2010-10-29T23:59:59.000Z

193

Strong Analytic Controllability for Hydrogen Control Systems  

E-Print Network (OSTI)

The realization and representation of so(4,2) associated with the hydrogen atom Hamiltonian are derived. By choosing operators from the realization of so(4,2) as interacting Hamiltonians, a hydrogen atom control system is constructed, and it is proved that this control system is strongly analytically controllable based on a time-dependent strong analytic controllability theorem.

Chunhua Lan; Tzyh-Jong Tarn; Quo-Shin Chi; John W. Clark

2004-09-22T23:59:59.000Z

194

Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Concentrated Windings  

SciTech Connect

It is well known that the ability of the permanent magnet synchronous machine (PMSM) to operate over a wide constant power speed range (CPSR) is dependent upon the machine inductance [1,2,3,4,5]. Early approaches for extending CPSR operation included adding supplementary inductance in series with the motor [1] and the use of anti-parallel thyristor pairs in series with the motor-phase windings [5]. The increased inductance method is compatible with a voltage-source inverter (VSI) controlled by pulse-width modulation (PWM) which is called the conventional phase advance (CPA) method. The thyristor method has been called the dual mode inverter control (DMIC). Neither of these techniques has met with wide acceptance since they both add cost to the drive system and have not been shown to have an attractive cost/benefit ratio. Recently a method has been developed to use fractional-slot concentrated windings to significantly increase the machine inductance [6]. This latest approach has the potential to make the PMSM compatible with CPA without supplemental external inductance. If the performance of such drive is acceptable, then the method may make the PMSM an attractive option for traction applications requiring a wide CPSR. A 30 pole, 6 kW, 6000 maximum revolutions per minute (rpm) prototype of the fractional-slot PMSM design has been developed [7]. This machine has significantly more inductance than is typical of regular PMSMs. The prototype is to be delivered in late 2005 to the Oak Ridge National Laboratory (ORNL) for testing and development of a suitable controller. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study the steady-state performance of high-inductance PMSM machines with a view towards control issues. The detailed steady-state model developed includes all motor and inverter-loss mechanisms and will be useful in assessing the performance of the dynamic controller to be developed in future work. This report documents the results of this preliminary investigation.

Lawler, J.S.

2005-12-21T23:59:59.000Z

195

VEHICLE SPECIFICATIONS Vehicle Features Base Vehicle: 2010 Volkswagen  

NLE Websites -- All DOE Office Websites (Extended Search)

Golf TDI Bluemotion VIN: WVWZZZ1KZAW388111 Seatbelt Positions: 5 Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control...

196

PERFORMANCE STATISTICS WEIGHTS  

NLE Websites -- All DOE Office Websites (Extended Search)

2006 Honda Civic VIN: JHMFA36216S019329 Seatbelt Positions: Five Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control Space...

197

Interim Project Results: United Parcel Service's Second-Generation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Application for Each Engine and Truck Manufacturer Hybrid Drive Unit Transmission InverterControls Partners Brakes (ABS) Eaton Hybrid Electric System UPS' hybrid-electric...

198

Incoherent Control of Locally Controllable Quantum Systems  

E-Print Network (OSTI)

An incoherent control scheme for state control of locally controllable quantum systems is proposed. This scheme includes three steps: (1) amplitude amplification of the initial state by a suitable unitary transformation, (2) projective measurement on the amplified state, and (3) final optimization by a unitary controlled transformation. The first step increases the amplitudes of some desired eigenstates and the corresponding probability of observing these eigenstates, the second step projects, with high probability, the amplified state into a desired eigenstate, and the last step steers this eigenstate into the target state. Within this scheme, two control algorithms are presented for two classes of quantum systems. As an example, the incoherent control scheme is applied to the control of a hydrogen atom by an external field. The results support the suggestion that projective measurements can serve as an effective control and local controllability information can be used to design control laws for quantum systems. Thus, this scheme establishes a subtle connection between control design and controllability analysis of quantum systems and provides an effective engineering approach for controlling quantum systems with partial controllability information.

Daoyi Dong; Chenbin Zhang; Herschel Rabitz; Alexander Pechen; Tzyh-Jong Tarn

2008-10-21T23:59:59.000Z

199

Design of a fuzzy controller for energy management of a parallel hybrid electric vehicle  

E-Print Network (OSTI)

This thesis addresses the design of a control scheme based on Fuzzy Logic to minimize automobile fuel consumption and exhaust emissions while maximizing battery state of charge (SOC) for hybrid vehicles. The advantages the hybrid vehicle has over the conventional vehicle are very low emission of pollutants, and more efficient fuel consumption if controlled properly. The principal components of the drive train are an internal combustion engine and an electric motor. Since there are two devices, it becomes impossible for the driver to individually control both components while driving along, and it will be necessary to automate the use of these elements so that the vehicle is driven in the same way as a conventional vehicle. In the parallel configuration, both devices apply torque directly to the drive shaft for propelling the vehicle. Each component of the hybrid vehicle is modeled, and throttle angle, motor current and brake torque command are chosen as the control inputs. Another input considered is the driver behavior. This input is obtained from an Artificial Neural Network that classifies the behavior based on the pedal angle characteristics over a period of time. The problem in question is how to distribute the energy demands for each component of the hybrid vehicle so that the objectives, maximizing the battery SOC and minimizing fuel consumption and pollutant emissions, are met. Because these objectives depend on different components, we must decide how to demand energy from them to fulfill the driver request and at the same time meeting the objectives. A Fuzzy Logic Controller is designed to meet the driver demand so that the engine, motor and battery are as little exposed as possible to abrupt transitions. Smooth transitions are desired in the engine in order to decrease fuel consumption and emission of pollutants. Smooth transitions in the battery will lead to extended battery life. Simulation results verify that the controller achieves the design objectives. Because the design procedure is based on trial and error, optimality is not guaranteed. Also stability is hard to prove, since there is not much information on this particular issue of Fuzzy Logic.

Estrada Gutierrez, Pedro Cuauhtemoc

1997-01-01T23:59:59.000Z

200

Grinding circuit control using programmable logic controllers  

Science Conference Proceedings (OSTI)

This paper presents an application for cement milling system. In this application the process is controlled by software running on Programmable Logic Controllers. The appliance used to observe industrial process show the following mill parameters: feed ... Keywords: PLC programming, ball mill, clinker grinding, grinding circuit, programmable logic controllers

Costea R. Claudiu; Silaghi Helga Maria; Rohde L. Ulrich; Silaghi A. Marius

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Controller synthesis for networked control systems  

Science Conference Proceedings (OSTI)

This paper presents a discrete-time model for networked control systems (NCSs) that incorporates all network phenomena: time-varying sampling intervals, packet dropouts and time-varying delays that may be both smaller and larger than the sampling interval. ... Keywords: Linear matrix inequalities, Networked control systems, Sampled-data control, Stability analysis, Time-varying delay

M. B. G. Cloosterman; L. Hetel; N. van de Wouw; W. P. M. H. Heemels; J. Daafouz; H. Nijmeijer

2010-10-01T23:59:59.000Z

202

Customer Side Monitoring at an Automobile Brake Manufacturer  

Science Conference Proceedings (OSTI)

This customer-side monitoring project correlated distribution-related power quality (PQ) events with customer-side events and vice-versa and characterized equipment sensitivity to voltage variations. It also characterized overall levels of PQ on the feeder and in the facility and compared these levels with the national baseline sample being gathered for the Distribution Power Quality project.

2003-12-31T23:59:59.000Z

203

Mechanical and Regenerative Braking Integration for a Hybrid Electric Vehicle.  

E-Print Network (OSTI)

??Hybrid electric vehicle technology has become a preferred method for the automotive industry to reduce environmental impact and fuel consumption of their vehicles. Hybrid electric (more)

DeMers, Steven Michael

2008-01-01T23:59:59.000Z

204

Magnetite Formation Observed with TEM on Brake Discs  

Science Conference Proceedings (OSTI)

Carbothermal Production of Zrb2-Zro2 Composite Powder from Zro2-B2O3/B System by ... Lignocellulosic-Based Carbon Fibers from Biofuel Production Wastes.

205

NREL: Continuum Magazine - Putting On the Brakes to Protect America...  

NLE Websites -- All DOE Office Websites (Extended Search)

beyond. Sustainable Transportation Reaches Across-and Beyond-Parks A photo of three propane buses parked on asphalt road in treed park setting with stone cliffs in the...

206

Superconducting VAR control  

DOE Patents (OSTI)

Static VAR control means employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

Boenig, Heinrich J. (Los Alamos, NM); Hassenzahl, William V. (Piedmont, CA)

1982-01-01T23:59:59.000Z

207

CONTROL LIMITER DEVICE  

DOE Patents (OSTI)

A control-limiting device for monltoring a control system is described. The system comprises a conditionsensing device, a condition-varying device exerting a control over the condition, and a control means to actuate the condition-varying device. A control-limiting device integrates the total movement or other change of the condition-varying device over any interval of time during a continuum of overlapping periods of time, and if the tothl movement or change of the condition-varying device exceeds a preset value, the control- limiting device will switch the control of the operated apparatus from automatic to manual control.

DeShong, J.A.

1960-03-01T23:59:59.000Z

208

Quantum Multiobservable Control  

E-Print Network (OSTI)

We present deterministic algorithms for the simultaneous control of an arbitrary number of quantum observables. Unlike optimal control approaches based on cost function optimization, quantum multiobservable tracking control (MOTC) is capable of tracking predetermined homotopic trajectories to target expectation values in the space of multiobservables. The convergence of these algorithms is facilitated by the favorable critical topology of quantum control landscapes. Fundamental properties of quantum multiobservable control landscapes that underlie the efficiency of MOTC, including the multiobservable controllability Gramian, are introduced. The effects of multiple control objectives on the structure and complexity of optimal fields are examined. With minor modifications, the techniques described herein can be applied to general quantum multiobjective control problems.

Raj Chakrabarti; Rebing Wu; Herschel Rabitz

2008-05-12T23:59:59.000Z

209

Control of Customer Property  

NLE Websites -- All DOE Office Websites (Extended Search)

5 EOTA Inventory Control Process 110620.doc110620 Page 1 of 6 EOTA - Business Process Document Title: EOTA Inventory Control Process Document Number: MGTP-005 Rev. 110620...

210

NSLS Work Planning & Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Work Planning & Controls NSLS Work Planning and Control Procedure Lead Working Guidelines Information on Working in Areas Subject to Radiation from VUV Injection Procedure for...

211

Air Pollution Control (Indiana)  

Energy.gov (U.S. Department of Energy (DOE))

This legislation establishes the Department of Environmental Management and the Air Pollution Control Board, which are tasked with the prevention, abatement, and control of air pollution by all...

212

Personal Universal Controllers: Controlling Complex Appliances with . . .  

E-Print Network (OSTI)

We envision a future where each person will carry with them a personal universal controller (PUC), a portable computerized device that allows the user to control any appliance within their environment. The PUC has a two-way communication channel with each appliance. It downloads a specification of the appliance's features and then automatically generates an interface for controlling that appliance (graphical, speech, or both). In this demonstration we present a working PUC system that automatically generates graphical and speech interfaces, and controls real appliances, including a shelf stereo and a Sony camcorder.

Jeffrey Nichols; Brad A. Myers; Michael Higgins; Joseph Hughes; Thomas K. Harris; Roni Rosenfeld; Kevin Litwack

2003-01-01T23:59:59.000Z

213

NSLS Controls & Diagnostics  

NLE Websites -- All DOE Office Websites (Extended Search)

Controls & Diagnostics Systems Other Projects and Responsibilities WebDAQs Presentations Papers Tech Notes...

214

Control physical models  

Science Conference Proceedings (OSTI)

This paper describes design of model physical model of rectification column. Physical model is appointed as a demonstration system control for distillation by means of control system SIMATIC PCS7 from company SIEMENS. The SIMATIC PCS7 Process control ... Keywords: description, distillation, physical model, process control system

Tom Dvo?k; Jan Blek

2005-03-01T23:59:59.000Z

215

HYDRAULIC SERVO CONTROL MECHANISM  

DOE Patents (OSTI)

A hydraulic servo control mechanism of compact construction and low fluid requirements is described. The mechanism consists of a main hydraulic piston, comprising the drive output, which is connected mechanically for feedback purposes to a servo control piston. A control sleeve having control slots for the system encloses the servo piston, which acts to cover or uncover the slots as a means of controlling the operation of the system. This operation permits only a small amount of fluid to regulate the operation of the mechanism, which, as a result, is compact and relatively light. This mechanism is particuiarly adaptable to the drive and control of control rods in nuclear reactors. (auth)

Hussey, R.B.; Gottsche, M.J. Jr.

1963-09-17T23:59:59.000Z

216

Nuclear reactor control apparatus  

DOE Patents (OSTI)

Nuclear reactor core safety rod release apparatus comprises a control rod having a detent notch in the form of an annular peripheral recess at its upper end, a control rod support tube for raising and lowering the control rod under normal conditions, latches pivotally mounted on the control support tube with free ends thereof normally disposed in the recess in the control rod, and cam means for pivoting the latches out of the recess in the control rod when a scram condition occurs. One embodiment of the invention comprises an additional magnetically-operated latch for releasing the control rod under two different conditions, one involving seismic shock.

Sridhar, Bettadapur N. (Cupertino, CA)

1983-11-01T23:59:59.000Z

217

Document Control Process  

NLE Websites -- All DOE Office Websites (Extended Search)

1 Document Control Process 11_0304 Page 1 of 7 1 Document Control Process 11_0304 Page 1 of 7 EOTA - Business Process Document Title: Document Control Process Document Number: P-001 Rev 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): F-001 Document Control Template - Process, F-002 Document Control Template - Instruction, F-003 Document Control Template - Screenshot, F-004 Document Control Template - Form, F-005 Document Control Template - Form - Excel, MGTP-002 Skill Set Model, Q-003 EOTA Processes: Sequence and Interaction, P-003, Control of Records P-001 Document Control Process 11_0304 Page 2 of 7 Revision History: Rev. Description of Change

218

Electric vehicle test report, Cutler-Hammer Corvette  

DOE Green Energy (OSTI)

The work described was part of the effort to characterize vehicles for the state-of-the-art assessment of electric vehicles. The vehicle evaluated was a Chevrolet Corvette converted to electric operation. The vehicle was based on a standard production 1967 chassis and body. The original internal combustion engine was replaced by an electric traction motor. Eighteen batteries supplied the electrical energy. A controller, an onboard battery charger, and several dashboard instruments completed the conversion. The remainder of the vehicle, and in particular the remainder of the drive-train (clutch, driveshaft, and differential), was stock, except for the transmission. The overall objective of the tests was to develop performance data at the system and subsystem level. The emphasis was on the electrical portion of the drive train, although some analysis and discussion of the mechanical elements are included. There was no evaluation of other aspects of the vehicle such as braking, ride, handling, passenger accomodations, etc. Included are a description of the vehicle, the tests performed and a discussion of the results. Tests were conducted both on the road (actually a mile long runway) and in a chassis dynamometer equipped laboratory. The majority of the tests performed were according to SAE Procedure J227a and included maximum effort accelerations, constant-speed range, and cyclic range. Some tests that are not a part of the SAE Procedure J227a are described and the analysis of the data from all tests is discussed. (LCL)

Not Available

1981-01-01T23:59:59.000Z

219

Control rod drive  

DOE Patents (OSTI)

A control rod drive uses gravitational forces to insert one or more control rods upwardly into a reactor core from beneath the reactor core under emergency conditions. The preferred control rod drive includes a vertically movable weight and a mechanism operatively associating the weight with the control rod so that downward movement of the weight is translated into upward movement of the control rod. The preferred control rod drive further includes an electric motor for driving the control rods under normal conditions, an electrically actuated clutch which automatically disengages the motor during a power failure and a decelerator for bringing the control rod to a controlled stop when it is inserted under emergency conditions into a reactor core.

Hawke, Basil C. (Solana Beach, CA)

1986-01-01T23:59:59.000Z

220

Strategic Trade Control: Multilateral Export Control Arrangements  

NLE Websites -- All DOE Office Websites (Extended Search)

Multilateral Multilateral Export Control Arrangements Nonproliferation & National Security (NPNS) Overview Technical Nonproliferation Policy Support Strategic Trade Control Review of export license applications Multilateral Export Control Arrangements Interdiction Engagement & Training INECP INSEP GIPP Safeguards Concepts and Approaches Human Capital Development Additional Protocol Technical Assistance National Security Systems & Assessments National Security Information Systems Vulnerability Assessment Team (VAT) Radiation Detection & Response (RDR) Contact NPNS Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Nonproliferation and National Security Program Technical Nonproliferation Policy Support (TNPS)

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

CONTROL ROD DRIVE  

DOE Patents (OSTI)

Accurate and controlled drive for the control rod is from an electric motor. A hydraulic arrangement is provided to balance a piston against which a control rod is urged by the application of fluid pressure. The electric motor drive of the control rod for normal operation is made through the aforementioned piston. In the event scramming is required, the fluid pressure urging the control rod against the piston is relieved and an opposite fluid pressure is applied. The lack of mechanical connection between the electric motor and control rod facilitates the scramming operation.

Chapellier, R.A.; Rogers, I.

1961-06-27T23:59:59.000Z

222

Control system design method  

Science Conference Proceedings (OSTI)

A control system design method and concomitant control system comprising representing a physical apparatus to be controlled as a Hamiltonian system, determining elements of the Hamiltonian system representation which are power generators, power dissipators, and power storage devices, analyzing stability and performance of the Hamiltonian system based on the results of the determining step and determining necessary and sufficient conditions for stability of the Hamiltonian system, creating a stable control system based on the results of the analyzing step, and employing the resulting control system to control the physical apparatus.

Wilson, David G. (Tijeras, NM); Robinett, III, Rush D. (Tijeras, NM)

2012-02-21T23:59:59.000Z

223

Simplified Sensorless Control for BLDC Motor, Using DSP Technology Juan W. Dixon, Matas Rodrguez and Rodrigo Huerta  

E-Print Network (OSTI)

were used. The motor tested is a 12kW (16HP) Brushless Permanent magnet Motor, with an IGBT inverter motors, and brushless permanent magnet motors do not have brushes, and their rotors are robust because machines for traction applications are the most popular: i) the Permanent Magnet Synchronous Motor (PMSM

Rudnick, Hugh

224

Appendix B - Control Points  

NLE Websites -- All DOE Office Websites (Extended Search)

B B Control Points B.1 Injector Control Points Qty Type Device 2 Magnet Bend magnet - DL1 bend 9 Magnet Quad magnet 10 Magnet X-Y Corrector Pair 2 Magnet Solenoid 2 Magnet...

225

Control of Customer Property  

NLE Websites -- All DOE Office Websites (Extended Search)

Report of Lost, Damaged, Destroyed or Stolen (RLDDS) Property, MGTP-005 EOTA Inventory Process, MGTP-006 for control of EOTA issued key(s) MGTP-003 Control of Customer...

226

Solar control design package  

DOE Green Energy (OSTI)

Information used in the evaluation of design of Solar Control's solar heating and cooling system controller and the Solarstat is presented. System performance specifications, design data brochures, and detailed design drawings are presented.

Not Available

1978-08-01T23:59:59.000Z

227

Portable controls experiments  

E-Print Network (OSTI)

Experiments for controls classes like MIT's 2.004 require large lab setups and expensive equipment such as oscilloscopes and function generators. We developed a series of controls experiments based on National Instruments' ...

Larson, Richard Winston

2012-01-01T23:59:59.000Z

228

Open Architecture Control  

Science Conference Proceedings (OSTI)

... Forum, Orlando, FL, January 2004. I-4 Regional Meeting: Process Control Security, ExxonMobil Research and Engineering ...

2007-09-26T23:59:59.000Z

229

Networked Control Systems Group  

Science Conference Proceedings (OSTI)

... and deploys measurement science for sensor networks and control systems used in manufacturing, construction, and other cyber-physical systems ...

2012-08-30T23:59:59.000Z

230

Simplified distillation column controls  

SciTech Connect

A simple, energy efficient method of controlling single or double distillation columns for the production of ethyl alcohol is described. The control system is based on a material balance scheme centered around a thermostat actuated control valve to regulate reflux rate and product purity. Column bottom's levels are automatically regulated by vented suction lines on the pump inlets. Methods of minimizing control input variations are used including column insulation, stillage-to-beer heat exchanger, and a steam pressure regulator.

Badger, P.; Pile, R.; Lightsey, G.

1984-01-01T23:59:59.000Z

231

Control of Test Conduct  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Revision 1 Effective June 2008 Control of Test Conduct Prepared by Electric Transportation Applications Prepared by: Date: Garrett P....

232

Lighting Control Systems  

Science Conference Proceedings (OSTI)

The demand for lighting control systems in residential, commercial, and industrial facilities is on the rise with the demand for increased energy savings. With lighting accounting for almost 23% of grid load, there is significant opportunity to reduce lighting load while improving the quality of light for customers. Lighting control systems are becoming more intelligent as the need for them to interface with building control systems and demand response systems also increases. Lighting control systems use...

2009-12-17T23:59:59.000Z

233

Informal Control code logic  

E-Print Network (OSTI)

General definitions as well as rules of reasoning regarding control code production, distribution, deployment, and usage are described. The role of testing, trust, confidence and risk analysis is considered. A rationale for control code testing is sought and found for the case of safety critical embedded control code.

Bergstra, Jan A

2010-01-01T23:59:59.000Z

234

CONTROL FOR NEUTRONIC REACTOR  

DOE Patents (OSTI)

S>A control rod operating device in a nuclear reactor of the type in which the control rod is gradually withdrawn from the reactor to a position desired during stable operation is described. The apparatus is comprised essentially of a stop member movable in the direction of withdrawal of the control rod, a follower on the control rod engageable with the stop and means urging the follower against the stop in the direction of withdrawal. A means responsive to disengagement of the follower from the stop is provided for actuating the control rod to return to the reactor shut-down position.

Lichtenberger, H.V.; Cameron, R.A.

1959-03-31T23:59:59.000Z

235

Water heater control module  

DOE Patents (OSTI)

An advanced electric water heater control system that interfaces with a high temperature cut-off thermostat and an upper regulating thermostat. The system includes a control module that is electrically connected to the high-temperature cut-off thermostat and the upper regulating thermostat. The control module includes a switch to open or close the high-temperature cut-off thermostat and the upper regulating thermostat. The control module further includes circuitry configured to control said switch in response to a signal selected from the group of an autonomous signal, a communicated signal, and combinations thereof.

Hammerstrom, Donald J

2013-11-26T23:59:59.000Z

236

Control of Customer Property  

NLE Websites -- All DOE Office Websites (Extended Search)

6 EOTA Key Control Process 11_0119.docx1_0119 6 EOTA Key Control Process 11_0119.docx1_0119 Page 1 of 5 EOTA - Business Process Document Title: EOTA Key Control Process Document Number: MGTP-006 Rev. 11_0119 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: MGTP-003 Control of Customer Property Notify of Changes: EOTA Employees Referenced Document(s): MGTF-012 Key Check-Out Form MGTP-006 EOTA Key Control Process 11_0119.docx1_0119 Page 2 of 5 Revision History: Rev. Description of Change 10_0823 Initial Release 11_0119 Modified process to include steps to take if an employee does not return a key. MGTP-006 EOTA Key Control Process 11_0119.docx1_0119 Page 3 of 5 I. Purpose To establish a process for control of all EOTA keys.

237

CRUCIFORM CONTROL ROD JOINT  

DOE Patents (OSTI)

An invention is described which relates to nuclear reactor control rod components and more particularly to a joint between cruciform control rod members and cruciform control rod follower members. In one embodiment this invention provides interfitting crossed arms at adjacent ends of a control rod and its follower in abutting relation. This holds the members against relative opposite longitudinal movement while a compression member keys the arms against relative opposite rotation around a common axis. Means are also provided for centering the control rod and its follower on a common axis and for selectively releasing the control rod from its follower for the insertion of a replacement of the control rod and reuse of the follower. (AEC)

Thorp, A.G. II

1962-08-01T23:59:59.000Z

238

One Controlling Many  

NLE Websites -- All DOE Office Websites (Extended Search)

One Controlling Many One Controlling Many As Unmanned Systems proliferate the battle space, the decisive advantages historically provided by strategy, tactics, and training must be translated into Unmanned Systems (UMS) Control Systems. It is a challenge to effectively control large numbers of UMS. The human operator must be freed to focus on high level perception, tactics, and strategy while the system automates lower level functions. The Intelligent Systems, Robotics, and Cybernetics (ISRC) Group at Sandia National Laboratories is working to develop a controls system for single-operator multiple unmanned systems control. Critical Characteristics * A single operator controls a heterogeneous team of several (three to six) unmanned ground (UGVs) and aerial vehicles (UAVs) performing multiple

239

Modeling and control of thermostatically controlled loads  

SciTech Connect

As the penetration of intermittent energy sources grows substantially, loads will be required to play an increasingly important role in compensating the fast time-scale fluctuations in generated power. Recent numerical modeling of thermostatically controlled loads (TCLs) has demonstrated that such load following is feasible, but analytical models that satisfactorily quantify the aggregate power consumption of a group of TCLs are desired to enable controller design. We develop such a model for the aggregate power response of a homogeneous population of TCLs to uniform variation of all TCL setpoints. A linearized model of the response is derived, and a linear quadratic regulator (LQR) has been designed. Using the TCL setpoint as the control input, the LQR enables aggregate power to track reference signals that exhibit step, ramp and sinusoidal variations. Although much of the work assumes a homogeneous population of TCLs with deterministic dynamics, we also propose a method for probing the dynamics of systems where load characteristics are not well known.

Backhaus, Scott N [Los Alamos National Laboratory; Sinitsyn, Nikolai [Los Alamos National Laboratory; Kundu, S. [UNIV OF MICHIGAN; Hiskens, I. [UNIV OF MICHIGAN

2011-01-04T23:59:59.000Z

240

Impacts of NOx Controls on Mercury Controllability  

Science Conference Proceedings (OSTI)

Past tests have led researchers and air pollution regulators to hypothesize that nitrogen oxides (NOx) controls can enhance mercury capture by particulate collection devices and sulfur dioxide (SO2) scrubbers. This technology review presents results obtained to date from a comprehensive program designed to confirm, qualify, and quantify these hypotheses.

2002-03-13T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Air Pollution Control Regulations: No.27 - Control of Nitrogen...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

27 - Control of Nitrogen Oxide Emissions (Rhode Island) Air Pollution Control Regulations: No.27 - Control of Nitrogen Oxide Emissions (Rhode Island) Eligibility Commercial...

242

NETL: Mercury Emissions Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Mercury Emissions Control Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Mercury Emissions Control Innovations for Existing Plants Mercury Emissions Control NETL managed the largest funded research program in the country to develop an in-depth understanding of fossil combustion-based mercury emissions. The program goal was to develop effective control options that would allow generators to comply with regulations. Research focus areas included measurement and characterization of mercury emissions, as well as the development of cost-effective control technologies for the U.S. coal-fired electric generating industry. Control Technologies Field Testing Phase I & II Phase III Novel Concepts APCD Co-benefits Emissions Characterization

243

CHSP: HAZARD CONTROLS  

NLE Websites -- All DOE Office Websites (Extended Search)

HYGIENE HYGIENE AND SAFETY PLAN CHSP SITE MAP HAZARD CONTROLS CONTROLS FOR HAZARDOUS MATERIALS arrow image WORK PRACTICE CONTROLS arrow image CHEMICAL STORAGE GUIDELINES DECOMISSIONING LAB AND SHOP SPACES SPECIFIC CONTROLS AND PROCEDURES arrow image EMERGENCY PROCEDURES AND EQUIPMENT arrow image APPENDICES arrow image FAQs QUESTIONS Search the CHSP: > Go spacer image EH&S Home PUB 3000 LBNL Home LBNL A-Z Index LBNL Search LBNL Phone Book Privacy & Security Notice spacer spacer image spacer image spacer image HAZARD CONTROLS This section discusses control procedures for limiting employee exposure to chemical hazards. Technical Areas Technical areas include laboratories, shops, workrooms, and similar areas where non-administrative activities are performed. For the purpose of the

244

Nuclear reactor control  

DOE Patents (OSTI)

1. In a nuclear reactor incorporating a plurality of columns of tubular fuel elements disposed in horizontal tubes in a mass of graphite wherein water flows through the tubes to cool the fuel elements, the improvement comprising at least one control column disposed in a horizontal tube including fewer fuel elements than in a normal column of fuel elements and tubular control elements disposed at both ends of said control column, and means for varying the horizontal displacement of the control column comprising a winch at the upstream end of the control column and a cable extending through the fuel and control elements and attached to the element at the downstream end of the column.

Cawley, William E. (Phoenix, AZ); Warnick, Robert F. (Pasco, WA)

1982-01-01T23:59:59.000Z

245

Programmable Logic Controllers  

E-Print Network (OSTI)

Programmable Logic Controllers (PLCs) drive the behavior of industrial control systems according to uploaded programs. It is now known that PLCs are vulnerable to the uploading of malicious code that can have severe physical consequences. What is not understood is whether an adversary with no knowledge of the PLCs interface to the control system can execute a damaging, targeted, or stealthy attack against a control system using the PLC. In this paper, we present SABOT, a tool that automatically maps the control instructions in a PLC to an adversary-provided specification of the target control systems behavior. This mapping recovers sufficient semantics of the PLCs internal layout to instantiate arbitrary malicious controller code. This lowers the prerequisite knowledge needed to tailor an attack to a control system. SABOT uses an incremental model checking algorithm to map a few plant devices at a time, until a mapping is found for all adversary-specified devices. At this point, a malicious payload can be compiled and uploaded to the PLC. Our evaluation shows that SABOT correctly compiles payloads for all tested control systems when the adversary correctly specifies full system behavior, and for 4 out of 5 systems in most cases where there where unspecified features. Furthermore, SABOT completed all analyses in under 2 minutes.

Stephen Mclaughlin; Patrick Mcdaniel; Stephen Mclaughlin; Patrick Mcdaniel

2012-01-01T23:59:59.000Z

246

Ice maker safety control  

Science Conference Proceedings (OSTI)

In a refrigeration apparatus including an evaporator, a defrost heater for defrosting the evaporator, a defrost thermostat having a switch for de-energizing the defrost heater at a preselected high temperature of the evaporator, and an ice making apparatus having a mold, a mold heater, and a control circuit controllably energized the mold heater, a safety control for the ice making apparatus is described comprising: means for thermally coupling the defrost thermostat with the mold; and means electrically connecting the defrost thermostat switch with the control circuit for de-energizing the mold heater at a preselected high temperature of the mold to prevent overheating thereof.

Linstromberg, W.J.

1988-05-03T23:59:59.000Z

247

Fluctuations and Nanoscale Control  

Science Conference Proceedings (OSTI)

... Selected Publications: Simultaneous positioning and orientation of a single nano-object by flow control: theory and simulations, PP Mathai, AJ ...

2012-03-29T23:59:59.000Z

248

Emissions & Emission Controls - FEERC  

NLE Websites -- All DOE Office Websites (Extended Search)

Emissions and Emission Controls In conjunction with the research efforts at FEERC to improve fuel efficiency and reduce petroleum use, research on emissions is conducted with two...

249

Hydraulic control rod  

DOE Patents (OSTI)

Apparatus for shifting a control rod into and out of a nuclear reactor utilizing as pressure fluid the fluid employed as coolant moderator in the reactor.

Treshow, Michael (Hinsdale, IL)

1976-01-01T23:59:59.000Z

250

Role Based Access Control  

Science Conference Proceedings (OSTI)

... Nash and Poland [10] discuss the application of role based access control to cryptographic authentication devices commonly used in the banking ...

251

Control of Records Procedure  

NLE Websites -- All DOE Office Websites (Extended Search)

1 Revision 1 Effective June 2008 Control, Close-out, and Storage of Documentation Prepared by Electric Transportation Applications Prepared by: ...

252

Computer Applications & Process Control  

Science Conference Proceedings (OSTI)

[valSummaryfrmSearchResults]. Item 1. Topic: Computer Applications & Process Control. Sort by: Title, Author, Publisher, Product Type, In Stock, Date Published...

253

Cooled, temperature controlled electrometer  

DOE Patents (OSTI)

A cooled, temperature controlled electrometer for the measurement of small currents. The device employs a thermal transfer system to remove heat from the electrometer circuit and its environment and dissipate it to the external environment by means of a heat sink. The operation of the thermal transfer system is governed by a temperature regulation circuit which activates the thermal transfer system when the temperature of the electrometer circuit and its environment exceeds a level previously inputted to the external variable temperature control circuit. The variable temperature control circuit functions as subpart of the temperature control circuit. To provide temperature stability and uniformity, the electrometer circuit is enclosed by an insulated housing.

Morgan, John P. (Idaho Falls, ID)

1992-01-01T23:59:59.000Z

254

Air Pollution Controls  

Energy.gov (U.S. Department of Energy (DOE))

Various statutes within the Wisconsin Legislative Documents relate to air pollution control. These statutes describe zoning, permitting, and emissions regulations for hazardous and non-hazardous...

255

Radiation Control (Virginia)  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Health is responsible for regulating radiation and radioactive materials in the Commonwealth of Virginia. Although the Department's Radiation Control Program primarily focuses on...

256

Shore Erosion Control (Maryland)  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Natural Resources is responsible for creating and implementing a program designed to minimize shore erosion through education, erosion control projects, promulgate regulations,...

257

Controlling Graphene's Electronic Structure  

NLE Websites -- All DOE Office Websites (Extended Search)

Controlling Graphene's Electronic Structure Print Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has enormous potential for use in...

258

Controlling Graphene's Electronic Structure  

NLE Websites -- All DOE Office Websites (Extended Search)

Controlling Graphene's Electronic Structure Print Wednesday, 25 April 2007 00:00 Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has...

259

Document Control Template-Form  

NLE Websites -- All DOE Office Websites (Extended Search)

5ADocument Control Template - ExcelForm EOTA - Business Form Document Title: P-001, Document Control Process Document Number: Document Control Template - Excel Form EOTA...

260

Personal building controls  

Science Conference Proceedings (OSTI)

Buildings are some of the largest energy consumers in the world and yet occupants are regularly dissatisfied with the interior environment in large part due to thermal discomfort [7]. Studies show that given personal control over their environment, occupants ... Keywords: building, energy, hvac, lighting, personal controls

Andrew Krioukov; David Culler

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Stepping motor controller  

SciTech Connect

A stepping motor is microprocessingly controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

Bourret, Steven C. (Los Alamos, NM); Swansen, James E. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

262

Stepping motor controller  

DOE Patents (OSTI)

A stepping motor is microprocessor controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

Bourret, S.C.; Swansen, J.E.

1982-07-02T23:59:59.000Z

263

Contamination Control Techniques  

SciTech Connect

Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

EBY, J.L.

2000-05-16T23:59:59.000Z

264

NUCLEAR REACTOR CONTROL SYSTEM  

DOE Patents (OSTI)

A control system is described for a nuclear reactor using enriched uranium fuel of the type of the swimming pool and other heterogeneous nuclear reactors. Circuits are included for automatically removing and inserting the control rods during the course of normal operation. Appropriate safety circuits close down the nuclear reactor in the event of emergency.

Epler, E.P.; Hanauer, S.H.; Oakes, L.C.

1959-11-01T23:59:59.000Z

265

DOE Mercury Control Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Control Research Mercury Control Research Air Quality III: Mercury, Trace Elements, and Particulate Matter September 9-12, 2002 Rita A. Bajura, Director National Energy Technology Laboratory www.netl.doe.gov 169330 RAB 09/09/02 2 Potential Mercury Regulations MACT Standards * Likely high levels of Hg reduction * Compliance: 2007 Clean Power Act of 2001 * 4-contaminant control * 90% Hg reduction by 2007 Clear Skies Act of 2002 * 3-contaminant control * 46% Hg reduction by 2010 * 70% Hg reduction by 2018 * Hg emission trading President Bush Announcing Clear Skies Initiative February 14, 2002 169330 RAB 09/09/02 3 Uncertainties Mercury Control Technologies * Balance-of-plant impacts * By-product use and disposal * Capture effectiveness with low-rank coals * Confidence of performance 169330 RAB 09/09/02 4

266

Residential Humidity Control Strategies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Residential Humidity Control Strategies Residential Humidity Control Strategies Armin Rudd Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas 2 Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas Humidity control goals  Comfort, and Indoor Air Quality  Control indoor humidity year-around, just like we do temperature  Durability and customer satisfaction  Reduce builder risk and warranty/service costs 2 3 Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas Humidity control challenges 1. In humid cooling climates, there will always be times of the year when there is little sensible cooling load to create thermostat demand but humidity remains high * Cooling systems that modify fan speed and temperature set point based on humidity can help but are still limited

267

Cyclic control stick  

DOE Patents (OSTI)

A cyclic control stick of the type used in helicopters for reducing the safety hazards associated with such a mechanism in the event of a crewman being thrown violently into contact with the cyclic control stick resulting from a crash or the like. The cyclic control stick is configured to break away upon the exertion of an impact force which exceeds a predetermined value and/or is exerted for more than a momentary time duration. The cyclic control stick is also configured to be adjustable so as to locate the grip thereof as far away from the crewman as possible for safety reasons without comprising the comfort of the crewman or the use of the control stick, and a crushable pad is provided on the top of the grip for impact energy absorbing purposes.

Whitaker, Charles N. (2834 S. Extension Rd., No. 2024, Mesa, AZ 85202); Zimmermann, Richard E. (425 E. Greenway, Tempe, AZ 85282)

1989-01-01T23:59:59.000Z

268

Control of Records  

NLE Websites -- All DOE Office Websites (Extended Search)

3 Control of Records Process 11_0304 Page 1 of 6 3 Control of Records Process 11_0304 Page 1 of 6 EOTA - Business Process Document Title: Control of Records Process Document Number P-003 Rev 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): REG-003, Records Register P-003 Control of Records Process 11_0304 Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 08_0805 Added Integration Group to Section III. 11_0304 Defined Record Creator and New Record for clarity and swapped Step 3.0 and 4.0 P-003 Control of Records Process 11_0304 Page 3 of 6 I. Purpose To describe the process for how records are established and maintained to provide evidence of conformity to requirements and

269

Surveillance Guides - Hazards Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hazards Control Hazards Control 1.0 Objective The objective of this surveillance is to evaluate the effectiveness of the contractor's programs and policy for establishing controls to mitigate hazards affecting the public, worker, and environment. 2.0 References 2.1 DOE 4330.4B Maintenance Management Program 2.2 48 CFR 1970.5204-2 Department of Energy Acquisition Regulations 3.0 Requirements Implemented This surveillance is conducted to verify implementation of DOE 450.4-1A Volume 2 Appendix E core expectation #3 (CE II-3). CE II-3: An integrated process has been established and is utilized to develop controls which mitigate the identified hazards present within a facility or activity. The set of controls ensure adequate protection of the public, worker, and the environment and are established as agreed upon by DOE.

270

Control systems under attack?  

E-Print Network (OSTI)

The enormous growth of the Internet during the last decade offers new means to share and distribute both information and data. In Industry, this results in a rapprochement of the production facilities, i.e. their Process Control and Automation Systems, and the data warehouses. At CERN, the Internet opens the possibility to monitor and even control (parts of) the LHC and its four experiments remotely from anywhere in the world. However, the adoption of standard IT technologies to Distributed Process Control and Automation Systems exposes inherent vulnerabilities to the world. The Teststand On Control System Security at CERN (TOCSSiC) is dedicated to explore the vulnerabilities of arbitrary Commercial-Of-The-Shelf hardware devices connected to standard Ethernet. As such, TOCSSiC should discover their vulnerabilities, point out areas of lack of security, and address areas of improvement which can then be confidentially communicated to manufacturers. This paper points out risks of accessing the Control and Automa...

Lders, Stefan

2005-01-01T23:59:59.000Z

271

Neural daylight control system  

E-Print Network (OSTI)

The paper describes the design, the implementation of a neural controller used in an automatic daylight control system. The automatic lighting control system (ALCS) attempt to maintain constant the illuminance at the desired level on working plane even if the daylight contribution is variable. Therefore, the daylight will represent the perturbation signal for the ALCS. The mathematical model of process is unknown. The applied structure of control need the inverse model of process. For this purpose it was used other artificial neural network (ANN) which identify the inverse model of process in an on-line manner. In fact, this ANN identify the inverse model of process + the perturbation signal. In this way the learning signal for neural controller has a better accuracy for the present application.

Grif, Horatiu Stefan

2010-01-01T23:59:59.000Z

272

A study of industrial equipment energy use and demand control  

E-Print Network (OSTI)

Demand and duty factors were measured for selected equipment [air compressors, electric furnaces, injection-molding machines, a welder, a granulator (plastics grinder), a sheet metal press and brake, a lathe, a process chiller, and cooling tower pumps and fans] in two industrial plants. Demand factors for heavily loaded air compressors were found to be near 100 %, for lightly loaded centrifugal equipment (lathe, sheet metal shear and brake, and granulator) near 10 %, and for injection-molding machines near 50 %. The measured demand factors differ from those often estimated during energy surveys. Duty factors for some equipment were found to exceed 100 %, showing that some loads were on for longer periods than that indicated by plant personnel. Comparing a detailed summary of equipment rated loads to annual utility bills, when measurements are not available, can prevent over-estimation of the demand and duty factors for a plant. Raw unadjusted estimates of demand factors of 60 % or higher are often made, yet comparisons of rated loads to utility bills show that some equipment demand factors may be 50 % or less. This project tested a simple beacon alerting system, which used a blue strobe light to alert plant personnel when a preset demand limit had been reached. Tests of load shedding verified that the estimated demand savings of 50 kVA were realized (out of a total demand of almost 1200 kVA) when lighting and air conditioning loads were turned off.

Dooley, Edward Scott

2001-01-01T23:59:59.000Z

273

Isotopically controlled semiconductors  

SciTech Connect

Semiconductor bulk crystals and multilayer structures with controlled isotopic composition have attracted much scientific and technical interest in the past few years. Isotopic composition affects a large number of physical properties, including phonon energies and lifetimes, bandgaps, the thermal conductivity and expansion coefficient and spin-related effects. Isotope superlattices are ideal media for self-diffusion studies. In combination with neutron transmutation doping, isotope control offers a novel approach to metal-insulator transition studies. Spintronics, quantum computing and nanoparticle science are emerging fields using isotope control.

Haller, Eugene E.

2001-12-21T23:59:59.000Z

274

Radiological Control Manual  

Science Conference Proceedings (OSTI)

This manual has been prepared by Lawrence Berkeley Laboratory to provide guidance for site-specific additions, supplements, and clarifications to the DOE Radiological Control Manual. The guidance provided in this manual is based on the requirements given in Title 10 Code of Federal Regulations Part 835, Radiation Protection for Occupational Workers, DOE Order 5480.11, Radiation Protection for Occupational Workers, and the DOE Radiological Control Manual. The topics covered are (1) excellence in radiological control, (2) radiological standards, (3) conduct of radiological work, (4) radioactive materials, (5) radiological health support operations, (6) training and qualification, and (7) radiological records.

Not Available

1993-04-01T23:59:59.000Z

275

Fermilab DART run control  

SciTech Connect

DART is the high speed, Unix based data acquisition system being developed by Fermilab in collaboration with seven High Energy Physics Experiments. This paper describes DART run control, which has been developed over the past year and is a flexible, distributed, extensible system for the, control and monitoring of the data acquisition systems. We discuss the unique and interesting concepts of the run control and some of our experiences in developing it. We also give a brief update and status of the whole DART system.

Oleynik, G.; Engelfried, J.; Mengel, L. [and others

1995-05-01T23:59:59.000Z

276

Flash protection controller  

DOE Patents (OSTI)

A controller provides a high voltage to maintain an electro-optic shutter in a transparent condition until a flash of light which would be harmful to personnel is sensed by a phototransistor. The controller then shorts the shutter to ground to minimize light transmission to the user and maintains light transmission at the pre-flash level for a predetermined time to allow the flash to subside. A log converter and differential trigger circuit keep the controller from being triggered by other light flashes which are not dangerous.

Galbraith, Lee K. (Mountain View, CA)

1981-01-01T23:59:59.000Z

277

Surface controlled blade stabilizer  

DOE Patents (OSTI)

Drill string stabilizer apparatus, controllable to expand and retract entirely from the surface by control of drill string pressure, wherein increase of drill string pressure from the surface closes a valve to create a piston means which is moved down by drill string pressure to expand the stabilizer blades, said valve being opened and the piston moving upward upon reduction of drill string pressure to retract the stabilizer blades. Upward and downward movements of the piston and an actuator sleeve therebelow are controlled by a barrel cam acting between the housing and the actuator sleeve.

Russell, Larry R. (6025 Edgemor, Suite C, Houston, TX 77081)

1983-01-01T23:59:59.000Z

278

Flash protection controller  

DOE Patents (OSTI)

A controller provides a high voltage to maintain an electro-optic shutter in a transparent condition until a flash of light which would be harmful to personnel is sensed by a phototransistor. The controller then shorts the shutter to ground to minimize light transmission to the user and maintains light transmission at the pre-flash level for a predetermined time to allow the flash to subside. A log converter and differential trigger circuit keep the controller from being triggered by other light flashes which are not dangerous.

Galbraith, L.K.

1979-12-07T23:59:59.000Z

279

Control of non-controllable quantum systems: A quantum control algorithm based on Grover iteration  

E-Print Network (OSTI)

A new notion of controllability, eigenstate controllability, is defined for finite-dimensional bilinear quantum mechanical systems which are neither strongly completely controllably nor completely controllable. And a quantum control algorithm based on Grover iteration is designed to perform a quantum control task of steering a system, which is eigenstate controllable but may not be (strongly) completely controllable, from an arbitrary state to a target state.

Chen-Bin Zhang; Dao-Yi Dong; Zong-Hai Chen

2005-03-02T23:59:59.000Z

280

Control of External Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Control of External Documents Process 11_0304 Page 1 of 5 2 Control of External Documents Process 11_0304 Page 1 of 5 EOTA - Business Process Document Title: Control of External Documents Process Document Number P-002 Rev 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): REG-002, External Document Register P-002 Control of External Documents Process 11_0304 Page 2 of 5 Revision History: Rev. Description of Change A Initial Release 11_0304 Changed revision format from alpha character to numbers; modified process to include a step directing addition to REG-002 External Document Register and changed verbiage to clarify and more accurately reflect current process.

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Media Inventory Control  

NLE Websites -- All DOE Office Websites (Extended Search)

8 Media Inventory Control 11_0406 Page 1 of 5 8 Media Inventory Control 11_0406 Page 1 of 5 EOTA - Business Process Document Title: Media Inventory Control Document Number: ITTP-018 Rev. 09_0910 Document Owner: Janet Lee Backup Owner: Ben Aragon Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: Referenced Document(s): MGTP-003 Customer Property, ISDP-002 Training Production Process, ADMP-001 Procurement Process, ADMP-003 Receiving/Inspection Process, ITTF-013 Media Requests ITTP-018 Media Inventory Control 11_0406 Page 2 of 5 Revision History: Rev. Description of Change A Initial Release B Added use of ITTF-013, Media Requests (SMS Records) 08_0904 Changed Media Specialist to Online Learning support Specialist (OLSS). Modified process to better fit actual media request process.

282

Stepping Motor Control System  

E-Print Network (OSTI)

This paper describes a hardware system designed to facilitate position and velocity control of a group of eight stepping motors using a PDP-11. The system includes motor driver cards and other interface cards in addition ...

Larson, Noble G.

283

Condenser Microbiofouling Control Handbook  

Science Conference Proceedings (OSTI)

Microbiofouling of condenser surfaces can substantially increase costs at electric power plants. This handbook is a consolidated source of information to support decisions that must be made to control microbiofouling.

1993-11-09T23:59:59.000Z

284

Personalized HVAC control system  

E-Print Network (OSTI)

We present a novel method of building comfort control, focused around the occupant. Custom sensing, communication, and actuation hardware were developed to locate users in a building, and measure various parameters directly ...

Feldmeier, Mark Christopher

285

Radiation: Radiation Control (Indiana)  

Energy.gov (U.S. Department of Energy (DOE))

It is the policy of the state to encourage the constructive uses of radiation and to control its harmful effects. This section contains regulations pertaining to the manufacture, use,...

286

Management Control Cover  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fees in the Idaho National Laboratory Contract OAS-M-06-07 August 2006 REPORT ON MANAGEMENT CONTROLS OVER PERFORMANCE FEES IN THE IDAHO NATIONAL LABORATORY CONTRACT TABLE OF...

287

Stochastically scalable flow control  

Science Conference Proceedings (OSTI)

Recent advances in the mathematical analysis of flow control have prompted the creation of the Scalable TCP (STCP) and Exponential RED (E-RED) algorithms. These are designed to be scalable under the popular deterministic delay ...

Thomas Voice

2009-10-01T23:59:59.000Z

288

Environment induced incoherent controllability  

E-Print Network (OSTI)

We prove that the environment induced entanglement between two non interacting, two-dimensional quantum systems S and P can be used to control the dynamics of S by means of the initial state of P. Using a simple, exactly solvable model, we show that both accessibility and controllability of S can be achieved under suitable conditions on the interaction of S and P with the environment.

Raffaele Romano; Domenico D'Alessandro

2005-11-08T23:59:59.000Z

289

Combustion oscillation control  

SciTech Connect

Premixing of fuel and air can avoid high temperatures which produce thermal NOx, but oscillating combustion must be eliminated. Combustion oscillations can also occur in Integrated Gasification Combined Cycle turbines. As an alternative to design or operating modifications, METC is investigating active combustion control (ACC) to eliminate oscillations; ACC uses repeated adjustment of some combustion parameter to control the variation in heat release that drives oscillations.

Richards, G.A.; Janus, M.C.

1996-12-31T23:59:59.000Z

290

Pit disassembly motion control  

Science Conference Proceedings (OSTI)

A Department of Energy (DOE) Pit Disassembly and Conversion Facility (PDCF) is being designed for the Savannah River Site in South Carolina. The facility will recover plutonium from excess nuclear weapon pits defined in START II and START III treaties. The plutonium will be stored and used to produce mixed oxide reactor fuel at another new DOE facility. Because of radiation dose issues, much of the pit disassembly work and material transfer will be automated. Automated material handling systems will interface with disassembly lathes, conversion reactors that produce oxide for storage, robotic container welding stations, vault retrieval systems, and nondestructive assay (NDA) instrumentation. The goal is to use common motion control hardware for material transfer and possibly common motion controllers for the unique PDCF systems. The latter is complicated by the different directions manufactures are considering for distributed control, such as Firewire, SERCOS, etc., and by the unique control requirements of machines such as lathes compared to controls for an integrated NDA system. The current design approach is to standardize where possible, use network cables to replace wire bundles where possible, but to first select hardware and motion controllers that meet specific machine or process requirements.

Christensen, L. (Lowell); Pittman, P. C. (Pete C.)

2001-01-01T23:59:59.000Z

291

Closing the Gap in Control System Implementations  

E-Print Network (OSTI)

Control Systems . . . . . . . . . . . . . . . . . .Continuous-Time Linear Control Systems . . . . .Discrete-Time Linear Control Systems . . . . . . . . . . .

Saha, Indranil

2013-01-01T23:59:59.000Z

292

Control the Robot Movement by Fuzzy Logic Controller  

Science Conference Proceedings (OSTI)

Recently, great interest has been the reluctance to move to DC motors and its applications in industry Such as robotics, textiles, and household electric vehicle or application or Aviation domains. The first control techniques used classic controllers ... Keywords: control, fuzzy logic controller, pid controller, dc motor, robot movement, simulation

Yousfi Khemissi; Amrani Abdulwahab

2010-03-01T23:59:59.000Z

293

Nonlinear continuous feedback controllers  

E-Print Network (OSTI)

Packet-switched communication networks such as today's Internet are built with several interconnected core and distribution packet forwarding routers and several sender and sink transport agents. In order to maintain stability and avoid congestion collapse in the network, the sources control their rate behavior and voluntarily adjust their sending rates to accommodate other sources in the network. In this thesis, we study one class of sender rate control that is modeled using continuous first-order differential equation of the sending rates. In order to adjust the rates appropriately, the network sends continuous packet-loss feedback to the sources. We study a form of closed-loop feedback congestion controllers whose rate adjustments exhibit a nonlinear form. There are three dimensions to our work in this thesis. First, we study the network optimization problem in which sources choose utilities to maximize their underlying throughput. Each sender maximizes its utility proportional to the throughput achieved. In our model, sources choose a utility function to define their level of satisfaction of the underlying resource usages. The objective of this direction is to establish the properties of source utility functions using inequality constrained bounded sets and study the functional forms of utilities against a chosen rate differential equation. Second, stability of the network and tolerance to perturbation are two essential factors that keep communication networks operational around the equilibrium point. Our objective in this part of the thesis is to analytically understand the existence of local asymptotic stability of delayed-feedback systems under homogeneous network delays. Third, we propose a novel tangential controller for a generic maximization function and study its properties using nonlinear optimization techniques. We develop the necessary theoretical background and the properties of our controller to prove that it is a better rate adaptation algorithm for logarithmic utilities compared to the well-studied proportional controllers. We establish the asymptotic local stability of our controller with upper bounds on the increase / decrease gain parameters.

Sitharaman, Sai Ganesh

2005-05-01T23:59:59.000Z

294

Supervisory Control Strategy Development  

SciTech Connect

Task 4 of this collaborative effort between ORNL, Brazil, and Westinghouse for the International Nuclear Energy Research Initiative entitled Development of Advanced Instrumentation and Control for an Integrated Primary System Reactor focused on the design of the hierarchical supervisory control for multiple-module units. The state of the IRIS plant design specifically, the lack of a detailed secondary system design made developing a detailed hierarchical control difficult at this time. However, other simultaneous and ongoing efforts have contributed to providing the needed information. This report summarizes the results achieved under Task 4 of this Financial Assistance Award. Section 1.2 describes the scope of this effort. Section 2 discusses the IRIS control functions. Next, it briefly reviews the current control concepts, and then reviews the maneuvering requirements for the IRIS plant. It closes by noting the benefits that automated sequences have in reducing operator workload. Section 3 examines reactor loading in the frequency domain to establish some guidelines for module operation, paying particular attention to strategies for using process steam for desalination and/or district heating. The final subsection discusses the implications for reactor control, and argues that using the envisioned percentage (up to 10%) of the NSSS thermal output for these purposes should not significantly affect the NSSS control strategies. Section 4 uses some very general economic assumptions to suggest how one should approach multi-module operation. It concludes that the well-known algorithms used for economic dispatching could be used to help manage a multi-unit IRIS site. Section 5 addresses the human performance factors of multi-module operation. Section 6 summarizes our conclusions.

Gary D. Storrick; Bojan Petrovic

2007-02-28T23:59:59.000Z

295

Aquatic plant control research  

DOE Green Energy (OSTI)

The Northwest region of the United States contains extensive canal systems that transport water for hydropower generation. Nuisance plants, including algae, that grow in these systems reduce their hydraulic capacity through water displacement and increased surface friction. Most control methods are applied in an ad hoc fashion. The goal of this work is to develop cost-effective, environmentally sound, long-term management strategies to prevent and control nuisance algal growth. This paper reports on a multi-year study, performed in collaboration with the Pacific Gas & Electric Company, to investigate algal growth in their canal systems, and to evaluate various control methodologies. Three types of controls, including mechanical, biological and chemical treatment, were selected for testing and evaluation. As part of this study, water quality data were collected and algal communities were sampled from numerous stations throughout the distribution system at regular intervals. This study resulted in a more comprehensive understanding of conditions leading to the development of nuisance algal growth, a better informed selection of treatment plans, and improved evaluation of the effectiveness for the control strategies selected for testing.

Pryfogle, P.A.; Rinehart, B.N. [Idaho National Engineering Lab., Idaho Falls, ID (United States); Ghio, E.G. [Pacific Gas & Electric Company, San Francisco, CA (United States). Hydro Generation Engineering

1997-05-01T23:59:59.000Z

296

Performance of microprocessor controllers  

SciTech Connect

United States animal production systems are at the threshold of a major new method for daily management of environmental control -- the integrated microprocessor-based environmental control system. Widespread adoption of this technology has the potential for dramatic improvement in production efficiencies through lower management costs, improved energy savings, and better feed conversion efficiencies. However, the technical problems of transient surge protection and appropriate mechanical backup systems have not been adequately addressed by the industry. The goals of this research were to identify the degree to which transient surge protection was being provided by current manufacturers, and to illustrate the implementation of microprocessor environmental control systems with mechanical backup. Transient open circuit over-voltage tests (ANSI/IEEE C62.41-1980) were performed on 16 environmental control units: a maximum of 800 V spike was applied to the power supplies, and up to 100 V spike applied to temperature sensor lines. Under these relatively mild tests, no failures were noted due to power supply transients, but three units failed when subjected to transients on their temperature sensor lines. Mechanical backup systems were designed to provide essential life-support during critical conditions of extreme outside conditions and extreme animal densities. The design and installation of environmental control systems for (1) a gestation unit and (2) a broiler house was performed. An overview of the process, and difficulties noted, is presented. Both systems incorporated mechanical backups. 20 refs.

Gates, R.S.; Turner, L.W.; Overhults, D.G. (Kentucky Univ., Lexington, KY (United States). Dept. of Agricultural Engineering)

1992-01-01T23:59:59.000Z

297

Low noise control valve  

SciTech Connect

Noise is one of the problems associated with the use of any type of control valve in systems involving the flow of fluids. The advent of OSHA standards has prompted control valve manufacturers to design valves with special trim to lower the sound pressure level to meet these standards. However, these levels are in some cases too high, particularly when a valve must be located in or near an area where people are working at tasks requiring a high degree of concentration. Such locations are found around and near research devices and in laboratory-office areas. This paper describes a type of fluid control device presently being used at PPL as a bypass control valve in deionized water systems and designed to reduce sound pressure levels considerably below OSHA standards. Details of the design and construction of this constant pressure drop variable flow control valve are contained in the text and are shown in photographs and drawings. Test data taken are included. (auth)

Christie, R.S.

1975-01-01T23:59:59.000Z

298

Nuclear reactor control column  

DOE Patents (OSTI)

The nuclear reactor control column comprises a column disposed within the nuclear reactor core having a variable cross-section hollow channel and containing balls whose vertical location is determined by the flow of the reactor coolant through the column. The control column is divided into three basic sections wherein each of the sections has a different cross-sectional area. The uppermost section of the control column has the greatest cross-sectional area, the intermediate section of the control column has the smallest cross-sectional area, and the lowermost section of the control column has the intermediate cross-sectional area. In this manner, the area of the uppermost section can be established such that when the reactor coolant is flowing under normal conditions therethrough, the absorber balls will be lifted and suspended in a fluidized bed manner in the upper section. However, when the reactor coolant flow falls below a predetermined value, the absorber balls will fall through the intermediate section and into the lowermost section, thereby reducing the reactivity of the reactor core and shutting down the reactor.

Bachovchin, Dennis M. (Plum Borough, PA)

1982-01-01T23:59:59.000Z

299

Broadband accelerator control network  

SciTech Connect

A broadband data communications network has been implemented at BNL for control of the Alternating Gradient Synchrotron (AG) proton accelerator, using commercial CATV hardware, dual coaxial cables as the communications medium, and spanning 2.0 km. A 4 MHz bandwidth Digital Control channel using CSMA-CA protocol is provided for digital data transmission, with 8 access nodes available over the length of the RELWAY. Each node consists of an rf modem and a microprocessor-based store-and-forward message handler which interfaces the RELWAY to a branch line implemented in GPIB. A gateway to the RELWAY control channel for the (preexisting) AGS Computerized Accelerator Operating system has been constructed using an LSI-11/23 microprocessor as a device in a GPIB branch line. A multilayer communications protocol has been defined for the Digital Control Channel, based on the ISO Open Systems Interconnect layered model, and a RELWAY Device Language defined as the required universal language for device control on this channel.

Skelly, J.; Clifford, T.; Frankel, R.

1983-01-01T23:59:59.000Z

300

Instrumentation and Control Solutions for Optimizing Steam Temperature Control  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute and Southern Company are executing a comprehensive program to improve main steam temperature control on drum boilers. The program includes assessing and improving the performance of instrumentation, control valves, proportional-integral-derivative control strategies, controller tuning, model predictive control (MPC), and operational aspects affecting steam temperature control. Substantial plant testing, data analysis, and other work have been conducted to date. This ...

2011-12-23T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

SNS Control Group, Spallation Neutron Source, SNS  

NLE Websites -- All DOE Office Websites (Extended Search)

Control Group at Brookhaven Global Controls References SNS PowerSupply Control - John Smith SNS Diagnostics Control - Peter Cameron SNS Vacuum Control - Johnny Tang SNS Database...

302

Transactive Control and Coordination  

NLE Websites -- All DOE Office Websites (Extended Search)

Transactive Control and Coordination Transactive Control and Coordination Speaker(s): Robert Pratt Date: March 15, 2013 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Mary Ann Piette Transactive control and coordination is PNNL's approach to operationalizing smart grid distributed assets. It is a specific case of the general class of techniques the GridWise Architecture Council refers to as transactive energy - "techniques for managing the generation, consumption or flow of electric power within an electric power system through the use of economic- or market-based constructs, with full consideration of grid reliability constraints. The term "transactive" comes from considering that decisions are made based on a value. These decisions may be analogous to or literally economic

303

REACTOR CONTROL DEVICE  

DOE Patents (OSTI)

A wholly mechanical compact control device is designed for automatically rendering the core of a fission reactor subcritical in response to core temperatures in excess of the design operating temperature limit. The control device comprises an expansible bellows interposed between the base of a channel in a reactor core and the inner end of a fuel cylinder therein which is normally resiliently urged inwardly. The bellows contains a working fluid which undergoes a liquid to vapor phase change at a temperature substantially equal to the design temperature limit. Hence, the bellows abruptiy expands at this limiting temperature to force the fuel cylinder outward and render the core subcritical. The control device is particularly applicable to aircraft propulsion reactor service. (AEC)

Graham, R.H.

1962-09-01T23:59:59.000Z

304

Energy saving furnace controller  

Science Conference Proceedings (OSTI)

This patent describes a forced air heating system including a furnace controlled by a household thermostat. The furnace includes a burner, burning valve, heat exchanger, plenum and fan for circulating air through the heat exchanger and plenum. An auxiliary controller comprises: relay means connectable between the household thermostat and the furnace burner valve; and timing means for controlling the duty cycle of the furnace burner valve by opening and closing the relay. The timing means includes means for timing alternating first and second intervals, the first interval at least substantially equal to the length of time the furnace delays between a cell for heat from the household thermostat and the start of the furnace fan when the furnace is started from a cool state. The second interval corresponds to a percentage of the first interval.

Johnson, H.R.; Lombardi, S.E.

1987-05-26T23:59:59.000Z

305

Automatic lighting controls demonstration  

SciTech Connect

The purpose of this work was to demonstrate, in a real building situation, the energy and peak demand reduction capabilities of an electronically ballasted lighting control system that can utilize all types of control strategies to efficiently manage lighting. The project has demonstrated that a state-of-the-art electronically ballasted dimmable lighting system can reduce energy and lighting demand by as least 50% using various combinations of control strategies. By reducing light levels over circulation areas (tuning) and reducing after hours light levels to accommodate the less stringent lighting demands of the cleaning crew (scheduling), lighting energy consumption on weekdays was reduced an average of 54% relative to the initial condition. 10 refs., 14 figs., 3 tabs.

Rubinstein, F.; Verderber, R.

1990-03-01T23:59:59.000Z

306

Electric turbocompound control system  

DOE Patents (OSTI)

Turbocompound systems can be used to affect engine operation using the energy in exhaust gas that is driving the available turbocharger. A first electrical device acts as a generator in response to turbocharger rotation. A second electrical device acts as a motor to put mechanical power into the engine, typically at the crankshaft. Apparatus, systems, steps, and methods are described to control the generator and motor operations to control the amount of power being recovered. This can control engine operation closer to desirable parameters for given engine-related operating conditions compared to actual. The electrical devices can also operate in "reverse," going between motor and generator functions. This permits the electrical device associated with the crankshaft to drive the electrical device associated with the turbocharger as a motor, overcoming deficient engine operating conditions such as associated with turbocharger lag.

Algrain, Marcelo C. (Dunlap, IL)

2007-02-13T23:59:59.000Z

307

SERVOMOTOR CONTROL SYSTEM  

DOE Patents (OSTI)

Control systems for automatic positioning of an electric motor operated vapor valve are described which is operable under the severe conditions existing in apparatus for electro-magnetlcally separating isotopes. In general, the system includes a rotor for turning the valve comprising two colls mounted mutually perpendicular to each other and also perpendicular to the magnetic field of the isotope separating apparatus. The coils are furnished with both a-c and d- c current by assoclate control circuitry and a position control is provided for varying the ratlo of the a-c currents in the coils and at the same time, but in an inverse manner, the ratio between the d-c currents in the coils is varied. With the present system the magnitude of the motor torque is constant for all valves of the rotor orientatlon angle.

MacNeille, S.M.

1958-12-01T23:59:59.000Z

308

Voltage controlled current source  

DOE Patents (OSTI)

A seven decade, voltage controlled current source is described for use in testing intermediate range nuclear instruments that covers the entire test current range of from 10 picoamperes to 100 microamperes. High accuracy is obtained throughout the entire seven decades of output current with circuitry that includes a coordinated switching scheme responsive to the input signal from a hybrid computer to control the input voltage to an antilog amplifier, and to selectively connect a resistance to the antilog amplifier output to provide a continuous output current source as a function of a preset range of input voltage. An operator controlled switch provides current adjustment for operation in either a real-time simulation test mode or a time response test mode.

Casne, Gregory M. (Pittsburgh, PA)

1992-01-01T23:59:59.000Z

309

Dynamic control of grid power flow using controllable network transformers .  

E-Print Network (OSTI)

??The objective of the research is to develop a cost-effective, dynamic grid controller called the controllable network transformer (CNT) that can be implemented by augmenting (more)

Das, Debrup

2011-01-01T23:59:59.000Z

310

Lighting Group: Controls: IBECS  

NLE Websites -- All DOE Office Websites (Extended Search)

IBECS IBECS Integrated Building Environmental Communications System Objective The overall technical goal of the IBECS project is to develop an integrated building equipment communications network that will allow appropriate automation of lighting and envelope systems to increase energy efficiency, improve building performance, and enhance occupant experience in the space. This network will provide a low-cost means for occupants to control local lighting and window systems, thereby improving occupant comfort, satisfaction and performance. A related goal is to improve existing lighting control components and accelerate development of new daylighting technologies that will allow daylighting to be more extensively applied to a larger proportion of building floor space.

311

AUTOMATIC LIGHT CONTROL  

DOE Patents (OSTI)

A control system for a projection kinescope used in a facsimile scanning system and, in particular, meams for maintaining substantially constant the light emanating from the flying spot on the face of the kinescope are described. In general, the invention provides a feeler member disposed in such a position with respect to a projecting lens as to intercept a portion of the light striking the lens. Suitable circuitry in conjunction with a photomultiplier tube provides a signal proportional to the light intensity of the flying spot. The grid bias on the kinescope is controlled by this signal to maintain the intensity of the spot substantially constant.

Artzt, M.

1957-08-27T23:59:59.000Z

312

SAP for Mercury Control  

Science Conference Proceedings (OSTI)

EPRI and the Illinois State Geological Survey (ISGS) have developed and patented a technology for the on-site production of activated carbon (AC). The basic approach of the sorbent activation process (SAP) is to use coal from the plant site to form AC for direct injection into flue gas, upstream of the particulate control device, for mercury adsorption. The SAP is designed to help significantly reduce the cost of AC for power plant mercury control. This report summarizes laboratory and Phase 1 field test...

2009-06-17T23:59:59.000Z

313

The Epicure Control System  

SciTech Connect

The Epicure Control System supports the Fermilab fixed target physics program. The system is distributed across a network of many different types of components. The use of multiple layers on interfaces for communication between logical tasks fits the client-server model. Physical devices are read and controlled using symbolic references entered into a database with an editor utility. The database system consists of a central portion containing all device information and optimized portions distributed among many nodes. Updates to the database are available throughout the system within minutes after being requested.

Dambik, E.; Kline, D.; West, R.

1993-09-01T23:59:59.000Z

314

Experimentally realizable control fields in quantum Lyapunov control  

E-Print Network (OSTI)

As a hybrid of techniques from open-loop and feedback control, Lyapunov control has the advantage that it is free from the measurement-induced decoherence but it includes the system's instantaneous message in the control loop. Often, the Lyapunov control is confronted with time delay in the control fields and difficulty in practical implementations of the control. In this paper, we study the effect of time-delay on the Lyapunov control, and explore the possibility of replacing the control field with a pulse train or a bang-bang signal. The efficiency of the Lyapunov control is also presented through examining the convergence time of the controlled system. These results suggest that the Lyapunov control is robust gainst time delay, easy to realize and effective for high-dimensional quantum systems.

X. X. Yi; S. L. Wu; Chunfeng Wu; X. L. Feng; C. H. Oh

2011-02-24T23:59:59.000Z

315

Experimentally realizable control fields in quantum Lyapunov control  

E-Print Network (OSTI)

As a hybrid of techniques from open-loop and feedback control, Lyapunov control has the advantage that it is free from the measurement-induced decoherence but it includes the system's instantaneous message in the control loop. Often, the Lyapunov control is confronted with time delay in the control fields and difficulty in practical implementations of the control. In this paper, we study the effect of time-delay on the Lyapunov control, and explore the possibility of replacing the control field with a pulse train or a bang-bang signal. The efficiency of the Lyapunov control is also presented through examining the convergence time of the controlled system. These results suggest that the Lyapunov control is robust gainst time delay, easy to realize and effective for high-dimensional quantum systems.

Yi, X X; Wu, Chunfeng; Feng, X L; Oh, C H

2011-01-01T23:59:59.000Z

316

Thermophotovoltaic Spectral Control  

DOE Green Energy (OSTI)

Spectral control is a key technology for thermophotovoltaic (TPV) direct energy conversion systems because only a fraction (typically less than 25%) of the incident thermal radiation has energy exceeding the diode bandgap energy, E{sub g}, and can thus be converted to electricity. The goal for TPV spectral control in most applications is twofold: (1) Maximize TPV efficiency by minimizing transfer of low energy, below bandgap photons from the radiator to the TPV diode. (2) Maximize TPV surface power density by maximizing transfer of high energy, above bandgap photons from the radiator to the TPV diode. TPV spectral control options include: front surface filters (e.g. interference filters, plasma filters, interference/plasma tandem filters, and frequency selective surfaces), back surface reflectors, and wavelength selective radiators. System analysis shows that spectral performance dominates diode performance in any practical TPV system, and that low bandgap diodes enable both higher efficiency and power density when spectral control limitations are considered. Lockheed Martin has focused its efforts on front surface tandem filters which have achieved spectral efficiencies of {approx}83% for E{sub g} = 0.52 eV and {approx}76% for E{sub g} = 0.60 eV for a 950 C radiator temperature.

DM DePoy; PM Fourspring; PF Baldasaro; JF Beausang; EJ Brown; MW Dashiel; KD Rahner; TD Rahmlow; JE Lazo-Wasem; EJ Gratrix; B Wemsman

2004-06-09T23:59:59.000Z

317

Controlling Graphene's Electronic Structure  

NLE Websites -- All DOE Office Websites (Extended Search)

Controlling Graphene's Electronic Structure Print Controlling Graphene's Electronic Structure Print Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has enormous potential for use in ultrafast electronic transistors. It exhibits high conductivity and an anomalous quantum Hall effect (a phenomenon exhibited by certain semiconductor devices at low temperatures and high magnetic fields). Among its novel properties, graphene's electrical charge carriers (electrons and holes) move through a solid with effectively zero mass and constant velocity, like photons. Graphene's intrinsically low scattering rate from defects implies the possibility of a new kind of electronics based on the manipulation of electrons as waves rather than particles. The primary technical difficulty has been controlling the transport of electrical charge carriers through the sheet. This area of research is known as bandgap engineering. While bandgap engineering is the basis of semiconductor technology, it is only now being applied to graphene. Using angle-resolved photoemission spectroscopy (ARPES) at ALS Beamline 7.0.1, a team of scientists from the ALS and Germany characterized the electronic band structure and successfully controlled the gap between valence and conduction bands in a bilayer of graphene thin films deposited on a substrate of silicon carbide. This was done by doping one sheet with adsorbed potassium atoms, creating an asymmetry between the two layers.

318

Control rod studies  

SciTech Connect

This study was undertaken to answer questions asked regarding the required rod stroke for control of modified Tory II-C reactors. All problems described were solved with the Angie code and based on Tory-II-C design problems, RZ 501 and RZ 502, representing hot and cold reactors respectively.

Cole, A.

1963-02-28T23:59:59.000Z

319

Ultrastable neuroendocrine robot controller  

Science Conference Proceedings (OSTI)

The work of a simulated neuroendocrine controller with ultrastable neurons and glands is sketched and tested in terms of stability and adaptability. The artificial neurons connect to each other and to motors, while hormones produced by behaviour-related ... Keywords: Distributed adaptation, hormonal modulation, ultrastability

Lenka Pitonakova

2013-02-01T23:59:59.000Z

320

Switching between stabilizing controllers  

Science Conference Proceedings (OSTI)

This paper deals with the problem of switching between several linear time-invariant (LTI) controllers-all of them capable of stabilizing a specific LTI process-in such a way that the stability of the closed-loop system is guaranteed for any switching ... Keywords: Hybrid systems, Impulse system, Realization theory, Stability theory, Switched systems

JoO P. Hespanha; A.Stephen Morse

2002-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Adaptive sequential controller  

Science Conference Proceedings (OSTI)

An adaptive sequential controller for controlling a circuit breaker or other switching device to substantially eliminate transients on a distribution line caused by closing and opening the circuit breaker. The device adaptively compensates for changes in the response time of the circuit breaker due to aging and environmental effects. A potential transformer provides a reference signal corresponding to the zero crossing of the voltage waveform, and a phase shift comparator circuit compares the reference signal to the time at which any transient was produced when the circuit breaker closed, producing a signal indicative of the adaptive adjustment that should be made. Similarly, in controlling the opening of the circuit breaker, a current transformer provides a reference signal that is compared against the time at which any transient is detected when the circuit breaker last opened. An adaptive adjustment circuit produces a compensation time that is appropriately modified to account for changes in the circuit breaker response, including the effect of ambient conditions and aging. When next opened or closed, the circuit breaker is activated at an appropriately compensated time, so that it closes when the voltage crosses zero and opens when the current crosses zero, minimizing any transients on the distribution line. Phase angle can be used to control the opening of the circuit breaker relative to the reference signal provided by the potential transformer. 15 figs.

El-Sharkawi, M.A.; Xing, J.; Butler, N.G.; Rodriguez, A.

1994-11-01T23:59:59.000Z

322

Mercury Control Update 2009  

Science Conference Proceedings (OSTI)

EPRI has been evaluating cost-effective methods for reducing mercury emissions from coal-fired power plants. This report summarizes the current status of mercury control technologies and offers detailed discussion of boiler bromide addition balance-of-plant impacts and activated carbon injection (ACI) tests at selected sites.

2009-12-14T23:59:59.000Z

323

Adaptive sequential controller  

DOE Patents (OSTI)

An adaptive sequential controller (50/50') for controlling a circuit breaker (52) or other switching device to substantially eliminate transients on a distribution line caused by closing and opening the circuit breaker. The device adaptively compensates for changes in the response time of the circuit breaker due to aging and environmental effects. A potential transformer (70) provides a reference signal corresponding to the zero crossing of the voltage waveform, and a phase shift comparator circuit (96) compares the reference signal to the time at which any transient was produced when the circuit breaker closed, producing a signal indicative of the adaptive adjustment that should be made. Similarly, in controlling the opening of the circuit breaker, a current transformer (88) provides a reference signal that is compared against the time at which any transient is detected when the circuit breaker last opened. An adaptive adjustment circuit (102) produces a compensation time that is appropriately modified to account for changes in the circuit breaker response, including the effect of ambient conditions and aging. When next opened or closed, the circuit breaker is activated at an appropriately compensated time, so that it closes when the voltage crosses zero and opens when the current crosses zero, minimizing any transients on the distribution line. Phase angle can be used to control the opening of the circuit breaker relative to the reference signal provided by the potential transformer.

El-Sharkawi, Mohamed A. (Renton, WA); Xing, Jian (Seattle, WA); Butler, Nicholas G. (Newberg, OR); Rodriguez, Alonso (Pasadena, CA)

1994-01-01T23:59:59.000Z

324

Electrical Demand Control  

E-Print Network (OSTI)

Almost every building owner or manager is interested in controlling electrical costs. Since the HVAC system is a large user of electricity, this article will discuss what can be done in the HVAC system to influence parts of the utility bill.

Eppelheimer, D. M.

1984-01-01T23:59:59.000Z

325

Contamination control device  

DOE Patents (OSTI)

A contamination control device for use in a gas-insulated transmission bus consisting of a cylindrical center conductor coaxially mounted within a grounded cylindrical enclosure. The contamination control device is electrically connected to the interior surface of the grounded outer shell and positioned along an axial line at the lowest vertical position thereon. The contamination control device comprises an elongated metallic member having a generally curved cross-section in a first plane perpendicular to the axis of the bus and having an arcuate cross-section in a second plane lying along the axis of the bus. Each opposed end of the metallic member and its opposing sides are tapered to form a pair of generally converging and downward sloping surfaces to trap randomly moving conductive particles in the relatively field-free region between the metallic member and the interior surface of the grounded outer shell. The device may have projecting legs to enable the device to be spot welded to the interior of the grounded housing. The control device provides a high capture probability and prevents subsequent release of the charged particles after the capture thereof.

Clark, Robert M. (Ligonier, PA); Cronin, John C. (Greensburg, PA)

1977-01-01T23:59:59.000Z

326

Radionuclide deposition control  

DOE Patents (OSTI)

The deposition of radionuclides manganese-54, cobalt-58 and cobalt-60 from liquid sodium coolant is controlled by providing surfaces of nickel or high nickel alloys to extract the radionuclides from the liquid sodium, and by providing surfaces of tungsten, molybdenum or tantalum to prevent or retard radionuclide deposition.

Brehm, William F. (Richland, WA); McGuire, Joseph C. (Richland, WA)

1980-01-01T23:59:59.000Z

327

NEUTRONIC REACTOR CONTROL ELEMENT  

DOE Patents (OSTI)

A boron-10 containing reactor control element wherein the boron-10 is dispersed in a matrix material is describeri. The concentration of boron-10 in the matrix varies transversely across the element from a minimum at the surface to a maximum at the center of the element, prior to exposure to neutrons. (AEC)

Beaver, R.J.; Leitten, C.F. Jr.

1962-04-17T23:59:59.000Z

328

Framing robot arms control  

Science Conference Proceedings (OSTI)

The development of autonomous, robotic weaponry is progressing rapidly. Many observers agree that banning the initiation of lethal activity by autonomous weapons is a worthy goal. Some disagree with this goal, on the grounds that robots may equal and ... Keywords: Autonomous weapons, Machine ethics, Military robots, Moral machines, Operational morality, Robot arms control

Wendell Wallach; Colin Allen

2013-06-01T23:59:59.000Z

329

Lighting Group: Controls: Systems Integration  

NLE Websites -- All DOE Office Websites (Extended Search)

Systems Integration Building Control Systems Integration Objective This research project investigates how diverse building control systems can be integrated to provide seamless...

330

Solar Control Thin Films Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Sputtering equipment Solar Control Thin Films Laboratory The Solar Control Thin Films lab develops novel thin film coatings, deposition technologies, and device systems for...

331

Superconducting VAR control. [Patent application  

DOE Patents (OSTI)

Static VAR control means are described employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

Boenig, H.J.; Hassenzahl, W.V.

1980-12-05T23:59:59.000Z

332

BCDA Beamline Control related meetings  

NLE Websites -- All DOE Office Websites (Extended Search)

Control related meetings 071410 APS Upgrade Technical Seminar Series Beamline Control Software and Software Infrastructure (pdf) - Claude Saunders and Pete Jemian 050210 2010...

333

Document Control Template-Instruction  

NLE Websites -- All DOE Office Websites (Extended Search)

2ADocument Control Template - Instruction.doc Page 1 of 6 EOTA - Business Instruction Document Title: Document Control Template - Instruction Document Number: F-002 Rev. A...

334

Document Control Template-Form  

NLE Websites -- All DOE Office Websites (Extended Search)

4Document Control Template - Form 110815.doc 110815 Page 1 of 5 EOTA - Business Form Document Title: Document Control Template - Form Document Number: F-004 Rev. 110815...

335

Stored program digital process controller  

DOE Patents (OSTI)

A digital process control function generator wherein a timing clock, in conjunction with programmable read only memories controls variables in a process with respect to time.

Stephenson, Dwight L. (Los Alamos, NM)

1977-01-04T23:59:59.000Z

336

NETL: Advanced NOx Emissions Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Advanced NOx Emissions Control Innovations for Existing Plants Advanced NOx Emissions Control Adv....

337

Control of binary distillation column using fuzzy PI controllers  

Science Conference Proceedings (OSTI)

In this paper the automatic control of a binary distillation column is described. This control is done with fuzzy logic controllers. After a short explanation of the function and dynamic of a binary distillation column, it's operating and control strategies ... Keywords: binary distillation column, fuzzy inference system, simulation

Shahram Javadi; Jabber Hosseini

2009-08-01T23:59:59.000Z

338

ELECTRONIC CONTROLLER DEVELOPMENT AND EVALUATION OF CONTROL STRATEGIES  

E-Print Network (OSTI)

ector using solar insolation data, weather data, measuredsimulated weather and load conditions to test solar control

Wahlig, M.

2011-01-01T23:59:59.000Z

339

Intelligent Actuation Control Using Model-Free Adaptive Control Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Intelligent Actuation Control Using Intelligent Actuation Control Using Model-Free Adaptive Control Technology Background The Advanced Research Sensors and Controls Program is leading the effort to develop sensing and control technologies and methods to achieve seamlessly integrated and intelligent power systems. The program is led by the U.S. Department of Energy (DOE) Office of Fossil Energy National Energy Technology Laboratory (NETL) and is implemented

340

Securing Control Systems Modems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Recommended Practice for Securing Recommended Practice for Securing Control System Modems January 2008 iii ABSTRACT This paper addresses an often overlooked "backdoor" into critical infrastructure control systems created by modem connections. A modem's connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods. iv ACKNOWLEDGEMENT This document was developed for the U.S. Department of Homeland

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Steam turbine control  

SciTech Connect

In a power plant which includes a steam turbine with main control valves for admitting steam into the steam turbine and a steam bypass with bypass control valves for diverting steam around the steam turbine directly into a condenser, it is necessary to coordinate the operation of the respective valves so that the steam turbine can be started, brought up to speed, synchronized with a generator and then loaded as smoothly and efficiently as possible. The present invention provides for such operation and, in addition, allows for the transfer of power plant operation from the so-called turbine following mode to the boiler following mode through the use of the sliding pressure concept. The invention described is particularly applicable to combined cycle power plants.

Priluck, D.M.; Wagner, J.B.

1982-05-11T23:59:59.000Z

342

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Documentation Documentation ............................................................................2.01-1 Module 2.02 Communication Systems ..................................................................................2.02-1 Module 2.03 Counting Errors and Statistics ..........................................................................2.03-1 Module 2.04 Dosimetry .........................................................................................................2.04-1 Module 2.05 Contamination Control .....................................................................................2.05-1 Module 2.06 Airborne Sampling Program/Methods .............................................................2.06-1 Module 2.07 Respiratory Protection ......................................................................................2.07-1

343

Controlled CO preferential oxidation  

DOE Green Energy (OSTI)

Method for controlling the supply of air to a PROX reactor for the preferential oxidation in the presence of hydrogen wherein the concentration of the hydrogen entering and exiting the PROX reactor is monitored, the difference therebetween correlated to the amount of air needed to minimize such difference, and based thereon the air supply to the PROX reactor adjusted to provide such amount and minimize such difference.

Meltser, Mark A. (Pittsford, NY); Hoch, Martin M. (Webster, NY)

1997-01-01T23:59:59.000Z

344

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Documentation ............................................................................2.01-1 Documentation ............................................................................2.01-1 Module 2.02 Communication Systems ..................................................................................2.02-1 Module 2.03 Counting Errors and Statistics ..........................................................................2.03-1 Module 2.04 Dosimetry .........................................................................................................2.04-1 Module 2.05 Contamination Control .....................................................................................2.05-1 Module 2.06 Airborne Sampling Program/Methods .............................................................2.06-1 Module 2.07 Respiratory Protection ......................................................................................2.07-1

345

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Radiological Control Technician Training Facility Practical Training Attachment Phase IV Coordinated and Conducted for the Office of Health, Safety and Security U.S. Department of Energy DOE-HDBK-1122-2009 ii This page intentionally left blank DOE-HDBK-1122-2009 iii Table of Contents Page Introduction................................................................................................................................1 Facility Job Performance Measures ........................................................................................2 Final Verification Signatures ....................................................................................................3 DOE-HDBK-1122-2009 iv

346

Residential Gateways and Controllers  

Science Conference Proceedings (OSTI)

Energy companies are exploring two-way residential communications to help reduce the cost of providing standard energy-related services, such as itemized billing or demand reduction, as well as to provide nontraditional services, such as diagnostic services and e-mail. This report covers the key to development of these services -- residential gateways and controllers. The report was prepared with both technical and financial energy company managers in mind, for use as a reference tool and strategic plann...

1999-08-31T23:59:59.000Z

347

Radiation Field Control Manual  

Science Conference Proceedings (OSTI)

The EPRI Radiation Management Program is dedicated to reducing nuclear power plant worker personnel exposure by developing practices and technologies to increase the radiation protection of the worker, and to implement methods to reduce radiation fields. The nuclear power industry has recently implemented the RP2020 Initiative to promote positive radiation protection trends. Control of radiation fields is crucial to one of the initiative goals of reducing exposure. This manual provides the current state ...

2004-12-16T23:59:59.000Z

348

Controlled CO preferential oxidation  

DOE Patents (OSTI)

Method is described for controlling the supply of air to a PROX (PReferential OXidation for CO cleanup) reactor for the preferential oxidation in the presence of hydrogen wherein the concentration of the hydrogen entering and exiting the PROX reactor is monitored, the difference there between correlated to the amount of air needed to minimize such difference, and based thereon the air supply to the PROX reactor adjusted to provide such amount and minimize such difference. 2 figs.

Meltser, M.A.; Hoch, M.M.

1997-06-10T23:59:59.000Z

349

CONTROL MEANS FOR REACTOR  

DOE Patents (OSTI)

An apparatus for controlling a nuclear reactor includes a tank just below the reactor, tubes extending from the tank into the reactor, and a thermally expansible liquid neutron absorbent material in the tank. The liquid in the tank is exposed to a beam of neutrons from the reactor which heats the liquid causing it to expand into the reactor when the neutron flux in the reactor rises above a predetermincd danger point. Boron triamine may be used for this purpose.

Manley, J.H.

1961-06-27T23:59:59.000Z

350

CONTROL ROD DRIVE  

DOE Patents (OSTI)

BS>A drive mechanism was invented for the control rod of a nuclear reactor. Power is provided by an electric motor and an outside source of fluid pressure is utilized in conjunction with the fluid pressure within the reactor to balance the loadings on the motor. The force exerted on the drive mechanism in the direction of scramming the rod is derived from the reactor fluid pressure so that failure of the outside pressure source will cause prompt scramming of the rod.

Chapellier, R.A.

1960-05-24T23:59:59.000Z

351

Stirling engine power control  

DOE Patents (OSTI)

A power control method and apparatus for a Stirling engine including a valved duct connected to the junction of the regenerator and the cooler and running to a bypass chamber connected between the heater and the cylinder. An oscillating zone of demarcation between the hot and cold portions of the working gas is established in the bypass chamber, and the engine pistons and cylinders can run cold.

Fraser, James P. (Scotia, NY)

1983-01-01T23:59:59.000Z

352

Mercury Control Update 2010  

Science Conference Proceedings (OSTI)

A February 2008 decision by the U.S. District of Columbia Circuit Court of Appeals remanded the Clean Air Mercury Rule back to the U.S. Environmental Protection Agency, opening the possibility of more stringent federal emission limits similar to those already adopted by some states. To meet these stringent limits, high mercury removals based on Maximum Achievable Control Technology for individual power plants may be needed. To help electric power companies comply with tightening emission standards in a ...

2010-12-31T23:59:59.000Z

353

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7of 9 7of 9 Radiological Control Technician Training Practical Training Phase II Coordinated and Conducted for the Office of Health, Safety and Security U.S. Department of Energy DOE-HDBK-1122-2009 ii Table of Contents Page Introduction.............................................................................. ......1 Development of Job Performance Measures (JPMs)............................ .....1 Conduct Job Performance Evaluation...................................................3 Qualification Area: Radiological Instrumentation.......................................5 Task 2-1.................. ..................................................................... 5 Objective.............................................................................. 5

354

TRANSIENT CONTROL LEVEL PHILOSOPHY AND ...  

Science Conference Proceedings (OSTI)

Page 1. TRANSIENT CONTROL LEVEL PHILOSOPHY AND IMPLEMENTATION II. Techniques and Equipment for Making TCL Tests ...

2013-05-17T23:59:59.000Z

355

Weed Control Recommendations in Wheat  

E-Print Network (OSTI)

This publication offers suggestions for controlling weeds in wheat using cultural, mechanical and chemical methods.

Morgan, Gaylon; Baumann, Paul A.; Baughman, Todd; Bean, Brent W.

2008-06-05T23:59:59.000Z

356

Automated manual transmission controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI); Reed, Jr., Richard G. (Royal Oak, MI); Bernier, David R. (Rochester Hills, MI)

1999-12-28T23:59:59.000Z

357

Crawling the Control System  

SciTech Connect

Information about accelerator operations and the control system resides in various formats in a variety of places on the lab network. There are operating procedures, technical notes, engineering drawings, and other formal controlled documents. There are programmer references and API documentation generated by tools such as doxygen and javadoc. There are the thousands of electronic records generated by and stored in databases and applications such as electronic logbooks, training materials, wikis, and bulletin boards and the contents of text-based configuration files and log files that can also be valuable sources of information. The obvious way to aggregate all these sources is to index them with a search engine that users can then query from a web browser. Toward this end, the Google "mini" search appliance was selected and implemented because of its low cost and its simple web-based configuration and management. In addition to crawling and indexing electronic documents, the appliance provides an API that has been used to supplement search results with live control system data such as current values of EPICS process variables and graphs of recent data from the archiver.

Theodore Larrieu

2009-10-01T23:59:59.000Z

358

Control Complexity in Fallback Voting  

E-Print Network (OSTI)

We study the control complexity of fallback voting. Like manipulation and bribery, electoral control describes ways of changing the outcome of an election; unlike manipulation or bribery attempts, control actions---such as adding/deleting/partitioning either candidates or voters---modify the participative structure of an election. Via such actions one can try to either make a favorite candidate win ("constructive control") or prevent a despised candidate from winning ("destructive control"). Computational complexity can be used to protect elections from control attempts, i.e., proving an election system resistant to some type of control shows that the success of the corresponding control action, though not impossible, is computationally prohibitive. We show that fallback voting, an election system combining approval with majority voting, is resistant to each of the common types of candidate control and to each common type of constructive control. Among natural election systems with a polynomial-time winner pr...

Erdlyi, Gbor; Rothe, Jrg

2010-01-01T23:59:59.000Z

359

Demonstration and Evaluation of U.S. Postal Service Electric...  

NLE Websites -- All DOE Office Websites (Extended Search)

is summarized as follows: 1 Shift Indicator 1 Power Steering 1 Battery Control Module 1 DCDC Converter 2 2 Charging System 2 5 Traction Battery Vehicle No. 2 Vehicle No. 1 Number...

360

Optimal decentralized control of coupled subsystems with control sharing  

E-Print Network (OSTI)

The optimal decentralized control of coupled subsystems with control sharing is investigated. The system consists of $n$-coupled subsystems, each with a local control station. The evolution of a subsystem is controlled by the actions of all control stations. However, each control station observes only the state of its subsystem and the one-step delayed actions of all control stations. At each time, a cost that depends on the state of all subsystems and the actions of all control stations is incurred. The system has non-classical information structure; since each control station observes the delayed control actions of all other control stations, the system is said to have \\emph{control-sharing} information structure. We first identify redundant data at each controller, then use the common-information based approach of Nayyar et al. (2011) to obtain the structure of optimal control strategies and a dynamic programming decomposition, and finally use the specifics of the model to simplify the structure of optimal...

Mahajan, Aditya

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Variable flow control for a nuclear reactor control rod  

DOE Patents (OSTI)

A variable flow control for a control rod assembly of a nuclear reactor that depends on turbulent friction though an annulus. The annulus is formed by a piston attached to the control rod drive shaft and a housing or sleeve fitted to the enclosure housing the control rod. As the nuclear fuel is burned up and the need exists for increased reactivity, the control rods are withdrawn, which increases the length of the annulus and decreases the rate of coolant flow through the control rod assembly.

Carleton, Richard D. (Pittsburgh, PA); Bhattacharyya, Ajay (Vasteras, SE)

1978-01-01T23:59:59.000Z

362

Optimal control for biological movement systems  

E-Print Network (OSTI)

of hierarchical control system (results obtained afterthe greatest discovery in control and systems theory of theloop Control System. . . . . . . . . . . . . . . . . . . 10

Li, Weiwei

2006-01-01T23:59:59.000Z

363

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

on control systems . . . . . . . . . . . . . . . . 7.2control system. . . . . . . . . . . . . . . . . . . . . . . . . .8 Stabilization of Networked Control Systems using 8.1

Amin, Saurabh

2011-01-01T23:59:59.000Z

364

Isotopically controlled semiconductors  

SciTech Connect

The following article is an edited transcript based on the Turnbull Lecture given by Eugene E. Haller at the 2005 Materials Research Society Fall Meeting in Boston on November 29, 2005. The David Turnbull Lectureship is awarded to recognize the career of a scientist who has made outstanding contributions to understanding materials phenomena and properties through research, writing, and lecturing, as exemplified by the life work of David Turnbull. Haller was named the 2005 David Turnbull Lecturer for his 'pioneering achievements and leadership in establishing the field of isotopically engineered semiconductors; for outstanding contributions to materials growth, doping and diffusion; and for excellence in lecturing, writing, and fostering international collaborations'. The scientific interest, increased availability, and technological promise of highly enriched isotopes have led to a sharp rise in the number of experimental and theoretical studies with isotopically controlled semiconductor crystals. This article reviews results obtained with isotopically controlled semiconductor bulk and thin-film heterostructures. Isotopic composition affects several properties such as phonon energies, band structure, and lattice constant in subtle, but, for their physical understanding, significant ways. Large isotope-related effects are observed for thermal conductivity in local vibrational modes of impurities and after neutron transmutation doping. Spectacularly sharp photoluminescence lines have been observed in ultrapure, isotopically enriched silicon crystals. Isotope multilayer structures are especially well suited for simultaneous self- and dopant-diffusion studies. The absence of any chemical, mechanical, or electrical driving forces makes possible the study of an ideal random-walk problem. Isotopically controlled semiconductors may find applications in quantum computing, nanoscience, and spintronics.

Haller, Eugene E.

2006-06-19T23:59:59.000Z

365

Controlled thermonuclear fusion reactors  

SciTech Connect

Controlled production of energy by fusion of light nuclei has been the goal of a large portion of the physics community since the 1950's. In order for a fusion reaction to take place, the fuel must be heated to a temperature of 100 million degrees Celsius. At this temperature, matter can exist only in the form of an almost fully ionized plasma. In order for the reaction to produce net power, the product of the density and energy confinement time must exceed a minimum value of 10/sup 20/ sec m/sup -3/, the so-called Lawson criterion. Basically, two approaches are being taken to meet this criterion: inertial confinement and magnetic confinement. Inertial confinement is the basis of the laser fusion approach; a fuel pellet is imploded by intense laser beams from all sides and ignites. Magnetic confinement devices, which exist in a variety of geometries, rely upon electromagnetic forces on the charged particles of the plasma to keep the hot plasma from expanding. Of these devices, the most encouraging results have been achieved with a class of devices known as tokamaks. Recent successes with these devices have given plasma physicists confidence that scientific feasibility will be demonstrated in the next generation of tokamaks; however, an even larger effort will be required to make fusion power commercially feasible. As a result, emphasis in the controlled thermonuclear research program is beginning to shift from plasma physics to a new branch of nuclear engineering which can be called fusion engineering, in which instrumentation and control engineers will play a major role. Among the new problem areas they will deal with are plasma diagnostics and superconducting coil instrumentation.

Walstrom, P.L.

1976-01-01T23:59:59.000Z

366

Controlling DNA Methylation  

NLE Websites -- All DOE Office Websites (Extended Search)

Controlling DNA Methylation Though life on earth is composed of a diverse range of organisms, some with many different types of tissues and cells, all these are encoded by a molecule we call DNA. The information required to build a protein is stored in DNA within the cells. Not all the message in the DNA is used in each cell and not all the message is used all the time. During cell differentiation, the cells become dedicated for their specific function which involves selectively activating some genes and repressing others. Gene regulation is an important event in the developmental biology and the biology of various diseases, but a more complex process. Controlling DNA Methylation Though life on earth is composed of a diverse range of organisms, some with many different types of tissues and cells, all these are encoded by a molecule we call DNA. The information required to build a protein is stored in DNA within the cells. Not all the message in the DNA is used in each cell and not all the message is used all the time. During cell differentiation, the cells become dedicated for their specific function which involves selectively activating some genes and repressing others. Gene regulation is an important event in the developmental biology and the biology of various diseases, but a more complex process. In the bacteria there are distinct enzymes while one is capable of cleaving DNA, the other protects DNA by modification. The complementary function provided by the set of enzymes offers a defense mechanism against the phage infection and DNA invasion. The incoming DNA is cleaved sequence specifically by the class of enzymes called restriction endonuclease (REase). The host DNA is protected by the sequence specific action of matching set of enzymes called the DNA methyltransferase (MTase). The control of the relative activities of the REase and MTase is critical because a reduced ratio of MTase/REase activity would lead to cell death via autorestriction. However too high a ratio would fail to provide protection against invading viral DNA. In addition a separate group of proteins capable of controlling R-M proteins have been identified in various restriction-modification (R-M) systems which are called C proteins (Roberts et al., 2003).

367

Management Control Cover  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assess- Assess- ing Natural Resource Damage at Rocky Flats OAS-M-06-02 November 2005 REPORT ON MANAGEMENT CONTROLS OVER ASSESSING NATURAL RESUORCE DAMAGE AT ROCKY FLATS TABLE OF CONTENTS Natural Resource Damage Assessment at Rocky Flats Details of Finding 1 Recommendation and Comments 3 Appendices Objective, Scope, and Methodology 5 Prior Audit Reports 6 Management Comments 7 NATURAL RESURCE DAMAGE ASSESSMENT AT ROCKY FLATS Page 1 Details of Finding Natural Resource The Rocky Flats Project Office (Project Office) had not initiated, Damage Assessment and had no plans, at the time of our review, for conducting a Natural Resource Damage Assessment (NRDA) at the Rocky Flats

368

Thermionic Converter Temperature Controller  

DOE Patents (OSTI)

A method and apparatus for controlling the temperature of a thermionic reactor over a wide range of operating power, including a thermionic reactor having a plurality of integral cesium reservoirs, a honeycomb material disposed about the reactor which has a plurality of separated cavities, a solid sheath disposed about the honeycomb material and having an opening therein communicating with the honeycomb material and cavities thereof, and a shell disposed about the sheath for creating a coolant annulus therewith so that the coolant in the annulus may fill the cavities and permit nucleate boiling during the operation of the reactor.

Shaner,B. J.; Wolf, Joseph H.; Johnson, Robert G. R.

1999-08-23T23:59:59.000Z

369

REMOTE CONTROLLED SWITCHING DEVICE  

DOE Patents (OSTI)

An electrical switching device which can be remotely controlled and in which one or more switches may be accurately operated at predetermined times or with predetermined intervening time intervals is described. The switching device consists essentially of a deck, a post projecting from the deck at right angles thereto, cam means mounted for rotation around said posts and a switch connected to said deck and actuated by said cam means. Means is provided for rotating the cam means at a constant speed and the switching apparatus is enclosed in a sealed container with external adjusting means and electrical connection elements.

Hobbs, J.C.

1959-02-01T23:59:59.000Z

370

Thermionic converter temperature controller  

DOE Patents (OSTI)

A method and apparatus for controlling the temperature of a thermionic reactor over a wide range of operating power, including a thermionic reactor having a plurality of integral cesium reservoirs, a honeycomb material disposed about the reactor which has a plurality of separated cavities, a solid sheath disposed about the honeycomb material and having an opening therein communicating with the honeycomb material and cavities thereof, and a shell disposed about the sheath for creating a coolant annulus therewith so that the coolant in the annulus may fill the cavities and permit nucleate boiling during the operation of the reactor.

Shaner, Benjamin J. (McMurray, PA); Wolf, Joseph H. (Pittsburgh, PA); Johnson, Robert G. R. (Trafford, PA)

2001-04-24T23:59:59.000Z

371

Mercury Controls Update 2011  

Science Conference Proceedings (OSTI)

In light of the proposed Maximum Achievable Control Technology (MACT) ruling for hazardous air pollutants (HAPs) issued by the U.S. Environmental Protection Agency on March 16, 2011, the requirement to reduce emissions of mercury and other HAPs is one of the key challenges for coal-fired power plants. The proposed MACT ruling limits mercury emissions to 1.2 lb/TBtu at the stack (4.0 lb/TBtu for lignite-fired units), based on a 30-day rolling average including startup and shutdown periods. To help electri...

2011-12-21T23:59:59.000Z

372

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Change Notice No. 1 2009 Change Notice No. 2 2011 DOE HANDBOOK RADIOLOGICAL CONTROL TECHNICIAN TRAINING U.S. Department of Energy AREA TRNG Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Not Measurement Sensitive DOE-HDBK-1122-2009 This document is available on the Department of Energy Technical Standards Program Web Site at http://www.hss.energy.gov/nuclearsafety/techstds/ Change 1 DOE-HDBK-1122-2009 Original Change Part 3 1.05-1 NCRP Report No. 93 "Ionizing Radiation Exposure of the Population of the United States". NCRP Report No. 160 "Ionizing Radiation Exposure of the Population

373

REACTOR CONTROL MECHANISM  

DOE Patents (OSTI)

A quick-releasing mechanism is described which may be used to rapidiy drop a device supported from beneath during normal use, such as a safety rod in a nuclear reactor. In accordance with this invention an electrical control signal, such as may be provided by radiation detection or other alarm condition sensing devices, is delivered to an electromagnetic solenoid, the armature of which is coupled to an actuating mechanism. The solenoid is energized when the mechanism is in its upper or cocked position. In such position, the mechanism engages a plurality of retaining balls, forcing them outward into engagement with a shoulder or recess in a corresponding section of a tubular extension on the upheld device. When the control signal to the solenoid suddenly ceases, the armature drops out, allowing the actuating mechanism to move slightly but rapidly under the force of a compressed spring. The weight of the device will urge the balls inward against a beveled portion of the actuating mechanism and away from the engaging section on the tubular extension, thus allowing the upheld device to fall freely under the influence of gravity.

Lane, J.A.; Engberg, R.E.; Welch, J.M.

1959-05-12T23:59:59.000Z

374

Laser fusion pulse shape controller  

DOE Patents (OSTI)

An apparatus for controlling the pulse shape, i.e., the pulse duration and intensity pattern, of a pulsed laser system, and which is particularly well adapted for controlling the pellet ignition pulse in a laser-driven fusion reaction system. The apparatus comprises a laser generator for providing an optical control pulse of the shape desired, a pulsed laser triggered by the control pulse, and a plurality of optical Kerr-effect gates serially disposed at the output of the pulsed laser and selectively triggered by the control pulse to pass only a portion of the pulsed laser output generally corresponding in shape to the control pulse.

Siebert, Larry D. (Ann Arbor, MI)

1977-01-01T23:59:59.000Z

375

Lighting Group: Controls and Communications  

NLE Websites -- All DOE Office Websites (Extended Search)

Communications Communications Controls and Communications The Controls and Communications research activity investigates how digital technologies, such as Bluetooth, can be applied to building lighting control systems to increase building efficiency and improve occupant comfort and productivity. Projects range from embedded device networks applied to building lighting systems, to WiFi and environmental sensing and monitoring. light switch Current Projects IBECS (Integrated Building Environmental Communications System) Wireless Lighting Controls (with DUST Networks) HPCBS Advanced Digital Controls Building Control Systems Integration Completed Projects CEC Public Interest Energy Research (PIER) Projects 450 Golden Gate Project New Publications Standardizing Communication Between Lighting Devices: A Role for

376

Johnson Controls ESCO Qualification Sheet  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Johnson Controls ESCO Qualification Sheet DOE Super ESPC Introduction to Johnson Controls Johnson Controls has been a worldwide leader in building controls and efficiency for over 120 years (since 1885). Johnson Controls has developed, designed, installed, financed, measured, verified, operated, maintained, and guaranteed the savings for more than 2,500 projects for our diverse customer base worldwide. Under current Federal ESPC contracts, we have Johnson Controls manages developed and implemented more than 75 projects for various a performance contracting agencies, including the Army, DOE, Air Force, Navy, General Services portfolio in the U.S. of over Administration, Department of Veterans Affairs, Justice Department, $4.3 billion

377

Application of programmable logic controllers to substation control and protection  

Science Conference Proceedings (OSTI)

This paper describes the application of programmable logic controllers (PLCs) to control and protection of bulk power and regional supply substations. PLC requirements are discussed and the concept of zones of control is explained as applied to standard PP L substation arrangements. The use of a peer-to-peer communication network between logic controllers and other substation equipment is also discussed. Details of an installation completed in spring, 1992, are presented, including experience acquired from power system faults.

Gilbert, J.G.; Diehl, G.R. (Pennsylvania Power Light Co., Allentown, PA (United States))

1994-01-01T23:59:59.000Z

378

Goodyear Tire Plant Gains Traction on Energy Savings After Completing Save Energy Now Assessment (Revised)  

Science Conference Proceedings (OSTI)

This DOE Save Energy Now case study describes how the Goodyear Tire Plant saves approx. 93,000 MMBtu and $875,000 annually after increasing steam system energy efficiency in the Union City, TN, plant.

Not Available

2008-04-01T23:59:59.000Z

379

Storage device sizing for a hybrid railway traction system by means of bicausal bond graphs  

E-Print Network (OSTI)

(a supercapacitor) included in this system is then discussed. Keywords: bond graph, bicausality In the paper, the example of a supercapacitor process consists of choosing the system structure dimensioning

Paris-Sud XI, Université de

380

Multi-Stage Converters: A New Technology for Traction Drive Juan W. Dixon  

E-Print Network (OSTI)

of this drive is that the switching frequency of the Main converter is at the fundamental frequency, reducing will be the Slaves. The Main Converter works at the lower switching frequency (fundamental frequency), which, and A. Tahri, "Multilevel Converters and VAR Compensation", Chapter 25, Power Electronics Handbook

Rudnick, Hugh

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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381

Prospects for Non-Rare Earth Permanent Magnets for Traction Motors and Generators  

Science Conference Proceedings (OSTI)

With the advent of high-flux density permanent magnets based on rare earth elements such as neodymium (Nd) in the 1980s, permanent magnet-based electric machines had a clear performance and cost advantage over induction machines when weight and size were factors such as in hybrid electric vehicles and wind turbines. However, the advantages of the permanent magnet-based electric machines may be overshadowed by supply constraints and high prices of their key constituents, rare earth elements, which have seen nearly a 10-fold increase in price in the last 5 years and the imposition of export limits by the major producing country, China, since 2010. We outline the challenges, prospects, and pitfalls for several potential alloys that could replace Nd-based permanent magnets with more abundant and less strategically important elements.

Kramer, Matthew; McCallum, Kendall; Anderson, Iver; Constantinides, Steven

2012-06-29T23:59:59.000Z

382

EV3 : Traction drives and generators A: Electric machine design and optimization 1  

E-Print Network (OSTI)

of Rotor Structure and Number of Phases on First and Second Order Characteristics of TOYOTA PRIUS torque, torque-speed characteristics. I. STUDIED PRIUS MACHINE A. The average torque Taverage (first of PRIUS machine. A methodology consists of coupling between an optimization program of Matlab and the FEM

Paris-Sud XI, Université de

383

A Power Presizing Methodology for Electric Vehicle Traction Motors Bekheira Tabbache1,2  

E-Print Network (OSTI)

= Vehicle base speed; Vcr = Vehicle cruising speed; = Grade angle; Pv = Vehicle driving power; Fw = Road for the most appropriate electric propulsion system. In this case, key features are efficiency, reliability manuscript, published in "International Review on Modelling and Simulations 6, 1 (2013) 29-32" #12;motor type

Brest, Université de

384

High-Temperature High-Power Packaging Techniques for HEV Traction Applications  

DOE Green Energy (OSTI)

A key issue associated with the wider adoption of hybrid-electric vehicles (HEV) and plug in hybrid-electric vehicles (PHEV) is the implementation of the power electronic systems that are required in these products. One of the primary industry goals is the reduction in the price of these vehicles relative to the cost of traditional gasoline powered vehicles. Today these systems, such as the Prius, utilize one coolant loop for the engine at approximately 100 C coolant temperatures, and a second coolant loop for the inverter at 65 C. One way in which significant cost reduction of these systems could be achieved is through the use of a single coolant loop for both the power electronics as well as the internal combustion engine (ICE). This change in coolant temperature significantly increases the junction temperatures of the devices and creates a number of challenges for both device fabrication and the assembly of these devices into inverters and converters for HEV and PHEV applications. Traditional power modules and the state-of-the-art inverters in the current HEV products, are based on chip and wire assembly and direct bond copper (DBC) on ceramic substrates. While a shift to silicon carbide (SiC) devices from silicon (Si) devices would allow the higher operating temperatures required for a single coolant loop, it also creates a number of challenges for the assembly of these devices into power inverters. While this traditional packaging technology can be extended to higher temperatures, the key issues are the substrate material and conductor stability, die bonding material, wire bonds, and bond metallurgy reliability as well as encapsulation materials that are stable at high operating temperatures. The larger temperature differential during power cycling, which would be created by higher coolant temperatures, places tremendous stress on traditional aluminum wire bonds that are used to interconnect power devices. Selection of the bond metallurgy and wire bond geometry can play a key role in mitigating this stress. An alternative solution would be to eliminate the wire bonds completely through a fundamentally different method of forming a reliable top side interconnect. Similarly, the solders used in most power modules exhibit too low of a liquidus to be viable solutions for maximum junction temperatures of 200 C. Commonly used encapsulation materials, such as silicone gels, also suffer from an inability to operate at 200 C for extended periods of time. Possible solutions to these problems exist in most cases but require changes to the traditional manufacturing process used in these modules. In addition, a number of emerging technologies such as Si nitride, flip-chip assembly methods, and the elimination of base-plates would allow reliable module development for operation of HEV and PHEV inverters at elevated junction temperatures.

Elshabini, Aicha [University of Idaho; Barlow, Fred D. [University of Idaho

2006-11-01T23:59:59.000Z

385

Exact null controllability of degenerate evolution equations with scalar control  

SciTech Connect

Necessary and sufficient conditions for the exact null controllability of a degenerate linear evolution equation with scalar control are obtained. These general results are used to examine the exact null controllability of the Dzektser equation in the theory of seepage. Bibliography: 13 titles.

Fedorov, Vladimir E; Shklyar, Benzion

2012-12-31T23:59:59.000Z

386

The quantum systems control and the optimal control theory  

E-Print Network (OSTI)

Mathematical theory of the quantum systems control is based on some ideas of the optimal control theory. These ideas are developed here as applied to these systems. The results obtained meet the deficiencies in the basis and algorithms of the control synthesis and expand the application of these methods.

V. F. Krotov

2008-04-21T23:59:59.000Z

387

Computer Control of Boiler Operation  

E-Print Network (OSTI)

Rapidly rising energy costs present the opportunity for substantial cost savings through improved boiler combustion control. A process computer control system was installed at an Air Products & Chemicals facility in 1978. As a result the boiler efficiency has increased over 11%. The control system includes; air flow, fuel flow, pressure and drum level control. Air flow control is achieved through modulation of the F.D. fan inlet vanes. Demand for airflow is produced from a high signal selection of the steam pressure controller or the total fuel signal. The output of the oxygen controller is used to modify this airflow index by the desired air/fuel ratio. The air/fuel ratio is a polynomial function of the type of fuel used. In summary, the computer control system provides for; greater overall boiler stability, operation within tight air/gas limits, increased boiler efficiency, capability to burn multiple fuels, faster response to demand changes, and fewer shutdowns.

Pareja, G. E.

1981-01-01T23:59:59.000Z

388

OMB Control No.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

300.3 300.3 (09-93) (All other editions are obsolete) OMB Control No. 1910-0500 OMB Burden Disclosure Statement on Page 4 U.S. Department of Energy Semi-Annual Summary Report of DOE-Owned Plant and Capital Equipment (P&CE) Contractor Name Address Location of Property (City, State) Contracting Office Contract No. Asset Type Code Beginning Balance As of No. of Items $ Acquisitions No. of Items $ Dispositions No. of Items $ Ending Balance As of No. of Items $ Total Plant and Capital Equipment 1 2 3 4 5 6 7 8 9 Prepared By name (printed), title, telephone number, signature Date of Last Physical Inventory of Capital Equipment Contracting Officer Representative Signature

389

OMB Control No.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3A 3A (03-94) OMB Control No. 1910-0400 Public reporting burden for this collection of information is estimated to average 10 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Office of Information Resources Management Policy, Plans, and Oversight, Records Management Division, HR-422 - GTN, Paperwork Reduction Project (1910-0400), U.S. Department of Energy, 1000 Independence Avenue, S.W., Washington, DC 20585; and to the Office of Management and Budget (OMB), Paperwork

390

Management Control Cover  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BWXT's Teaming Partner BWXT's Teaming Partner Arrangement at Pantex OAS-M-06-04 February 2006 2 approval and BWXT reimbursed the parent company of Bechtel, Bechtel National, for indirect costs in excess of contract limits. This occurred because the Pantex Site Office did not: 1) ensure that BWXT complied with contractual provisions that limited post-retirement health benefits to BWXT employees, and 2) implement adequate controls to mitigate potential conflict of interest situations involving purchases from Bechtel National and affiliates. As a result, the Department was at risk of paying $3 million in post-retirement health benefits for individuals who were ineligible for the benefits. Additionally, the Department has reimbursed BWXT approximately $90,000 for questionable costs associated with indirect charges made by Bechtel National.

391

Management Control Cover  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the the Hanford Site Transuranic Mixed Tank Waste OAS-M-06-01 November 2005 REPORT ON MANAGEMENT CONTROLS OVER THE HANFORD SITE TRANSURANIC MIXED TANK WASTE TABLE OF CONTENTS Hanford Site Transuranic Mixed Tank Waste Details of Finding 1 Recommendations and Comments 3 Appendices Objective, Scope, and Methodology 6 Prior Audit Reports 8 Hanford Site Transuranaic Mixed Tank Waste Page 1 Details of Finding Regulation and The Office of River Protection (ORP) pursued the Transuranic Permits Mixed Tank (TRUM) Waste Project without sufficiently addressing regulatory and permitting issues. In 2003, ORP initiated efforts through its contractor, CH2M Hill Hanford Group, Inc. (CHG) to proceed with the TRUM waste project. According

392

OMB Control No.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7 7 (02-94) OMB Control No. 1910-0600 U.S. Department of Energy APPLICANT DISABILITY, RACE/NATIONAL ORIGIN AND SEX IDENTIFICATION (Please read the Instructions and Privacy Act Statement before completing this form) Vacancy Announcement Number Name (Last, First, Middle Initial) Position Title, Series, Grade Social Security Number Sex Male Female OMB Burden Disclosure Statement Public reporting burden for this collection of information is estimated to average 10 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including

393

Management Control Cover  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Performance Fees in the Idaho Performance Fees in the Idaho National Laboratory Contract OAS-M-06-07 August 2006 REPORT ON MANAGEMENT CONTROLS OVER PERFORMANCE FEES IN THE IDAHO NATIONAL LABORATORY CONTRACT TABLE OF CONTENTS Performance Fees Details of Finding 1 Recommendations and Comments 4 Appendices 1. Objective, Scope, and Methodology 6 2. Other Matters 7 3. Related Audit Reports 8 4. Management Comments 9 PERFORMANCE FEES IN THE IDAHO NATIONAL LABORATORY CONTRACT Page 1 Details of Finding Performance Measures The Department of Energy (Department) did not always effectively and Fees use performance measures and fees to appropriately reward contractor performance. Specifically, the Department allocated approximately $1.1 million for 3 of the 27 performance measures

394

REMOTE CONTROL MANIPULATOR  

DOE Patents (OSTI)

The patent covers a remote-control manipulator in which a tool is carried on a tube at an end thereof angularly related to the main portion of the tube and joined thereto by a curved section. The main portion of the tube is mounted for rotation and axial shifting in a wall separating safe and dangerous areas. The tool is actuated to grasp and release an object in the dangerous area by means of a compound shaft extending through the tube, the shaft having a flexible section extending through the curved section of the tube. The tool is moved about in the dangerous area by rotation and axial movement of the main portion of the tube. Additional movement of the tool is obtained through axial shifting of the shaft with respect to the tube through which it extends. (AEC)

Coffman, R.T.

1962-11-27T23:59:59.000Z

395

Controlled-Potential Electrolysis  

Science Conference Proceedings (OSTI)

Table 2   Metals determined by controlled-potential coulometry...27 Silver Pt Ag + ?? Ag(s) 0.1 M H 2 SO 4 14 , 28 Technetium Hg Tc 7+ ?? Tc 3+ Acetate-tripolyphosphate 29 Thallium Pt Tl + ?? Tl 3+ 1 M HCl 30 Tin Hg Sn 4+ Sn(Hg) 3 M KBr, 0.2 M HBr 31 Titanium Hg Ti 4+ ?? Ti 3+ 6??9 M H 2 SO 4 32 Uranium Hg U 6+ ?? U 4+ 0.5 M H 2 SO 4 33 Vanadium Pt V 5+ ?? V 4+ V 4+ ?? V 5+ 1.5...

396

Electronically controlled cable wrapper  

DOE Patents (OSTI)

A spindle assembly engages and moves along a length of cable to be wrapped with insulating tape. Reels of insulating tape are mounted on a outer rotatable spindle which revolves around the cable to dispense insulating tape. The rate of movement of the spindle assembly along the length of the cable is controlled by a stepper motor which is programmably synchronized to the rate at which rotatable spindle wraps the cable. The stepper motor drives a roller which engages the cable and moves the spindle assembly along the length of the cable as it is being wrapped. The spindle assembly is mounted at the end of an articulated arm which allows free movement of the spindle assembly and allows the spindle assembly to follow lateral movement of the cable.

Young, T.M.

1982-08-17T23:59:59.000Z

397

Radiological Control Technician Training  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

_______ _______ Change Notice 1 June 2009 DOE HANDBOOK RADIOLOGICAL CONTROL TECHNICIAN TRAINING U.S. Department of Energy AREA TRNG Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Not Measurement Sensitive DOE-HDBK-1122-2009 This document is available on the Department of Energy Technical Standards Program Web Site at http://www.hss.energy.gov/nuclearsafety/techstds/ Change 1 DOE-HDBK-1122-2009 Original Change Part 3 1.05-1 NCRP Report No. 93 "Ionizing Radiation Exposure of the Population of the United States". NCRP Report No. 160 "Ionizing Radiation Exposure of the Population of the United States". Part 3 1.05-9 4) U.S. national average from diagnostic

398

Intuitionistic Control Logic  

E-Print Network (OSTI)

We introduce a propositional logic ICL, which adds to intuitionistic logic elements of classical reasoning without collapsing it into classical logic. This logic includes a new constant for false, which augments false in intuitionistic logic and in minimal logic. The new constant requires a simple-yet-significant modification of intuitionistic logic both semantically and proof-theoretically. We define a Kripke-style semantics as well as a topological space interpretation in which the new constant is given a precise denotation. We define a sequent calculus and prove cut-elimination. We then formulate a natural deduction proof system with a term calculus, one that gives a direct, computational interpretation of contraction. This calculus shows that ICL is fully capable of typing programming language control constructs such as call/cc while maintaining intuitionistic implication as a genuine connective.

Chuck Liang; Dale Miller

2012-01-01T23:59:59.000Z

399

Cell Operations and Process Control  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Aluminum Reduction Technology: Cell Operations and Process Control Sponsored by: TMS Light Metals Division, TMS: Aluminum Committee

400

ARCS Access Rate Control System  

protected steel housing. ... Access Rate Control System This rugged, maintenance- ... Y-12 is seeking an industry partner to fully com-

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Exercise Control System Press Release  

Science Conference Proceedings (OSTI)

MEL Transfers its Web-Based Emergency Response Exercise Control System. During FY05-FY07 the MEL staff worked ...

2010-10-05T23:59:59.000Z

402

Air Pollution Control Regulations: No.27 - Control of Nitrogen Oxide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Air Pollution Control Regulations: No.27 - Control of Nitrogen Air Pollution Control Regulations: No.27 - Control of Nitrogen Oxide Emissions (Rhode Island) Air Pollution Control Regulations: No.27 - Control of Nitrogen Oxide Emissions (Rhode Island) < Back Eligibility Commercial Industrial Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Program Info State Rhode Island Program Type Environmental Regulations Provider Department of Environmental Management These regulations apply to stationary sources with the potential to emit 50 tons of nitrogen oxides (NOx) per year from all pollutant-emitting equipment or activities. The regulations describe possibilities for exemptions (i.e., for sources which have the potential to emit 50 tons but do not actually reach that level) and Reasonably Available Control

403

The UCONABC usage control model  

Science Conference Proceedings (OSTI)

In this paper, we introduce the family of UCONABC models for usage control (UCON), which integrate Authorizations (A), oBligations (B), and Conditions (C). We call these core models because they address the essence of UCON, leaving ... Keywords: access control, digital rights management, privacy, trust, usage control

Jaehong Park; Ravi Sandhu

2004-02-01T23:59:59.000Z

404

Optimal Control of Distillation Systems  

E-Print Network (OSTI)

The optimum performance of a distillation system can be evaluated by examining the product purities, the product recoveries, and the system's capability to respond to small or large, expected or unexpected, plant disturbances. An optimal control system should include accurate instrumentation, closed loop purity control, and a computer system to execute direct digital control with appropriate feed-forward algorithms.

Chatterjee, N.; Suchdeo, S. R.

1984-01-01T23:59:59.000Z

405

REACTOR CONTROL ROD OPERATING SYSTEM  

DOE Patents (OSTI)

A nuclear reactor control rod mechanism is designed which mechanically moves the control rods into and out of the core under normal conditions but rapidly forces the control rods into the core by catapultic action in the event of an emergency. (AEC)

Miller, G.

1961-12-12T23:59:59.000Z

406

CRADA Final Report: Application of Dual-Mode Invertor Control to Commercially Available Radial-Gap Permanent Magnet Motors - Vol. 1  

SciTech Connect

John Deere and Company (Deere), their partner, UQM Technologies, Inc. (UQM), and the Oak Ridge National Laboratory's (ORNL's) Power Electronics and Electric Machinery Research Center (PEEMRC) recently completed work on the cooperative research and development agreement (CRADA) Number ORNL 04-0691 outlined in this report. CRADA 04-0691 addresses two topical issues of interest to Deere: (1) Improved characterization of hydrogen storage and heat-transfer management; and (2) Potential benefits from advanced electric motor traction-drive technologies. This report presents the findings of the collaborative examination of potential operational and cost benefits from using ORNL/PEEMRC dual-mode inverter control (DMIC) to drive permanent magnet (PM) motors in applications of interest to Deere. DMIC was initially developed and patented by ORNL to enable PM motors to be driven to speeds far above base speed where the back-electromotive force (emf) equals the source voltage where it is increasingly difficult to inject current into the motor. DMIC is a modification of conventional phase advance (CPA). DMIC's dual-speed modes are below base speed, where traditional pulse-width modulation (PWM) achieves maximum torque per ampere (amp), and above base speed, where six-step operation achieves maximum power per amp. The modification that enables DMIC adds two anti-parallel thyristors in each of the three motor phases, which consequently adds the cost of six thyristors. Two features evaluated in this collaboration with potential to justify the additional thyristor cost were a possible reduction in motor cost and savings during operation because of higher efficiency, both permitted because of lower current. The collaborative analysis showed that the reduction of motor cost and base cost of the inverter was small, while the cost of adding six thyristors was greater than anticipated. Modeling the DMIC control displayed inverter efficiency gains due to reduced current, especially under light load and higher speed. This current reduction, which is the salient feature of DMIC, may be significant when operating duty cycles have low loads at high frequencies. Reduced copper losses make operation more efficient thereby reducing operating costs. In the Deere applications selected for this study, the operating benefit was overshadowed by the motor's rotational losses. Rotational losses of Deere 1 and Deere 2 dominate the overall drive efficiency so that their reduction has the greatest potential to improve performance. A good follow-up project would be to explore cost erective ways to reduce the rotational losses buy 66%.

Lawler, J.S. (U. Tennessee-Knoxville); McKeever, J.W.; Downing, M.E.; Stahlhut, R.D (John Deere); Bremmer, R. (John Deere); Shoemaker, J.M. (John Deere); Seksarian, A.K. (john Deere); Poore, B. (John Deere); Lutz, J. (UQM)

2006-05-01T23:59:59.000Z

407

CRADA Final Report: Application of Dual-Mode Invertor Control to Commercially Available Radial-Gap Permanent Magnet Motors - Vol. 1  

DOE Green Energy (OSTI)

John Deere and Company (Deere), their partner, UQM Technologies, Inc. (UQM), and the Oak Ridge National Laboratory's (ORNL's) Power Electronics and Electric Machinery Research Center (PEEMRC) recently completed work on the cooperative research and development agreement (CRADA) Number ORNL 04-0691 outlined in this report. CRADA 04-0691 addresses two topical issues of interest to Deere: (1) Improved characterization of hydrogen storage and heat-transfer management; and (2) Potential benefits from advanced electric motor traction-drive technologies. This report presents the findings of the collaborative examination of potential operational and cost benefits from using ORNL/PEEMRC dual-mode inverter control (DMIC) to drive permanent magnet (PM) motors in applications of interest to Deere. DMIC was initially developed and patented by ORNL to enable PM motors to be driven to speeds far above base speed where the back-electromotive force (emf) equals the source voltage where it is increasingly difficult to inject current into the motor. DMIC is a modification of conventional phase advance (CPA). DMIC's dual-speed modes are below base speed, where traditional pulse-width modulation (PWM) achieves maximum torque per ampere (amp), and above base speed, where six-step operation achieves maximum power per amp. The modification that enables DMIC adds two anti-parallel thyristors in each of the three motor phases, which consequently adds the cost of six thyristors. Two features evaluated in this collaboration with potential to justify the additional thyristor cost were a possible reduction in motor cost and savings during operation because of higher efficiency, both permitted because of lower current. The collaborative analysis showed that the reduction of motor cost and base cost of the inverter was small, while the cost of adding six thyristors was greater than anticipated. Modeling the DMIC control displayed inverter efficiency gains due to reduced current, especially under light load and higher speed. This current reduction, which is the salient feature of DMIC, may be significant when operating duty cycles have low loads at high frequencies. Reduced copper losses make operation more efficient thereby reducing operating costs. In the Deere applications selected for this study, the operating benefit was overshadowed by the motor's rotational losses. Rotational losses of Deere 1 and Deere 2 dominate the overall drive efficiency so that their reduction has the greatest potential to improve performance. A good follow-up project would be to explore cost erective ways to reduce the rotational losses buy 66%.

Lawler, J.S. (U. Tennessee-Knoxville); McKeever, J.W.; Downing, M.E.; Stahlhut, R.D (John Deere); Bremmer, R. (John Deere); Shoemaker, J.M. (John Deere); Seksarian, A.K. (john Deere); Poore, B. (John Deere); Lutz, J. (UQM)

2006-05-01T23:59:59.000Z

408

Adaptive vibration control using synchronous demodulation with ...  

Adaptive vibration control using synchronous demodulation with machine tool controller motor commutation United States Patent

409

Plasma Control Requirements and Concepts For ITER  

Science Conference Proceedings (OSTI)

Technical Paper / Special Section: Plasma Control Issues for Tokamaks / Instrumentation Control and Data Handling

J. Wesley,* H.-W. Bartels; D. Boucher; A. Costley; L. De Kock; Yu. Gribov; M. Huguet; G. Janeschitz; P.-L. Mondino; V. Mukhovatov; A. Portone; M. Sugihara; I. Yonekawa

410

Inverter Controlled Screw Air Compressor Manufacturers ...  

U.S. Energy Information Administration (EIA)

Inverter Controlled Screw Air Compressor, Inverter Controlled Screw Air Compressor Manufacturers & Suppliers Directory - Find here Inverter ...

411

SAFETY SYSTEM FOR CONTROL ROD  

DOE Patents (OSTI)

A structure for monitoring the structural continuity of a control rod foi a neutron reactor is presented. A electric conductor readily breakable under mechanical stress is fastened along the length of the control rod at a plurality of positions and forms a closed circuit with remote electrical components responsive to an open circuit. A portion of the conductor between the control rod and said components is helically wound to allow free and normally unrestricted movement of the segment of conductor secured to the control rod relative to the remote components. Any break in the circuit is indicative of control rod breakage. (AEC)

Paget, J.A.

1963-05-14T23:59:59.000Z

412

NSLS control system upgrade status  

SciTech Connect

The NSLS control system initially installed in 1978 has undergone several modifications but the basic system architecture remained relatively unchanged. The need for faster response, increased reliability and better diagnostics made the control system upgrade a priority. Since the NSLS runs continuously, major changes to the control system are difficult. The upgrade plan had to allow continuous incremental changes to the control system without having any detrimental effect on operations. The plan had to provide for immediate improvement in a few key areas, such as data access rates, and be complete in a short time. At present, most accelerator operations utilize the upgraded control system.

Smith, J.; Ramamoorthy, S.; Tang, Y.; Flannigan, J.; Sathe, S.; Keane, J.; Krinsky, S.

1993-07-01T23:59:59.000Z

413

New controllers aid substation automation  

SciTech Connect

Descriptions of and experience with Siemens voltage regulators, voltage regulator control panels, and digital meters used by two electric cooperatives are described. Magic Valley Electric Cooperative in Texas retrofitted substations to improve substation regulation control. 54 Siemens MJ-XTM voltage regulator control panels were installed, replacing load tap changer control units and single-stage voltage regulator control units. The Smoky Hill Electric Cooperative in Kansas installed Siemens 4700 digital meters and upgraded substation voltage regulators with Siemens JFR single-phase, step voltage regulators to address nightly overvoltage and summer peak demand problems.

Beaty, W.

1996-09-01T23:59:59.000Z

414

Adiabatic evolution under quantum control  

E-Print Network (OSTI)

One of the difficulties in adiabatic quantum computation is the limit on the computation time. Here we propose two schemes to speed-up the adiabatic evolution. To apply this controlled adiabatic evolution to adiabatic quantum computation, we design one of the schemes without any prior knowledge of the instantaneous eigenstates of the final Hamiltonian. Whereas in another scheme, the control is constructed with the instantaneous eigenstate that is the target state of the control. As an illustration, we study a two-level system driven by a time-dependent magnetic field under the control. The physics behind the control scheme is explained.

Wang, W; Yi, X X

2009-01-01T23:59:59.000Z

415

Particulate matter emissions from a DISI engine under cold-fast-idle conditions for ethanol-gasoline blends  

E-Print Network (OSTI)

In an effort to build internal combustion engines with both reduced brake-specific fuel consumption and better emission control, engineers developed the Direct Injection Spark Ignition (DISI) engine. DISI engines combine ...

Dimou, Iason

2011-01-01T23:59:59.000Z

416

VEHICLE SPECIFICATIONS Vehicle Features Base Vehicle: 2011 Hyundai  

NLE Websites -- All DOE Office Websites (Extended Search)

1 Hyundai Sonata VIN: KMEHC4A43BA004932 Seatbelt Positions: 5 Standard Features: Air Conditioning Power Locks Power Steering Power Brakes Power Windows Cruise Control Front Disc...

417

MLS Group | Open Energy Information  

Open Energy Info (EERE)

Texas Zip 77598 Sector Wind energy Product Designs and makes pitch control systems for wind turbines and wind turbine brakes in US and UK under license from Antec SA. References...

418

MULTI-AGENT AUTONOMOUS PILOT FOR SINGLE-TRACK VEHICLES Dana Vrajitoru  

E-Print Network (OSTI)

from the rider also has an additional component using the centrifuge force to change direction acting on one of the control units of the vehicle, as for example, the gas, the brakes, the handlebars

Vrajitoru, Dana

419

Subsurface Contamination Control  

Science Conference Proceedings (OSTI)

There are two objectives of this report, ''Subsurface Contamination Control''. The first is to provide a technical basis for recommending limiting radioactive contamination levels (LRCL) on the external surfaces of waste packages (WP) for acceptance into the subsurface repository. The second is to provide an evaluation of the magnitude of potential releases from a defective WP and the detectability of the released contents. The technical basis for deriving LRCL has been established in ''Retrieval Equipment and Strategy for Wp on Pallet'' (CRWMS M and O 2000g, 6.3.1). This report updates the derivation by incorporating the latest design information of the subsurface repository for site recommendation. The derived LRCL on the external surface of WPs, therefore, supercede that described in CRWMS M and O 2000g. The derived LRCL represent the average concentrations of contamination on the external surfaces of each WP that must not be exceeded before the WP is to be transported to the subsurface facility for emplacement. The evaluation of potential releases is necessary to control the potential contamination of the subsurface repository and to detect prematurely failed WPs. The detection of failed WPs is required in order to provide reasonable assurance that the integrity of each WP is intact prior to MGR closure. An emplaced WP may become breached due to manufacturing defects or improper weld combined with failure to detect the defect, by corrosion, or by mechanical penetration due to accidents or rockfall conditions. The breached WP may release its gaseous and volatile radionuclide content to the subsurface environment and result in contaminating the subsurface facility. The scope of this analysis is limited to radioactive contaminants resulting from breached WPs during the preclosure period of the subsurface repository. This report: (1) documents a method for deriving LRCL on the external surfaces of WP for acceptance into the subsurface repository; (2) provides a table of derived LRCL for nuclides of radiological importance; (3) Provides an as low as is reasonably achievable (ALARA) evaluation of the derived LRCL by comparing potential onsite and offsite doses to documented ALARA requirements; (4) Provides a method for estimating potential releases from a defective WP; (5) Provides an evaluation of potential radioactive releases from a defective WP that may become airborne and result in contamination of the subsurface facility; and (6) Provides a preliminary analysis of the detectability of a potential WP leak to support the design of an airborne release monitoring system.

Y. Yuan

2001-12-12T23:59:59.000Z

420

Subsurface Contamination Control  

Science Conference Proceedings (OSTI)

There are two objectives of this report, ''Subsurface Contamination Control''. The first is to provide a technical basis for recommending limiting radioactive contamination levels (LRCL) on the external surfaces of waste packages (WP) for acceptance into the subsurface repository. The second is to provide an evaluation of the magnitude of potential releases from a defective WP and the detectability of the released contents. The technical basis for deriving LRCL has been established in ''Retrieval Equipment and Strategy for Wp on Pallet'' (CRWMS M and O 2000g, 6.3.1). This report updates the derivation by incorporating the latest design information of the subsurface repository for site recommendation. The derived LRCL on the external surface of WPs, therefore, supercede that described in CRWMS M and O 2000g. The derived LRCL represent the average concentrations of contamination on the external surfaces of each WP that must not be exceeded before the WP is to be transported to the subsurface facility for emplacement. The evaluation of potential releases is necessary to control the potential contamination of the subsurface repository and to detect prematurely failed WPs. The detection of failed WPs is required in order to provide reasonable assurance that the integrity of each WP is intact prior to MGR closure. An emplaced WP may become breached due to manufacturing defects or improper weld combined with failure to detect the defect, by corrosion, or by mechanical penetration due to accidents or rockfall conditions. The breached WP may release its gaseous and volatile radionuclide content to the subsurface environment and result in contaminating the subsurface facility. The scope of this analysis is limited to radioactive contaminants resulting from breached WPs during the preclosure period of the subsurface repository. This report: (1) documents a method for deriving LRCL on the external surfaces of WP for acceptance into the subsurface repository; (2) provides a table of derived LRCL for nuclides of radiological importance; (3) Provides an as low as is reasonably achievable (ALARA) evaluation of the derived LRCL by comparing potential onsite and offsite doses to documented ALARA requirements; (4) Provides a method for estimating potential releases from a defective WP; (5) Provides an evaluation of potential radioactive releases from a defective WP that may become airborne and result in contamination of the subsurface facility; and (6) Provides a preliminary analysis of the detectability of a potential WP leak to support the design of an airborne release monitoring system.

Y. Yuan

2001-11-16T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Analytic Controllability of Time-Dependent Quantum Control Systems  

E-Print Network (OSTI)

The question of controllability is investigated for a quantum control system in which the Hamiltonian operator components carry explicit time dependence which is not under the control of an external agent. We consider the general situation in which the state moves in an infinite-dimensional Hilbert space, a drift term is present, and the operators driving the state evolution may be unbounded. However, considerations are restricted by the assumption that there exists an analytic domain, dense in the state space, on which solutions of the controlled Schrodinger equation may be expressed globally in exponential form. The issue of controllability then naturally focuses on the ability to steer the quantum state on a finite-dimensional submanifold of the unit sphere in Hilbert space -- and thus on analytic controllability. A relatively straightforward strategy allows the extension of Lie-algebraic conditions for strong analytic controllability derived earlier for the simpler, time-independent system in which the drift Hamiltonian and the interaction Hamiltonia have no intrinsic time dependence. Enlarging the state space by one dimension corresponding to the time variable, we construct an augmented control system that can be treated as time-independent. Methods developed by Kunita can then be implemented to establish controllability conditions for the one-dimension-reduced system defined by the original time-dependent Schrodinger control problem. The applicability of the resulting theorem is illustrated with selected examples.

Chunhua Lan; Tzyh-Jong Tarn; Quo-Shin Chi; John W. Clark

2004-09-22T23:59:59.000Z

422

NREL: Wind Research - Controls Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

Controls Analysis Controls Analysis Photo of a man working inside the hub of a large 3-blades turbine. Working in the hub of Controls Advanced Research Turbine (CART) at the National Wind Technology Center (NWTC) Man in wind turbine hub viewed from inside a wind turbine's blade. At the National Wind Technology Center (NWTC), we design, implement, and test advanced wind turbine controls to maximize energy extraction and reduce structural dynamic loads. These control designs are based on linear models of the turbine that are simulated using specialized modeling software. The resulting advanced controls algorithms are field tested on the NWTC's Controls Advanced Research Turbines (CARTs). NWTC researchers are also studying blade pitch and generator torque, and employing advanced sensors to optimize power capture and reduce wind

423

Development Practice in HVAC Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Development Practice in HVAC Controls Development Practice in HVAC Controls Speaker(s): John Zhou Date: April 11, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Philip Haves The presentation will introduce development tools and design considerations used in HVAC controls development. Controls development use simulation, lab testing and field trial at different phases of the project cycle to improve control performance and to achieve rapid development. Development starts with simulation to originate and define algorithm concept. The concept is then implemented in a prototype controller, and tested in lab environment. The concept is refined and verified by analyzing lab results. In the final phase of development, controllers with refined and verified algorithms are installed in field trial sites to ensure system integration and to confirm

424

Radiation control standards and procedures  

SciTech Connect

This manual contains the Radiation Control Standards'' and Radiation Control Procedures'' at Hanford Operations which have been established to provide the necessary control radiation exposures within Irradiation Processing Department. Provision is also made for including, in the form of Bulletins'', other radiological information of general interest to IPD personnel. The purpose of the standards is to establish firm radiological limits within which the Irradiation Processing Department will operate, and to outline our radiation control program in sufficient detail to insure uniform and consistent application throughout all IPD facilities. Radiation Control Procedures are intended to prescribe the best method of accomplishing an objective within the limitations of the Radiation Control Standards. A procedure may be changed at any time provided the suggested changes is generally agreeable to management involved, and is consistent with department policies and the Radiation Control Standards.

1956-12-14T23:59:59.000Z

425

Development of Control Models and a Robust Multivariable Controller for Surface Shape Control  

SciTech Connect

Surface shape control techniques are applied to many diverse disciplines, such as adaptive optics, noise control, aircraft flutter control and satellites, with an objective to achieve a desirable shape for an elastic body by the application of distributed control forces. Achieving the desirable shape is influenced by many factors, such as, actuator locations, sensor locations, surface precision and controller performance. Building prototypes to complete design optimizations or controller development can be costly or impractical. This shortfall, puts significant value in developing accurate modeling and control simulation approaches. This thesis focuses on the field of adaptive optics, although these developments have the potential for application in many other fields. A static finite element model is developed and validated using a large aperture interferometer system. This model is then integrated into a control model using a linear least squares algorithm and Shack-Hartmann sensor. The model is successfully exercised showing functionality for various wavefront aberrations. Utilizing a verified model shows significant value in simulating static surface shape control problems with quantifiable uncertainties. A new dynamic model for a seven actuator deformable mirror is presented and its accuracy is proven through experiment. Bond graph techniques are used to generate the state space model of the multi-actuator deformable mirror including piezo-electric actuator dynamics. Using this verified model, a robust multi-input multi-output (MIMO) H{sub {infinity}} controller is designed and implemented. This controller proved superior performance as compared to a standard proportional-integral controller (PI) design.

Winters, S

2003-06-18T23:59:59.000Z

426

Humidity Control in Residences  

E-Print Network (OSTI)

Maintaining relative humidity below 60% for residential houses in humid climates promotes a healthy indoor environment. Yet, for such homes, these lower humidity levels are difficult to maintain with conventional recirculation air conditioning units. By introducing a separate vapor compression unit to pre-condition outside air, indoor relative humidity can be controlled. This new air conditioning system combines a ventilation unit with a conventional recirculation air conditioning unit. Although successful in maintaining indoor humidity levels below 60%, the new air conditioning system will require more electric energy to provide the additional dehumidification. However, this penalty is shown to be offset by reductions in sensible load during a summer week, which should result in lower energy consumption and peak electric demand during that period. The performance of this new air conditioning system is demonstrated using FSEC 3.0, a building energy simulation program developed by the Florida Solar Energy Center, to simulate the heat and moisture transport occurring within a prototypical residence located in Austin, Texas.

Trowbridge, J.; Peterson, J.

1994-01-01T23:59:59.000Z

427

Automatic temperature control  

Science Conference Proceedings (OSTI)

An automatic temperature control system is described for maintaining a preset temperature in an enclosed space in a building, comprising: heating and cooling means for conditioning the air in the enclosed space to maintain the preset temperature; exterior thermostat means outside the building for sensing ambient exterior temperature levels; interior thermostat means in the enclosed space, preset to the preset temperature to be maintained and connected with the heating and cooling means to energize the means for heating or cooling, as appropriate, when the preset temperature is reached; means defining a heat sink containing a volume of air heated by solar radiation, the volume of the heat sink being such that the temperature level therein is not affected by minor or temporary ambient temperature fluctuations; and heat sink thermostat means in the heat sink sensing the temperature in the heat sink, the heat sink thermostat means being connected in tandem with the exterior thermostat means and operative with the exterior thermostat means to switch the interior thermostat means to either a first readiness state for heating or a second readiness state for cooling, depending upon which mode is indicated by both the exterior and heat sink thermostat means, whereby the system automatically switches between heating and cooling, as required, in response to a comparison of exterior and heat sink temperatures.

Sheridan, J.P.

1986-07-22T23:59:59.000Z

428

Integrating preconcentrator heat controller  

DOE Patents (OSTI)

A method and apparatus for controlling the electric resistance heating of a metallic chemical preconcentrator screen, for example, used in portable trace explosives detectors. The length of the heating time-period is automatically adjusted to compensate for any changes in the voltage driving the heating current across the screen, for example, due to gradual discharge or aging of a battery. The total deposited energy in the screen is proportional to the integral over time of the square of the voltage drop across the screen. Since the net temperature rise, .DELTA.T.sub.s, of the screen, from beginning to end of the heating pulse, is proportional to the total amount of heat energy deposited in the screen during the heating pulse, then this integral can be calculated in real-time and used to terminate the heating current when a pre-set target value has been reached; thereby providing a consistent and reliable screen temperature rise, .DELTA.T.sub.s, from pulse-to-pulse.

Bouchier, Francis A. (Albuquerque, NM); Arakaki, Lester H. (Edgewood, NM); Varley, Eric S. (Albuquerque, NM)

2007-10-16T23:59:59.000Z

429

Buildings Stock Load Control  

E-Print Network (OSTI)

Researchers and practitioners have proposed a variety of solutions to reduce electricity consumption and curtail peak demand. This research focuses on electricity demand control by applying some strategies in existing building to reduce it during the extreme climate period. The first part of this paper presents the objectives of the study: ? to restrict the startup polluting manufacturing units (power station), ? to limit the environmental impacts (greenhouse emission), ? to reduce the transport and distribution electricity infrastructures The second part presents the approach used to rise the objectives : ? To aggregat the individual loads and to analyze the impact of different strategies from load shedding to reduce peak power demand by: ? Developing models of tertiary buildings stocks (Schools, offices, Shops, hotels); ? Making simulations for different load shedding strategies to calculate potential peak power saving. The third part is dedicated to the description of the developed models: An assembly of the various blocks of the library of simbad and simulink permit to model building. Finally the last part prensents the study results: Graphs and tables to see the load shedding strategies impacts.

Joutey, H. A.; Vaezi-Nejad, H.; Clemoncon, B.; Rosenstein, F.

2006-01-01T23:59:59.000Z

430

The averaged control system of fast oscillating control systems  

E-Print Network (OSTI)

For control systems that either have an explicit periodic dependence on time or have periodic solutions and small controls, we define an average control system that takes into account all possible variations of the control, and prove that its solutions approximate all solutions of the oscillating systems as oscillations go faster. The dimension of its velocity set is characterised geomtrically. When it is maximum the average system defines a Finsler metric, unfortunately not twice differntiable in general. Under particular assumptions, valid for the control two body system, this Finsler metric generates a Hamiltonian flow on the cotangent bundle. For minimum time control, this average system proves that averaging the Hamiltonian given by the maximum principle is a valid approximation.

Bombrun, Alex

2011-01-01T23:59:59.000Z

431

Adaptive control for energy conservation  

DOE Green Energy (OSTI)

The use of adaptive control techniques is investigated in heating, ventilating, and air cnditioning (HVAC) systems in solar heated and cooled buildings to minimize the consumption of auxiliary energy. Optimal control theory is used in conjunction with the adaptive control techniques to accomplish the minimization of auxiliary energy. The resulting technique is referred to as adaptive optimal control (AOC). This study has been made by computer simulation and is centered on the National Security and Resources Study Center (NSRSC), a large solar heated and cooled building at the Los Alamos Scientific Laboratory (LASL). Simplified models of the building and HVAC system have been developed for both the heating and cooling modes. The control strategies actually used in the NSRSC were simulated in the models and an adaptive optimal controller was developed and also simulated. Simulation runs were made with both the conventional controller and the adaptive controller and performance results of the two simulations were compared. In the first results (obtained using a partial derivative system identification method), the adaptive optimal controller model demonstrated a savings in auxiliary energy of 28.8% for the heating simulation and 18.3% for the cooling simulation when compared to the conventional controller simulation models.

Farris, D.R.

1978-01-01T23:59:59.000Z

432

EXPERIMENTAL TEST FACILITY FOR EVALUATION OF CONTROLS AND CONTROL STRATEGIES  

E-Print Network (OSTI)

Pseudo collector vs Return boiler V2 Direct heating Supplysensors Flow switches Boiler enable I DORIC 220 data loggercollector, consists of a boiler with a controlled mixing

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

433

EXPERIMENTAL TEST FACILITY FOR EVALUATION OF CONTROLS AND CONTROL STRATEGIES  

E-Print Network (OSTI)

Sept. Proc. of 3rd Annual Solar Heating and Cooling Researchence Applications, Inc. SOLAR HEATING/ COOLING TEST FACILITYperformance of different solar heating control strategies

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

434

EXPERIMENTAL TEST FACILITY FOR EVALUATION OF CONTROLS AND CONTROL STRATEGIES  

E-Print Network (OSTI)

Workshop on Control of Solar Energy Systems for Heating andand Michael Wahlig Solar Energy Group Energy and Environmentfor active hydronic solar energy systems. The experimental

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

435

NETL: Advanced NOx Emissions Control: Control Technology - Mercury...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Speciation from NOx Control University of North Dakota Energy and Environmental Research Center (UNDEERC) is addressing the impact that selective catalytic reduction (SCR),...

436

Coordinated train control and energy management control strategies  

DOE Green Energy (OSTI)

The Bay Area Rapid Transit (BART) system, in collaboration with Hughes Aircraft Company and Harmon Industries, as in the process of developing an Advanced Automatic Train Control (AATC) system to replace the current fixed-block automatic system. In the long run, the AATC system is expected to not only allow for safe short headway operation, but also to facilitate coordinated train control and energy management. This new system will employ spread spectrum radios, installed onboard trains, at wayside locations, and at control stations, to determine train locations and reliably transfer control information. Sandia National Laboratories has worked cooperatively with BART to develop a simulator of the train control and the power consumption of the AATC system. The authors are now in the process of developing enhanced train control algorithms to supplement the safety critical controller in order to smooth out train trajectories through coordinated control of multiple trains, and to reduce energy consumption and power infrastructure requirements. The control algorithms so far considered include (1) reducing peak power consumption to avoid voltage sags, especially during an outage or while clearing a backup, (2) rapid and smooth recovery from a backup, (3) avoiding oscillations due to train interference, (4) limiting needle peaks in power demand at substations to some specified level, (5) coasting, and (6) coordinating train movement, e.g., starts/stops and hills.

Gordon, S.P. [Sandia National Labs., Livermore, CA (United States); Lehrer, D.G. [Bay Area Rapid Transit District, Oakland, CA (United States)

1998-05-01T23:59:59.000Z

437

Environment control system  

SciTech Connect

A system for controlling the environment of an enclosed area in nuclear reactor installations. The system permits the changing of the environment from nitrogen to air, or from air to nitrogen, without the release of any radioactivity or process gas to the outside atmosphere. In changing from a nitrogen to an air environment, oxygen is inserted into the enclosed area at the same rate which the nitrogen-oxygen gas mixture is removed from the enclosed area. The nitrogen-oxygen gas mixture removed from the enclosed area is mixed with hydrogen, the hydrogen recombining with the oxygen present in the gas to form water. The water is then removed from the system and, if it contains any radioactive products, can be utilized to form concrete, which can then be transferred to a licensed burial site. The process gas is purified further by stripping it of carbon dioxide and then distilling it to remove any xenon, krypton, and other fission or non-condensable gases. The pure nitrogen is stored as either a cryogenic liquid or a gas. In changing from an air to nitrogen environment, the gas is removed from the enclosed area, mixed with hydrogen to remove the oxygen present, dried, passed through adsorption beds to remove any fission gases, and reinserted into the enclosed area. Additionally, the nitrogen stored during the nitrogen to air change, is inserted into the enclosed area, the nitrogen from both sources being inserted into the enclosed area at the same rate as the removal of the gas from the containment area. As designed, the amount of nitrogen stored during the nitrogen to air change substantially equals that required to replace oxygen removed during an air to nitrogen change.

Sammarone, Dino G. (Edgewood Borough, PA)

1978-01-01T23:59:59.000Z

438

DOE standard: Radiological control  

Science Conference Proceedings (OSTI)

The Department of Energy (DOE) has developed this Standard to assist line managers in meeting their responsibilities for implementing occupational radiological control programs. DOE has established regulatory requirements for occupational radiation protection in Title 10 of the Code of Federal Regulations, Part 835 (10 CFR 835), ``Occupational Radiation Protection``. Failure to comply with these requirements may lead to appropriate enforcement actions as authorized under the Price Anderson Act Amendments (PAAA). While this Standard does not establish requirements, it does restate, paraphrase, or cite many (but not all) of the requirements of 10 CFR 835 and related documents (e.g., occupational safety and health, hazardous materials transportation, and environmental protection standards). Because of the wide range of activities undertaken by DOE and the varying requirements affecting these activities, DOE does not believe that it would be practical or useful to identify and reproduce the entire range of health and safety requirements in this Standard and therefore has not done so. In all cases, DOE cautions the user to review any underlying regulatory and contractual requirements and the primary guidance documents in their original context to ensure that the site program is adequate to ensure continuing compliance with the applicable requirements. To assist its operating entities in achieving and maintaining compliance with the requirements of 10 CFR 835, DOE has established its primary regulatory guidance in the DOE G 441.1 series of Guides. This Standard supplements the DOE G 441.1 series of Guides and serves as a secondary source of guidance for achieving compliance with 10 CFR 835.

Not Available

1999-07-01T23:59:59.000Z

439

Transformaciones del Estado y las nuevas exigencias del control de la corrupcin: transparencia fiscal, control administrativo y control social.  

E-Print Network (OSTI)

??[ES] Tesis doctoral sobre las transformaciones del Estado y las nuevas exigencias del control de la corrupcin: transparencia fiscal, control administrativo y control social.; [EN] (more)

Mileski, Helio Saul

2011-01-01T23:59:59.000Z

440

Document Control Template-Process  

NLE Websites -- All DOE Office Websites (Extended Search)

1_ADocument Control Template - Process.doc Page 1 of 7 1_ADocument Control Template - Process.doc Page 1 of 7 EOTA - Business Process Document Title: Document Control Template - Process Document Number: F-001 Rev. A Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: P-001, Document Control Process Notify of Changes: EOTA Employees Referenced Document(s): N/A F-001_ADocument Control Template - Process.doc Page 2 of 7 Revision History: Rev. Description of Change A Initial Release B C D E F-001_ADocument Control Template - Process.doc Page 3 of 7 EOTA - Business Process Document Title: DocTitle Document Number: P-DocID# Rev Document Owner: Elizabeth Sousa Backup Owner: David McKay Approver(s): Dennis Murphy Parent Document:

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Digitally controlled distributed phase shifter  

DOE Patents (OSTI)

A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one of two discrete bias voltages. The application of the discrete bias voltages change the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

Hietala, V.M.; Kravitz, S.H.; Vawter, G.A.

1992-12-31T23:59:59.000Z

442

Digitally controlled distributed phase shifter  

DOE Patents (OSTI)

A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one or two discrete bias voltages. The application of the discrete bias voltages changes the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

Hietala, V.M.; Kravitz, S.H.; Vawter, G.A.

1993-08-17T23:59:59.000Z

443

Monitoring Control Applications at CERN  

E-Print Network (OSTI)

The Industrial Controls and Engineering (EN-ICE) group [1] of the Engineering Department at CERN has produced, and is responsible for the operation of around 60 applications, which control critical processes in the domains of cryogenics, quench protection systems, power interlocks for the Large Hadron Collider and other subsystems of the accelerator complex. These applications require 24/7 operation and a quick reaction to problems. For this reason the EN-ICE group is presently developing the Monitoring Operation of cOntrols Networks (MOON) tool to detect, anticipate and inform of possible anomalies in the integrity of the applications. The tool builds on top of Simatic WinCC Open Architecture (WinCC OA) [2] SCADA and makes usage of the Joint COntrols Project (JCOP) [3] and the UNified INdustrial COntrol System (UNICOS) [4] Frameworks developed at CERN. The tool provides centralized monitoring and software management of the different elements integrating the control systems like Windows and L...

Bernard, F; Milcent, H; Petrova, L B; Varela, F

2011-01-01T23:59:59.000Z

444

Integrated control system and method  

DOE Patents (OSTI)

An integrated control system for use with an engine connected to a generator providing electrical power to a switchgear is disclosed. The engine receives gas produced by a gasifier. The control system includes an electronic controller associated with the gasifier, engine, generator, and switchgear. A gas flow sensor monitors a gas flow from the gasifier to the engine through an engine gas control valve and provides a gas flow signal to the electronic controller. A gas oversupply sensor monitors a gas oversupply from the gasifier and provides an oversupply signal indicative of gas not provided to the engine. A power output sensor monitors a power output of the switchgear and provide a power output signal. The electronic controller changes gas production of the gasifier and the power output rating of the switchgear based on the gas flow signal, the oversupply signal, and the power output signal.

Wang, Paul Sai Keat; Baldwin, Darryl; Kim, Myoungjin

2013-10-29T23:59:59.000Z

445

Adaptive control for energy conservation  

DOE Green Energy (OSTI)

The objective of this project is to investigate the use of adaptive control concepts in buildings with solar-assisted heating, ventilating, and air-conditioning (HVAC) systems to maintain occupant comfort conditions while minimizing auxiliary energy use. Accomplishing this objective requires an energy management system capable of making sound tradeoffs. Optimal control theory is used along with a system identification technique to provide an adaptable stratgy. The resulting overall approach is known as adaptive optimal control (AOC).

Farris, D.R.

1980-03-01T23:59:59.000Z

446

Pump control system for windmills  

DOE Patents (OSTI)

A windmill control system having lever means, for varying length of stroke of the pump piston, and a control means, responsive to the velocity of the wind to operate the lever means to vary the length of stroke and hence the effective displacement of the pump in accordance with available wind energy, with the control means having a sensing member separate from the windmill disposed in the wind and displaceable thereby in accordance with wind velocity.

Avery, Don E. (45-437 Akimala St., Honolulu, HI 96744)

1983-01-01T23:59:59.000Z

447

Control Relay Aging Management Guideline  

Science Conference Proceedings (OSTI)

The concept for this report came from the concern that many control relays have been in service for an extended period of time and an effective aging management program may not be in place for these relays. In addition, recent Institute of Nuclear Power Operations (INPO) data indicate that relays are one of the leading component types causing scrams. With control relay age increasing and relays being a significant contributor to scrams, an evaluation of control relay maintenance and replacement strategie...

2011-05-03T23:59:59.000Z

448

Quantum error control codes  

E-Print Network (OSTI)

It is conjectured that quantum computers are able to solve certain problems more quickly than any deterministic or probabilistic computer. For instance, Shor's algorithm is able to factor large integers in polynomial time on a quantum computer. A quantum computer exploits the rules of quantum mechanics to speed up computations. However, it is a formidable task to build a quantum computer, since the quantum mechanical systems storing the information unavoidably interact with their environment. Therefore, one has to mitigate the resulting noise and decoherence effects to avoid computational errors. In this dissertation, I study various aspects of quantum error control codes - the key component of fault-tolerant quantum information processing. I present the fundamental theory and necessary background of quantum codes and construct many families of quantum block and convolutional codes over finite fields, in addition to families of subsystem codes. This dissertation is organized into three parts: Quantum Block Codes. After introducing the theory of quantum block codes, I establish conditions when BCH codes are self-orthogonal (or dual-containing) with respect to Euclidean and Hermitian inner products. In particular, I derive two families of nonbinary quantum BCH codes using the stabilizer formalism. I study duadic codes and establish the existence of families of degenerate quantum codes, as well as families of quantum codes derived from projective geometries. Subsystem Codes. Subsystem codes form a new class of quantum codes in which the underlying classical codes do not need to be self-orthogonal. I give an introduction to subsystem codes and present several methods for subsystem code constructions. I derive families of subsystem codes from classical BCH and RS codes and establish a family of optimal MDS subsystem codes. I establish propagation rules of subsystem codes and construct tables of upper and lower bounds on subsystem code parameters. Quantum Convolutional Codes. Quantum convolutional codes are particularly well-suited for communication applications. I develop the theory of quantum convolutional codes and give families of quantum convolutional codes based on RS codes. Furthermore, I establish a bound on the code parameters of quantum convolutional codes - the generalized Singleton bound. I develop a general framework for deriving convolutional codes from block codes and use it to derive families of non-catastrophic quantum convolutional codes from BCH codes. The dissertation concludes with a discussion of some open problems.

Abdelhamid Awad Aly Ahmed, Sala

2008-05-01T23:59:59.000Z

449

Access Control Policy Tool (ACPT)  

Science Conference Proceedings (OSTI)

... In regard to cyber security, privacy, and information sharing, access control is one of the crucial elements in protecting the nation's critical IT ...

2013-01-15T23:59:59.000Z

450

NETL: CO2 Control - Other  

NLE Websites -- All DOE Office Websites (Extended Search)

Other Other Active and completed projects researching other novel methods for CO2 control. Other Projects (click to expand close) Active Other Projects Geological...

451

The APS control system network  

SciTech Connect

The APS accelerator control system is a distributed system consisting of operator interfaces, a network, and computer-controlled interfaces to hardware. This implementation of a control system has come to be called the {open_quotes}Standard Model.{close_quotes} The operator interface is a UNDC-based workstation with an X-windows graphical user interface. The workstation may be located at any point on the facility network and maintain full functionality. The function of the network is to provide a generalized communication path between the host computers, operator workstations, input/output crates, and other hardware that comprise the control system. The crate or input/output controller (IOC) provides direct control and input/output interfaces for each accelerator subsystem. The network is an integral part of all modem control systems and network performance will determine many characteristics of a control system. This paper will describe the overall APS network and examine the APS control system network in detail. Metrics are provided on the performance of the system under various conditions.

Sidorowicz, K.V.; McDowell, W.P.

1995-12-31T23:59:59.000Z

452

Export Control | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Security and Isotope Technology Division Export Control Team promotes the U.S. nonproliferation agenda by providing policy interpretation, technical guidance, and support to...

453

Computer Applications and Process Control  

Science Conference Proceedings (OSTI)

"The Computer-Aided Design and Manufacture of Sheet Metal Parts" (Forum Feature), R. Brandegger, July 1990, pp. 48-50. "Control Aspects of the Mitsubishi

454

WIPP - Passive Institutional Controls (PICs)  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy has developed a program for the development of Passive Institutional Controls to alert future generations to the potential hazards of intersecting the Waste Isolation Pilot...

455

Control Strategies For Transit Priority  

E-Print Network (OSTI)

Light Rail Transit," Transportation Research Record, No.Rail Signal Control Strategies by Combining Transit and Traffic Simulation Models," Transportation Research

Skabardonis, Alexander

1998-01-01T23:59:59.000Z

456

Available Technologies: Spatially Controlled Surface ...  

This spatial control of functionality is very difficult to achieve with non-grafting techniques currently in use such as direct copolymerization, ...

457

CONTROL SYSTEM FOR NEUTRONIC REACTORS  

DOE Patents (OSTI)

BS>A slow-acting shim rod for control of major variations in reactor neutron flux and a fast-acting control rod to correct minor flux variations are employed to provide a sensitive, accurate control system. The fast-acting rod is responsive to an error signal which is produced by changes in the neutron flux from a predetermined optimum level. When the fast rod is thus actuated in a given direction, means is provided to actuate the slow-moving rod in that direction to return the fast rod to a position near the midpoint of its control range. (AEC)

Crever, F.E.

1962-05-01T23:59:59.000Z

458

Steam Boiler Control Specification Problem:  

E-Print Network (OSTI)

Our solution to the specification problem in the specification language TLA+ is based on a model of operation where several components proceed synchronously. Our first specification concerns a simplified controller and abstracts from many details given in the informal problem description. We successively add modules to build a model of the state of the steam boiler, detect failures, and model message transmission. We give a more detailed controller specification and prove that it refines the abstract controller. We also address the relationship between the physical state of the steam boiler and the model maintained by the controller and discuss the reliability of failure detection. Finally, we discuss the implementability of our specification.

Tla Solution Frank; Frank Le Ke; Stephan Merz

1996-01-01T23:59:59.000Z

459

Avoid advanced control project mistakes  

Science Conference Proceedings (OSTI)

On-line process optimization is worth working for but without robust advanced controls it will never happen. In this paper, the author evaluates how well advanced controls worked in five refineries. Having spent money on such projects, the refineries faced a situation in which there was no measurable improvement in overall plant performance. These refineries are owned by different companies, yet they share a pattern of mistakes in administrating advanced controls. Highlighting these mistakes shows ways to improve the organization of advanced control technology, to avoid obvious pitfalls.

Friedman, Y.Z. (Petrocontrol, Madison, NJ (United States))

1992-10-01T23:59:59.000Z

460

Distributed Control for Smart Lighting.  

E-Print Network (OSTI)

??In this research, we investigate designing a smart lighting system. By extending and enhancing the centralized and distributed control algorithms we try to address the (more)

Phadke, Swanand Shripad

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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461

Controlled Processing of Mesoporous ??Fe  

Science Conference Proceedings (OSTI)

The liquid mixtures were processed into amorphous solid foams in a microwave oven under controlled sensor heating process. Based on TGA/DSC experiments

462

Radiation Safety Work Control Form  

NLE Websites -- All DOE Office Websites (Extended Search)

Radiation Safety Work Control Form (see instructions on pg-2) Rev July-2012 Area: Form : Date: Preliminary Applicability Screen: (a) Will closing the beam line injection stoppers...

463

Document Control Template-Form  

NLE Websites -- All DOE Office Websites (Extended Search)

3 Media Requests 080904 EOTA - Business Form Document Title: ITTP-018, Media Inventory Control Document Number: Media Requests ITT, ADM Ben Aragon NA Referenced Documents: Parent...

464

Pollution Control Facilities (South Carolina)  

Energy.gov (U.S. Department of Energy (DOE))

For the purpose of this legislation, pollution control facilities are defined as any facilities designed for the elimination, mitigation or prevention of air or water pollution, including all...

465

Guidelines for Particulate Control for Advanced SO2 Control Processes  

Science Conference Proceedings (OSTI)

To assist utilities in complying with Phase II of the Clean Air Act Amendments, this report delineates the effects of advanced SO2 control technologies on particulate control systems. This guide can prove invaluable to environmental engineers and planners who must select compatible systems and identify sound operating strategies for these technologies.

1994-12-30T23:59:59.000Z

466

Building Blocks for Tobacco Control: A Handbook  

E-Print Network (OSTI)

BLOCKS FOR TOBACCO CONTROL: A HANDBOOK BUILDING BLOCKS FORTOBACCO CONTROL: A HANDBOOK BUILDING BLOCKS FORTOBACCO CONTROL: A HANDBOOK BUILDING BLOCKS FOR TOBACCO

World Health Organization

2004-01-01T23:59:59.000Z

467

Frequency Control Performance Measurement and Requirements  

E-Print Network (OSTI)

power systems operations could significantly influence primary frequency control.power system operations could not significantly influence primary frequency control.power system operations. Determination of frequency control

Illian, Howard F.

2011-01-01T23:59:59.000Z

468

Model Predictive Control for Energy Efficient Buildings  

E-Print Network (OSTI)

P. Haves et al. Model Predictive Control of HVAC Systems:Bilinear Model Predictive Control of a HVAC System Usingof model predictive control algorithms for HVAC systems.

Ma, Yudong

2012-01-01T23:59:59.000Z

469

Federal Energy Management Program: Lighting Control Types  

NLE Websites -- All DOE Office Websites (Extended Search)

Lighting Control Types Characteristics of the most common lighting controls for offices and other public buildings are outlined below. Typical Lighting Control Applications...

470

Nonlinear Control of Delay and PDE Systems  

E-Print Network (OSTI)

Conference on Control and Systems, 1997. [151] O. Roesch, H.Adaptive Control for Systems with Uncertain Plant Pa-Stability of networked control systems with uncertain time-

Bekiaris-Liberis, Nikolaos

471

Automotive Powertrain Control - A Survey  

E-Print Network (OSTI)

This paper surveys recent and historical publications on automotive powertrain control. Controloriented models of gasoline and diesel engines and their aftertreatment systems are reviewed, and challenging control problems for conventional engines, hybrid vehicles and fuel cell powertrains are discussed. Fundamentals are revisited and advancements are highlighted. A comprehensive list of references is provided. 1

Jeffrey A. Cook; Jing Sun; Julia H. Buckl; Ilya V. Kolmanovsky; Huei Peng; Jessy W. Grizzle

2006-01-01T23:59:59.000Z

472

Statistical global metabolic control analysis  

Science Conference Proceedings (OSTI)

This work introduces the concept of global sensitivity based on simultaneous variation of a complete set of enzymes, metabolite concentrations, and cofactors in finite ranges of concentrations. Perturbations are defined by finite ranges of concentrations ... Keywords: MCA metabolic control analysis, flux control coefficients, global sensitivity, homeostasis

Zelimir Kurtanjek

2009-03-01T23:59:59.000Z

473

Proceedings: 2000 NOx Controls Workshop  

Science Conference Proceedings (OSTI)

The 2000 EPRI workshop on nitrogen oxide (NOx) controls for utility boilers provided a medium for member utilities to augment their knowledge of recent operating experience and developments on NOx control technologies. The event focused on improving methods of compliance with emission regulations mandated by the Clean Air Act Amendments (CAAA) of 1990 without jeopardizing efficiency and plant performance.

2001-04-10T23:59:59.000Z

474

TIMEOPTIMAL CONTROL FOR UNDERWATER VEHICLES  

E-Print Network (OSTI)

TIME­OPTIMAL CONTROL FOR UNDERWATER VEHICLES M. Chyba #,1 N.E. Leonard #,1 E.D. Sontag ##,2 problems for a special class of controlled mechanical systems, underwater vehicles. Lie algebras associated­optimal trajectories. We apply the general theory to a model of an underwater vehicle and illustrate our results

Sontag, Eduardo

475

Energy-efficient congestion control  

Science Conference Proceedings (OSTI)

Various link bandwidth adjustment mechanisms are being developed to save network energy. However, their interaction with congestion control can significantly reduce network throughput, and is not well understood. We firstly put forward a framework to ... Keywords: bandwidth adjustment, congestion control, stability

Lingwen Gan; Anwar Walid; Steven Low

2012-06-01T23:59:59.000Z

476

Dual control active superconductive devices  

DOE Patents (OSTI)

A superconducting active device has dual control inputs and is constructed such that the output of the device is effectively a linear mix of the two input signals. The device is formed of a film of superconducting material on a substrate and has two main conduction channels, each of which includes a weak link region. A first control line extends adjacent to the weak link region in the first channel and a second control line extends adjacent to the weak link region in the second channel. The current flowing from the first channel flows through an internal control line which is also adjacent to the weak link region of the second channel. The weak link regions comprise small links of superconductor, separated by voids, through which the current flows in each channel. Current passed through the control lines causes magnetic flux vortices which propagate across the weak link regions and control the resistance of these regions. The output of the device taken across the input to the main channels and the output of the second main channel and the internal control line will constitute essentially a linear mix of the two input signals imposed on the two control lines. The device is especially suited to microwave applications since it has very low input capacitance, and is well suited to being formed of high temperature superconducting materials since all of the structures may be formed coplanar with one another on a substrate.

Martens, Jon S. (Albuquerque, NM); Beyer, James B. (Madison, WI); Nordman, James E. (Madison, WI); Hohenwarter, Gert K. G. (Madison, WI)

1993-07-20T23:59:59.000Z

477

Intrinsically resilient energy control systems  

Science Conference Proceedings (OSTI)

To preserve critical energy control functions while under attack, it is necessary to perform comprehensive analysis on the root cause and impact of an ongoing cyber intrusion without sacrificing the availability of energy delivery. In this position paper, ... Keywords: cybersecurity, data integration, energy control system, intrusion-tolerant scada, knowledge base, ontology, root cause analysis, semantic annotation, situational awareness

Frederick Sheldon; Daniel Fetzer; David Manz; Jingshan Huang; Stuart Goose; Thomas Morris; Jiangbo Dang; Jonathan Kirsch; Dong Wei

2013-01-01T23:59:59.000Z

478

AQUATIC PLANT CONTROL RESEARCH PROGRAM  

E-Print Network (OSTI)

AQUATIC PLANT CONTROL RESEARCH PROGRAM TECHNICAL REPORT A-S3-1 AERIAL SURVEY TECHNIQUES TO MAP NUMBER rGOVT ACCESSION NO. 3. Technical Report A-83-l 4. TI T L E (""d Subtitle) 5. AERIAL SURVEY···..,." -.d Identity by block numb,,,) Aerial surveys Computer applications Aquatic plant control Mapping

US Army Corps of Engineers

479

Johnson Controls | Open Energy Information  

Open Energy Info (EERE)

Controls Controls Jump to: navigation, search Logo: Johnson Controls Name Johnson Controls Address 5757 N. Green Bay Avenue Place Milwaukee, Wisconsin Zip 53201 Sector Efficiency Stock Symbol JCI Website http://www.johnsoncontrols.com Coordinates 43.1219149°, -87.9353576° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.1219149,"lon":-87.9353576,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

480

Moisture Control | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Moisture Control Moisture Control Moisture Control May 30, 2012 - 10:41am Addthis Controlling moisture can make your home more energy-efficient, less costly to heat and cool, more comfortable, and prevent mold growth. Controlling moisture can make your home more energy-efficient, less costly to heat and cool, more comfortable, and prevent mold growth. What does this mean for me? Moisture can support the growth of mold and mildew and can even rot structural members in extreme cases. Effective strategies for addressing moisture in your home will depend on your climate and how your home is constructed. How does it work? Moisture can enter a home as water vapor and as liquid water. Sealing air leaks and providing paths for liquid water to move away from the building can prevent moisture from causing health and comfort problems in your home.

Note: This page contains sample records for the topic "brakes traction control" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

SOWFA + Super Controller User's Manual  

DOE Green Energy (OSTI)

SOWFA + Super Controller is a modification of the NREL's SOWFA tool which allows for a user to apply multiturbine or centralized wind plant control algorithms within the high-fidelity SOWFA simulation environment. The tool is currently a branch of the main SOWFA program, but will one day will be merged into a single version. This manual introduces the tool and provides examples such that a user can implement the