Sample records for regenerative braking cvt

  1. Regenerative braking device

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1982-01-12T23:59:59.000Z

    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.

  2. Combined hydraulic and regenerative braking system

    DOE Patents [OSTI]

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

    1981-06-02T23:59:59.000Z

    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.

  3. Variable ratio regenerative braking device

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1981-12-15T23:59:59.000Z

    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.

  4. Adaptive controller for regenerative and friction braking system

    DOE Patents [OSTI]

    Davis, Roy I. (Ypsilanti, MI)

    1990-01-01T23:59:59.000Z

    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.

  5. Adaptive controller for regenerative and friction braking system

    DOE Patents [OSTI]

    Davis, R.I.

    1990-10-16T23:59:59.000Z

    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.

  6. Electric vehicle regenerative antiskid braking and traction control system

    DOE Patents [OSTI]

    Cikanek, S.R.

    1995-09-12T23:59:59.000Z

    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.

  7. Electric vehicle regenerative antiskid braking and traction control system

    DOE Patents [OSTI]

    Cikanek, Susan R. (Wixom, MI)

    1995-01-01T23:59:59.000Z

    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.

  8. Regenerative braking device with rotationally mounted energy storage means

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI)

    1982-03-16T23:59:59.000Z

    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.

  9. Fuzzy logic electric vehicle regenerative antiskid braking and traction control system

    DOE Patents [OSTI]

    Cikanek, S.R.

    1994-10-25T23:59:59.000Z

    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.

  10. Fuzzy logic electric vehicle regenerative antiskid braking and traction control system

    DOE Patents [OSTI]

    Cikanek, Susan R. (Wixom, MI)

    1994-01-01T23:59:59.000Z

    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.

  11. Regenerative braking on bicycles to power LED safety flashers

    E-Print Network [OSTI]

    Collier, Ian M

    2005-01-01T23:59:59.000Z

    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, ...

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

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    Regenerative Braking for an Electric Vehicle Using Ultracapacitors and a Buck-Boost Converter Juan for an Electric Vehicle has been simulated. The purpose of this device is to allow higher accelerations, similar in shape and size to a Chevrolet S-10. This vehicle was already converted to an electric car

  13. Design Principles of a flywheel Regenerative Braking System (f-RBS) for Formula SAE type racecar and system testing on a Virtual Test Rig modeled on MSC ADAMS

    E-Print Network [OSTI]

    Pochiraju, Anirudh

    2012-08-31T23:59:59.000Z

    This thesis presents a flywheel based mechanical regenerative braking system (RBS) concept for a Formula SAE type race car application, to improve the performance and/or efficiency of the racecar. A mechanical system is chosen to eliminate losses...

  14. Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew McGrath, Hurst Nuckols, Grant Wilson Adviser: Dr. Andrew Jackson

    E-Print Network [OSTI]

    Carpick, Robert W.

    Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew Mc Pressure Reservior Filter Variable Vane Pump Motor/Pump Hydraulic Accumulators Solenoid Valve Relief Valve Suction Line Since their development in 2006, hydraulic drivetrain systems have gained considerable

  15. Design of an Anti-Lock Regenerative Braking System for a ...14 International Journal of Automotive Engineering Vol. 1, Number 2, June 2011

    E-Print Network [OSTI]

    Vaziri, Ashkan

    energy storage system and subsequently used for the propulsion, significantly reducing the vehicle the brake of a vehicle [1]. The total energy dissipated through braking during a typical urban area drive

  16. Brake blending strategy for a hybrid vehicle

    DOE Patents [OSTI]

    Boberg, Evan S. (Hazel Park, MI)

    2000-12-05T23:59:59.000Z

    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.

  17. Braking system

    DOE Patents [OSTI]

    Norgren, D.U.

    1982-09-23T23:59:59.000Z

    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.

  18. Modeling of capacitive and electromagnetic field shielding effects in a CVT.

    SciTech Connect (OSTI)

    Gover, James E. (Kettering University); Bou, Jimmy; Sommerville, William (Kettering University); Sanchez, Robert O.

    2005-08-01T23:59:59.000Z

    In the discharge of a capacitor the current was measured with a current viewing transformer (CVT). In addition to measuring the current flowing through the CVT primary, a 51 MHz noise signal was added to the primary current. When the CVT was covered with a gold shield, the noise was eliminated. Analysis of the measured results indicate that the gold layer reflected the electromagnetic that was generated by current flowing in the primary and that the capacitance between the shield and the CVT secondary had no measurable effect on the CVT output.

  19. The Constant Voltage Transformer (CVT) for Mitigating Effects of Voltage Sags on Industrial Equipment

    E-Print Network [OSTI]

    Ferraro, R. J.; Osborne, R.; Stephens, R.

    ) an increase in loads that use power electronics in some type of power conversion configuration [1][2]. This paper presents applications of the constant-voltage transformer (CVT) for mitigating the effects of electric service voltage sags on industrial...

  20. Vehicle brake testing system

    DOE Patents [OSTI]

    Stevens, Samuel S. (Harriman, TN); Hodgson, Jeffrey W. (Lenoir City, TN)

    2002-11-19T23:59:59.000Z

    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.

  1. Therapeutic potential of nanoceria in regenerative medicine....

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Therapeutic potential of nanoceria in regenerative medicine. Therapeutic potential of nanoceria in regenerative medicine. Abstract: Tissue engineering and regenerative medicine aim...

  2. Adaptation of the CVT algorithm for catheter optimization in high dose rate brachytherapy

    SciTech Connect (OSTI)

    Poulin, Eric; Fekete, Charles-Antoine Collins; Beaulieu, Luc [Département de Physique, de Génie Physique et d’Optique et Centre de recherche sur le cancer de l’Université Laval, Université Laval, Québec, Québec G1V 0A6, Canada and Département de Radio-Oncologie et Axe oncologie du Centre de Recherche du CHU de Québec, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada)] [Département de Physique, de Génie Physique et d’Optique et Centre de recherche sur le cancer de l’Université Laval, Université Laval, Québec, Québec G1V 0A6, Canada and Département de Radio-Oncologie et Axe oncologie du Centre de Recherche du CHU de Québec, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada); Létourneau, Mélanie [Département de Radio-Oncologie, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada)] [Département de Radio-Oncologie, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada); Fenster, Aaron [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Ontario N6A 5K8 (United Kingdom)] [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Ontario N6A 5K8 (United Kingdom); Pouliot, Jean [Department of Radiation Oncology, University of California San Francisco, Helen Diller Family Comprehensive Cancer Center, 1600 Divisadero Street, San Francisco, California 94143-1708 (United States)] [Department of Radiation Oncology, University of California San Francisco, Helen Diller Family Comprehensive Cancer Center, 1600 Divisadero Street, San Francisco, California 94143-1708 (United States)

    2013-11-15T23:59:59.000Z

    Purpose: An innovative, simple, and fast method to optimize the number and position of catheters is presented for prostate and breast high dose rate (HDR) brachytherapy, both for arbitrary templates or template-free implants (such as robotic templates).Methods: Eight clinical cases were chosen randomly from a bank of patients, previously treated in our clinic to test our method. The 2D Centroidal Voronoi Tessellations (CVT) algorithm was adapted to distribute catheters uniformly in space, within the maximum external contour of the planning target volume. The catheters optimization procedure includes the inverse planning simulated annealing algorithm (IPSA). Complete treatment plans can then be generated from the algorithm for different number of catheters. The best plan is chosen from different dosimetry criteria and will automatically provide the number of catheters and their positions. After the CVT algorithm parameters were optimized for speed and dosimetric results, it was validated against prostate clinical cases, using clinically relevant dose parameters. The robustness to implantation error was also evaluated. Finally, the efficiency of the method was tested in breast interstitial HDR brachytherapy cases.Results: The effect of the number and locations of the catheters on prostate cancer patients was studied. Treatment plans with a better or equivalent dose distributions could be obtained with fewer catheters. A better or equal prostate V100 was obtained down to 12 catheters. Plans with nine or less catheters would not be clinically acceptable in terms of prostate V100 and D90. Implantation errors up to 3 mm were acceptable since no statistical difference was found when compared to 0 mm error (p > 0.05). No significant difference in dosimetric indices was observed for the different combination of parameters within the CVT algorithm. A linear relation was found between the number of random points and the optimization time of the CVT algorithm. Because the computation time decrease with the number of points and that no effects were observed on the dosimetric indices when varying the number of sampling points and the number of iterations, they were respectively fixed to 2500 and to 100. The computation time to obtain ten complete treatments plans ranging from 9 to 18 catheters, with the corresponding dosimetric indices, was 90 s. However, 93% of the computation time is used by a research version of IPSA. For the breast, on average, the Radiation Therapy Oncology Group recommendations would be satisfied down to 12 catheters. Plans with nine or less catheters would not be clinically acceptable in terms of V100, dose homogeneity index, and D90.Conclusions: The authors have devised a simple, fast and efficient method to optimize the number and position of catheters in interstitial HDR brachytherapy. The method was shown to be robust for both prostate and breast HDR brachytherapy. More importantly, the computation time of the algorithm is acceptable for clinical use. Ultimately, this catheter optimization algorithm could be coupled with a 3D ultrasound system to allow real-time guidance and planning in HDR brachytherapy.

  3. Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues

    E-Print Network [OSTI]

    Short, Daniel

    Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues: XAS XANES EXAFS Antimony Particulate matter Brake linings a b s t r a c t Insights into the speciation of Sb in samples of brake linings, brake pad wear residues, road dust, and atmospheric particulate

  4. Regenerative feedback resonant circuit

    DOE Patents [OSTI]

    Jones, A. Mark; Kelly, James F.; McCloy, John S.; McMakin, Douglas L.

    2014-09-02T23:59:59.000Z

    A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured.

  5. AVCEM: Advanced Vehicle Cost and Energy Use Model. Overview of AVCEM

    E-Print Network [OSTI]

    Delucchi, Mark

    2005-01-01T23:59:59.000Z

    accounted separately), regenerative braking, battery thermalthere is no regenerative braking, and vehicle efficiency,iterative calculations. Regenerative braking is represented

  6. AVCEM: Advanced-Vehicle Cost and Energy Use Model

    E-Print Network [OSTI]

    Delucchi, Mark

    2005-01-01T23:59:59.000Z

    accounted separately), regenerative braking, battery thermalthere is no regenerative braking, and vehicle efficiency,iterative calculations. Regenerative braking is represented

  7. Simulations of Plug-in Hybrid Vehicles Using Advanced Lithium Batteries and Ultracapacitors on Various Driving Cycles

    E-Print Network [OSTI]

    Burke, Andy; Zhao, Hengbing

    2010-01-01T23:59:59.000Z

    capability and thus regenerative braking performancecapability and thus regenerative braking performanceaccept all the regenerative braking energy. This paper is

  8. Investigation of a regenerative damping concept

    E-Print Network [OSTI]

    Fodor, Michael Glenn

    1993-01-01T23:59:59.000Z

    This thesis presents a justification for the study of regenerative damping, a general statement of the regenerative damping problem, and a detailed analysis of a specific proposed solution to the regenerative damping problem. Improvement...

  9. Regenerative air heater

    DOE Patents [OSTI]

    Hasselquist, P.B.; Baldner, R.

    1980-11-26T23:59:59.000Z

    A gas-cooled steel skirt is used to support a refractory cored brick matrix and dome structure in a high temperature regenerative air heater useful in magnetohydrodynamic power generation. The steel skirt thermally expands to accommodate the thermal expansion of the dome structure despite substantial temperature differential thereby reducing relative movement between the dome bricks. Gas cooling of the steel skirt allows the structure to operate above its normal temperature during clean-out cycles and also allows for the control of the thermal expansion of the steel skirt.

  10. Regenerative air heater

    DOE Patents [OSTI]

    Hasselquist, Paul B. (Maple Grove, MN); Baldner, Richard (Minnetonka, MN)

    1982-01-01T23:59:59.000Z

    A gas-cooled steel skirt is used to support a refractory cored brick matrix and dome structure in a high temperature regenerative air heater useful in magnetohydrodynamic power generation. The steel skirt thermally expands to accommodate the thermal expansion of the dome structure despite substantial temperature differential thereby reducing relative movement between the dome bricks. Gas cooling of the steel skirt allows the structure to operate above its normal temperature during clean-out cycles and also allows for the control of the thermal expansion of the steel skirt.

  11. Commercial Motor Vehicle Brake Assessment Tools

    E-Print Network [OSTI]

    Commercial Motor Vehicle Brake Assessment Tools Commercial Motor Vehicle Roadside Technology to deceleration in g's ­ Passing score: BE43.5 · Enforcement tool for only 3 years. · Based solely on brake Brake Research · CMVRTC research built on these enforcement tools ­ Correlation Study ­ Level-1 / PBBT

  12. Regenerative combustion device

    DOE Patents [OSTI]

    West, Phillip B.

    2004-03-16T23:59:59.000Z

    A regenerative combustion device having a combustion zone, and chemicals contained within the combustion zone, such as water, having a first equilibrium state, and a second combustible state. Means for transforming the chemicals from the first equilibrium state to the second combustible state, such as electrodes, are disposed within the chemicals. An igniter, such as a spark plug or similar device, is disposed within the combustion zone for igniting combustion of the chemicals in the second combustible state. The combustion products are contained within the combustion zone, and the chemicals are selected such that the combustion products naturally chemically revert into the chemicals in the first equilibrium state following combustion. The combustion device may thus be repeatedly reused, requiring only a brief wait after each ignition to allow the regeneration of combustible gasses within the head space.

  13. Disturbance Control of the Hydraulic Brake in a Wind Turbine

    E-Print Network [OSTI]

    Yang, Zhenyu

    Disturbance Control of the Hydraulic Brake in a Wind Turbine Frank Jepsen, Anders Søborg brake in a wind turbine. Brake torque is determined by friction coefficient and clamp force; the latter brake is one1 of the two independent brake systems in a wind turbine. As a consequence of the gearing

  14. 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

  15. Throttle And Brake Control Systems For Automatic Vehicle Following

    E-Print Network [OSTI]

    Ioannou, P.; Xu, Z.

    1994-01-01T23:59:59.000Z

    and Brake Control Systems for Automatic Vehicle Following P.and Brake Control Systems for Automatic Vehicle Following *Transit Systems, Proceedings of 1977 Joint Automatic Control

  16. Regenerative Medicine: Learning from Past Examples

    E-Print Network [OSTI]

    Couto, Daniela S.

    Regenerative medicine products have characteristically shown great therapeutic potential, but limited market success. Learning from the past attempts at capturing value is critical for new and emerging regenerative medicine ...

  17. Prioritizing Climate Change Mitigation Alternatives: Comparing Transportation Technologies to Options in Other Sectors

    E-Print Network [OSTI]

    Lutsey, Nicholas P.

    2008-01-01T23:59:59.000Z

    crops Full HEV (regenerative braking, battery-electricidle-off and limited regenerative braking Closing/covering

  18. Identifying Options for Deep Reductions in Greenhouse Gas Emissions from California Transportation: Meeting an 80% Reduction Goal in 2050

    E-Print Network [OSTI]

    Yang, Christopher; McCollum, David L; McCarthy, Ryan; Leighty, Wayne

    2008-01-01T23:59:59.000Z

    under low loads, and regenerative braking. Application ofthe entire fleet). Regenerative braking can improve energy

  19. Brake Defect Causation and Abatement Study (BDCAS)

    E-Print Network [OSTI]

    on various lining materials for comparison study #12;Center for Transportation Analysis 2360 CherahalaBrake Defect Causation and Abatement Study (BDCAS) Oak Ridge National Laboratory managed by UT Based Brake Testers (PBBTs) part of the out-of- service criterion for commercial motor vehicles in 2007

  20. TMV Technology Capabilities Brake Stroke Monitor

    E-Print Network [OSTI]

    TMV Technology Capabilities Brake Stroke Monitor Brake monitoring systems are proactive maintenance This technology allows for CMV operators to have knowledge of their steer, drive, and tandem axle group weights setup is required. Current Safety/Enforcement Technologies EOBR (electronic on-board recorder) On

  1. Contactless magnetic brake for automotive applications

    E-Print Network [OSTI]

    Gay, Sebastien Emmanuel

    2009-05-15T23:59:59.000Z

    consumption due to power assistance, and requirement for anti-lock controls. To solve these problems, a contactless magnetic brake has been developed. This concept includes a novel flux-shunting structure to control the excitation flux generated by permanent...

  2. An engine air-brake integration study

    E-Print Network [OSTI]

    Mulchandani, Hiten

    2011-01-01T23:59:59.000Z

    The feasibility of operating an engine air-brake (EAB) integrated with a pylon duct bifurcation in a realistic aircraft engine environment has been analyzed. The EAB uses variable exit guide vanes downstream of a high ...

  3. Method and apparatus for wind turbine braking

    DOE Patents [OSTI]

    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

    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.

  4. Constraining the Braking Indices of Magnetars

    E-Print Network [OSTI]

    Gao, Z F; Wang, N; Yuan, J P; Peng, Q H; Du, Y J

    2015-01-01T23:59:59.000Z

    Due to the lack of long term pulsed emission in quiescence and the strong timing noise, it is impossible to directly measure the braking index $n$ of a magnetar. Based on the estimated ages of their potentially associated supernova remnants (SNRs), we estimate the values of $n$ of nine magnetars with SNRs, and find that they cluster in a range of $1\\sim$41. Six magnetars have smaller braking indices of $13$ for other three magnetars are attributed to the decay of external braking torque, which might be caused by magnetic field decay. We estimate the possible wind luminosities for the magnetars with $13$ within the updated magneto-thermal evolution models. We point out that there could be some connections between the magnetar's anti-glitch event and its braking index, and the magnitude of $n$ should be taken into account when explaining the event. Although the constrained range of the magnetars' braking indices is tentative, our method provides an effective way to constrain the magnetars' braking indices if th...

  5. Regenerative Fuel Cells for Energy Storage

    Broader source: Energy.gov (indexed) [DOE]

    at Giner 2. Regenerative Systems for Energy Storage 1. Economics 2. Electrolyzer Optimization 3. Fuel Cell Optimization 4. What to do with O 2 ? 5. High Pressure Electrolysis...

  6. Advanced regenerative absorption refrigeration cycles

    DOE Patents [OSTI]

    Dao, Kim (14 Nace Ave., Piedmont, CA 94611)

    1990-01-01T23:59:59.000Z

    Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).

  7. Regen SW | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form History Facebook iconQuito,JumpReactionEnergyRedwoodRefgas JumpRegen SW

  8. A diagnostic system for air brakes in commercial vehicles 

    E-Print Network [OSTI]

    Coimbatore Subramanian, Shankar Ram

    2007-09-17T23:59:59.000Z

    This dissertation deals with the development of a model-based diagnostic system for air brake systems that are widely used in commercial vehicles, such as trucks, tractor-trailers, buses, etc. The performance of these brake ...

  9. Climate and Transportation Solutions: Findings from the 2009 Asilomar Conference on Transportation and Energy Policy

    E-Print Network [OSTI]

    Sperling, Daniel; Cannon, James S.

    2010-01-01T23:59:59.000Z

    ef?ciency through regenerative braking. The development of aincluding start/stop with regenerative braking, combustioneffects of regenerative braking. Since the acceleration term

  10. Quantifying the benefits of hybrid vehicles

    E-Print Network [OSTI]

    Turrentine, Tom; Delucchi, Mark; Heffner, Reid R.; Kurani, Kenneth S; Sun, Yongling

    2006-01-01T23:59:59.000Z

    coasting through regenerative braking. Second, by downsizingrecharge the battery. Regenerative braking and coasting Onehybrid that uses regenerative braking and some electric

  11. The Rise of Electric Two-wheelers in China: Factors for their Success and Implications for the Future

    E-Print Network [OSTI]

    Weinert, Jonathan X.

    2007-01-01T23:59:59.000Z

    management system. Regenerative braking too many products,60V battery systems and regenerative braking. Two companiessell E2Ws with regenerative braking systems. Innovation in

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

    E-Print Network [OSTI]

    Zhao, Hengbing; Burke, Andy

    2010-01-01T23:59:59.000Z

    the capture of regenerative braking energy, which willand frequent capture of regenerative braking energy, thethe stack and the regenerative braking energy and provide a

  13. ELECTROCHEMICAL POWER FOR TRANSPORTATION

    E-Print Network [OSTI]

    Cairns, Elton J.

    2012-01-01T23:59:59.000Z

    Improvement from Regenerative Braking on the Copper Electriccomponents. The use of regenerative braking can also have aeasier to add regenerative braking capability, particularly

  14. Transportation and its Infrastructure

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    electrical energy if regenerative braking is available (seerecharged only by regenerative braking and engine charging,systems, store regenerative braking energy and to operate

  15. Optimum Performance of Direct Hydrogen Hybrid Fuel Cell Vehicles

    E-Print Network [OSTI]

    Zhao, Hengbing; Burke, Andy

    2009-01-01T23:59:59.000Z

    decelerating through regenerative braking. In the hybridvehicle through regenerative braking. The remaining energya narrow range, such that regenerative braking energy can be

  16. High power regenerative laser amplifier

    DOE Patents [OSTI]

    Miller, John L. (Livermore, CA); Hackel, Lloyd A. (Livermore, CA); Dane, Clifford B. (Dublin, CA); Zapata, Luis E. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    A regenerative amplifier design capable of operating at high energy per pulse, for instance, from 20-100 Joules, at moderate repetition rates, for instance from 5-20 Hertz is provided. The laser amplifier comprises a gain medium and source of pump energy coupled with the gain medium; a Pockels cell, which rotates an incident beam in response to application of a control signal; an optical relay system defining a first relay plane near the gain medium and a second relay plane near the rotator; and a plurality of reflectors configured to define an optical path through the gain medium, optical relay and Pockels cell, such that each transit of the optical path includes at least one pass through the gain medium and only one pass through the Pockels cell. An input coupler, and an output coupler are provided, implemented by a single polarizer. A control circuit coupled to the Pockels cell generates the control signal in timed relationship with the input pulse so that the input pulse is captured by the input coupler and proceeds through at least one transit of the optical path, and then the control signal is applied to cause rotation of the pulse to a polarization reflected by the polarizer, after which the captured pulse passes through the gain medium at least once more and is reflected out of the optical path by the polarizer before passing through the rotator again to provide an amplified pulse.

  17. High power regenerative laser amplifier

    DOE Patents [OSTI]

    Miller, J.L.; Hackel, L.A.; Dane, C.B.; Zapata, L.E.

    1994-02-08T23:59:59.000Z

    A regenerative amplifier design capable of operating at high energy per pulse, for instance, from 20-100 Joules, at moderate repetition rates, for instance from 5-20 Hertz is provided. The laser amplifier comprises a gain medium and source of pump energy coupled with the gain medium; a Pockels cell, which rotates an incident beam in response to application of a control signal; an optical relay system defining a first relay plane near the gain medium and a second relay plane near the rotator; and a plurality of reflectors configured to define an optical path through the gain medium, optical relay and Pockels cell, such that each transit of the optical path includes at least one pass through the gain medium and only one pass through the Pockels cell. An input coupler, and an output coupler are provided, implemented by a single polarizer. A control circuit coupled to the Pockels cell generates the control signal in timed relationship with the input pulse so that the input pulse is captured by the input coupler and proceeds through at least one transit of the optical path, and then the control signal is applied to cause rotation of the pulse to a polarization reflected by the polarizer, after which the captured pulse passes through the gain medium at least once more and is reflected out of the optical path by the polarizer before passing through the rotator again to provide an amplified pulse. 7 figures.

  18. The effect of friction on drum brakes

    SciTech Connect (OSTI)

    Huang, Y.M.; Shyr, J.S. [National Taiwan Univ. (China)

    1995-12-31T23:59:59.000Z

    The boundary element method (BEM) has been developed for a long period of time. Cruse and Wilson developed an isoparametric quadratic element. Rizzo, Cruse, Rizzo and Shippy, and Swedlow and cruse applied the method to various problems. It shows that the BEM can provide a very good analytical result in the linear problem and it can reduce time in preparation of numerical data. Watson and Newcomb pointed out that the pressure distribution on the contact surface of the brake drum and the lining plate do not vary significantly along the axis. The deflection can be reduced by an appropriate design of the web; therefore, two dimensional analysis with the BEM is used in this analysis. Based on the authors` knowledge, this is the first paper to analyze the drum brake by using the BEM. The assumptions are the brake drum to be a rigid body, perfect interface contact between the drum and the shoe, the constant friction coefficient of the friction material and the thermal effect to be neglected. The two dimensional equations are derived based on the Somigliana`s identity. Since there is no shape function and no need of the Jacobin for the coordinate transform, to integrate numerically is easier and to write a computer code is simpler for the constant value element than the second order element. The linear element is inappropriate to treat the comer problem. Using the linear elements or second order elements creates discontinuous phenomena along the irregular boundary. The common nodal point has different normal vector and boundary conditions. It is necessary to have an extra equation to provide a unique solution for the final linear equation. Using the constant value element can get rid of this problem. The effect of the friction on the pressure distribution at the friction interface is studied. The calculated results of the pressure distribution are compared with the available data. The mathematical model can be used as a design tool to predict the performance of drum brakes.

  19. A diagnostic system for air brakes in commercial vehicles

    E-Print Network [OSTI]

    Coimbatore Subramanian, Shankar Ram

    2007-09-17T23:59:59.000Z

    ]. It is appropriate to point out that, in an appraisal of the future needs of the trucking industry [16], the authors, who represent a broad spectrum of the trucking industry, call for the development of improved methods of brake inspections. 6 B. Objectives... States railway industry, air brake systems were initially introduced during the nineteenth century. Before the introduction of the air brake system, railway cars were retarded mainly by mechanical means (for example, by levers, chains and other linkages...

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

    E-Print Network [OSTI]

    Maciua, Dragos

    1996-01-01T23:59:59.000Z

    Design, Modeling and Control of Steering and Braking for anDesign, Modeling and Control of Steering and Braking for anDesign, Modeling and Control of Steering and Braking for an

  1. Measurement and control of brake pedal feel quality in automobile manufacturing

    E-Print Network [OSTI]

    Cerilles, Jeffrey T. (Jeffrey Thomas)

    2005-01-01T23:59:59.000Z

    Customer perception of brake pedal feel quality, as related to the perception of the brake pedal feeling soft or mushy, depends on both the customer's subjective judgment of quality and the actual build quality of the brake ...

  2. Therapeutic potential of nanoceria in regenerative medicine.

    SciTech Connect (OSTI)

    Das, Soumen; Chigurupati, Srinivasulu; Dowding, Janet; Munusamy, Prabhakaran; Baer, Donald R.; McGinnis, James F.; Mattson, Mark P.; Self, William; Seal, Sudipta

    2014-11-14T23:59:59.000Z

    Tissue engineering and regenerative medicine aim to achieve functional restoration of tissue or cells damaged through disease, aging or trauma. Advancement of tissue engineering requires innovation in the field of 3D scaffolding, and functionalization with bioactive molecules. Nanotechnology offers advanced materials with patterned nano-morphologies for cell growth and different molecular substrates which can support cell survival and functions. Cerium oxide nanoparticles (nanoceria) can control intracellular as well as extracellular reactive oxygen and nitrogen species. Recent findings suggest that nanoceria can enhance long-term cell survival, enable cell migration and proliferation, and promote stem cell differentiation. Moreover, the self-regenerative property of nanoceria permits a small dose to remain catalytically active for extended time. This review summarizes the possibilities and applications of nanoceria in the field of tissue engineering and regenerative medicine.

  3. Pneumatic brake control for precision stopping of heavy-duty vehicles

    E-Print Network [OSTI]

    Bu, Fanping; Tan, Han-Shue

    2007-01-01T23:59:59.000Z

    desirable that the automatic brake control system uses thesystems,” IEEE Transactions on Automatic Control, vol. 41,enables automatic control of the pneumatic brake system and

  4. Ultracapacitor Technologies and Application in Hybrid and Electric Vehicles

    E-Print Network [OSTI]

    Burke, Andy

    2009-01-01T23:59:59.000Z

    recharged during regenerative braking. With these two modes,energy during regenerative braking. In the Honda system, the

  5. Batteries for Plug-in Hybrid Electric Vehicles (PHEVs): Goals and the State of Technology circa 2008

    E-Print Network [OSTI]

    Axsen, Jonn; Burke, Andy; Kurani, Kenneth S

    2008-01-01T23:59:59.000Z

    generator or from regenerative braking and uses the energya generator and from regenerative braking, and passes energy

  6. Driving Plug-In Hybrid Electric Vehicles: Reports from U.S. Drivers of HEVs converted to PHEVs, circa 2006-07

    E-Print Network [OSTI]

    Kurani, Kenneth S; Heffner, Reid R.; Turrentine, Tom

    2008-01-01T23:59:59.000Z

    energy through regenerative braking. In contrast, PHEVs canfrom a stop, and regenerative braking—signaled to HEV owners

  7. Pulsar Braking Index and Mass Accretion

    E-Print Network [OSTI]

    P. D. Morley

    1993-11-15T23:59:59.000Z

    I show that the braking index, $N$, a fundamental pulsar experimental quantity, naturally differs from the canonical value of 3 by terms which involve mass accretion. Using the measured values of $N$ for PSR1509-58 and PSR0531+21, I determine that for constant density neutron stars their present mass accretion rates are $(3.10\\pm.51)\\times10^{-5}$ M year$^{-1}$ and $(9.946\\pm.089)\\times10^{-5}$ M year$^{-1}$ respectively, where M is the mass of each pulsar. Finally, I demonstrate that mass accretion removes the outstanding problem of the origin of the big glitches of the Vela Pulsar.

  8. Do Si stars undergo any magnetic braking?

    E-Print Network [OSTI]

    P. North

    1998-02-23T23:59:59.000Z

    The old question of rotational braking of Ap Si stars is revisited on the empirical side, taking advantage of the recent Hipparcos results. Field stars with various evolutionary states are considered, and it is shown that the loose correlation between their rotational period and their surface gravity is entirely compatible with conservation of angular momentum. No evidence is found for any loss of angular momentum on the Main Sequence, which confirms earlier results based on less reliable estimates of surface gravity. The importance of reliable, fundamental Teff determinations of Bp and Ap stars is emphasized.

  9. Development of Diagnostic Algorithms for Air Brakes in Trucks

    E-Print Network [OSTI]

    Dhar, Sandeep

    2011-10-21T23:59:59.000Z

    causes a reduction in the steady-state pressure in the brake chamber and an increase in the lag of the braking pressure response thereby increasing the stopping distance of the vehicle. Currently a presence of leak in the system is detected...

  10. Braking system for use with an arbor of a microscope

    DOE Patents [OSTI]

    Norgren, Duane U. (Orinda, CA)

    1984-01-01T23:59:59.000Z

    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.

  11. An improved theory for regenerative pump performance

    E-Print Network [OSTI]

    Kim, Yong Jung

    , impeller angles, CFD 1 INTRODUCTION Regenerative flow pumps and compressors have found many applications displa- cement machines such as root blowers, but without problems of lubrication and wear. In addition flow pump/compressor (RFP and RFC) is applied as a gas compressor there is a further advantage

  12. Inventory processes: Quasi-regenerative property,

    E-Print Network [OSTI]

    Pflug, Georg

    Inventory processes: Quasi-regenerative property, performance evaluation and sensitivity estimation-time, multiperiod (s, S)- policy inventory model with backlog. The cost function may contain holding, shortage, and fixed ordering costs. Holding and shortage costs may be nonlinear. We show that the resulting inventory

  13. April 2011 1 Regenerative Fuel Cells

    E-Print Network [OSTI]

    . Economics 2. Electrolyzer Optimization 3. Fuel Cell Optimization 4. What to do with O2? 5. High Pressure Storage 1. Economics 2. Electrolyzer Optimization 3. Fuel Cell Optimization 4. What to do with O2? 5. HighApril 2011 1 Regenerative Fuel Cells for Energy Storage April 2011 Corky Mittelsteadt #12;April

  14. New Phase-coherent Measurements of Pulsar Braking Indices

    E-Print Network [OSTI]

    Margaret A. Livingstone; Victoria M. Kaspi; Fotis P. Gavriil; Richard N. Manchester; E. V. Gotthelf; Lucien Kuiper

    2007-02-07T23:59:59.000Z

    Pulsar braking indices offer insight into the physics that underlies pulsar spin-down. Only five braking indices have been measured via phase-coherent timing; all measured values are less than 3, the value expected from magnetic dipole radiation. Here we present new measurements for three of the five pulsar braking indices, obtained with phase-coherent timing for PSRs J1846-0258 (n=2.65+/-0.01), B1509-58 (n=2.839+/-0.001) and B0540-69 (n=2.140+/-0.009). We discuss the implications of these results and possible physical explanations for them.

  15. Low-temperature thermally regenerative electrochemical system

    DOE Patents [OSTI]

    Loutfy, R.O.; Brown, A.P.; Yao, N.P.

    1982-04-21T23:59:59.000Z

    A thermally regenerative electrochemical system is described including an electrochemical cell with two water-based electrolytes separated by an ion exchange membrane, at least one of the electrolytes containing a complexing agent and a salt of a multivalent metal whose respective order of potentials for a pair of its redox couples is reversible by a change in the amount of the ocmplexing agent in the electrolyte, the complexing agent being removable by distillation to cause the reversal.

  16. Low temperature thermally regenerative electrochemical system

    DOE Patents [OSTI]

    Loutfy, Raouf O. (Tucson, AZ); Brown, Alan P. (Bolingbrook, IL); Yao, Neng-Ping (Clarendon Hills, IL)

    1983-01-01T23:59:59.000Z

    A thermally regenerative electrochemical system including an electrochemical cell with two water-based electrolytes separated by an ion exchange membrane, at least one of the electrolytes containing a complexing agent and a salt of a multivalent metal whose respective order of potentials for a pair of its redox couples is reversible by a change in the amount of the complexing agent in the electrolyte, the complexing agent being removable by distillation to cause the reversal.

  17. A solar regenerative thermoelectrochemical converter (RTEC)

    SciTech Connect (OSTI)

    Townsend, C.W.; McHardy, J. (Hughes Aircraft Co., El Segundo, CA (United States))

    1992-02-01T23:59:59.000Z

    This is an executive summary of a final subcontract report that describes the successful completion of a closed-loop demonstration of a regenerative thermoelectromechanical device using solar heat input for the production of electricity. The full report, which contains a detailed description of the two-year effort, is currently subject to a government secrecy order which precludes public release of the information. Copies of the full report will be made available for general release whenever the secrecy order is lifted.

  18. automotive drum brakes: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    well-known phenomena of acoustics of friction as the squealing disc brake and the singing wine glass. Oleg N. Kirillov 2007-08-07 130 The Ultra-High Energy Cosmic Ray Spectrum...

  19. Adaptive Rollover Prevention for Automotive Vehicles with Differential Braking

    E-Print Network [OSTI]

    Duffy, Ken

    Adaptive Rollover Prevention for Automotive Vehicles with Differential Braking Selim Solmaz, switching, and tuning (MMST) paradigm [13, 14, 15] for preventing un­tripped rollover in automotive vehicles performance than its fixed robust counterpart. Keywords: Automotive control; Multiple models; Parameter

  20. Investigation of aerodynamic braking devices for wind turbine applications

    SciTech Connect (OSTI)

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

    1997-04-01T23:59:59.000Z

    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.

  1. Asbestos-free brake-lining materials for hydrogenerators

    SciTech Connect (OSTI)

    Lalonde, S.; Lanteigne, J. [Hydro-Quebec, Varennes, Quebec (Canada)

    1995-11-01T23:59:59.000Z

    Three different asbestos-free materials currently considered as new lining materials for hydrogenerator brakes were tested and compared to the original asbestos lining. Results show that these substitutes not only vary greatly from the original material in terms of mechanical properties and physical characteristics but also exhibit significantly different performances in braking tests. Consequently, these new materials are not entirely suitable for the intended application.

  2. The Impact of Biomechanics in Tissue Engineering and Regenerative Medicine

    E-Print Network [OSTI]

    Butler, David L.

    Biomechanical factors profoundly influence the processes of tissue growth, development, maintenance, degeneration, and repair. Regenerative strategies to restore damaged or diseased tissues in vivo and create living tissue ...

  3. Nonlinear dynamics of a regenerative cutting process

    E-Print Network [OSTI]

    Grzegorz Litak; Sven Schubert; Guenter Radons

    2012-01-24T23:59:59.000Z

    We examine the regenerative cutting process by using a single degree of freedom non-smooth model with a friction component and a time delay term. Instead of the standard Lyapunov exponent calculations, we propose a statistical 0-1 test analysis for chaos detection. This approach reveals the nature of the cutting process signaling regular or chaotic dynamics. For the investigated deterministic model we are able to show a transition from chaotic to regular motion with increasing cutting speed. For two values of time delay showing the different response the results have been confirmed by the means of the spectral density and the multiscaled entropy.

  4. Magnetic braking of T Tauri stars

    E-Print Network [OSTI]

    P. J. Armitage; C. J. Clarke

    1995-12-05T23:59:59.000Z

    We construct models for the rotation rates of T Tauri stars whose spin is regulated by magnetic linkage between the star and a surrounding accretion disc. Our models utilise a time-dependent disc code to follow the accretion process and include the effects of pre-main-sequence stellar evolution. We find that the initial disc mass controls the evolution of the star-disc system. For sufficiently massive discs, a stellar field of $\\sim$ 1 kG is able to regulate the spin rate to the observed values during the classical T Tauri phase. The field then acts to expel the disc and the star spins up at constant angular momentum as a weak-line system. Lower mass discs are ejected at an early epoch and fail to brake the star significantly. We extend the model to close binary systems, and find that the removal of angular momentum from the disc by the secondary significantly prolongs the inner disc lifetime. Such systems should therefore be relatively slow rotators. We also discuss the implications of our model for the spectral energy distributions and variability of T Tauri stars.

  5. Multiple excitation regenerative amplifier inertial confinement system

    DOE Patents [OSTI]

    George, Victor E. [Livermore, CA; Haas, Roger A. [Pleasanton, CA; Krupke, William F. [Pleasanton, CA; Schlitt, Leland G. [Livermore, CA

    1980-05-27T23:59:59.000Z

    The invention relates to apparatus and methods for producing high intensity laser radiation generation which is achieved through an optical amplifier-storage ring design. One or two synchronized, counterpropagating laser pulses are injected into a regenerative amplifier cavity and amplified by gain media which are pumped repetitively by electrical or optical means. The gain media excitation pulses are tailored to efficiently amplify the laser pulses during each transit. After the laser pulses have been amplified to the desired intensity level, they are either switched out of the cavity by some switch means, as for example an electro-optical device, for any well known laser end uses, or a target means may be injected into the regenerative amplifier cavity in such a way as to intercept simultaneously the counterpropagating laser pulses. One such well known end uses to which this invention is intended is for production of high density and temperature plasmas suitable for generating neutrons, ions and x-rays and for studying matter heated by high intensity laser radiation.

  6. How to play a disc brake

    E-Print Network [OSTI]

    Oleg N. Kirillov

    2007-08-22T23:59:59.000Z

    We consider a gyroscopic system under the action of small dissipative and non-conservative positional forces, which has its origin in the models of rotating bodies of revolution being in frictional contact. The spectrum of the unperturbed gyroscopic system forms a "spectral mesh" in the plane "frequency -gyroscopic parameter" with double semi-simple purely imaginary eigenvalues at zero value of the gyroscopic parameter. It is shown that dissipative forces lead to the splitting of the semi-simple eigenvalue with the creation of the so-called "bubble of instability" - a ring in the three-dimensional space of the gyroscopic parameter and real and imaginary parts of eigenvalues, which corresponds to complex eigenvalues. In case of full dissipation with a positive-definite damping matrix the eigenvalues of the ring have negative real parts making the bubble a latent source of instability because it can "emerge" to the region of eigenvalues with positive real parts due to action of both indefinite damping and non-conservative positional forces. In the paper, the instability mechanism is analytically described with the use of the perturbation theory of multiple eigenvalues. As an example stability of a rotating circular string constrained by a stationary load system is studied in detail. The theory developed seems to give a first clear explanation of the mechanism of self-excited vibrations in the rotating structures in frictional contact, that is responsible for such well-known phenomena of acoustics of friction as the squealing disc brake and the singing wine glass.

  7. Control Engineering Practice 11 (2003) 163170 A mechatronic conception of a new intelligent braking system

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , residual friction, noise, vibrations, a new brake has been designed according to a modular principle which describes a new intelligent braking system for motor vehicles. A mechatronic approach helped to avoid some

  8. Evaluation of driver braking performance to an unexpected object in the roadway 

    E-Print Network [OSTI]

    Picha, Dale Louis

    1994-01-01T23:59:59.000Z

    components, specifically whether the equation accurately reflects driver and vehicle behaviors during a braking maneuver. This research evaluated the two components of the SSD equation. Four field studies were conducted that evaluated driver braking...

  9. Evaluation of driver braking performance to an unexpected object in the roadway

    E-Print Network [OSTI]

    Picha, Dale Louis

    1994-01-01T23:59:59.000Z

    components, specifically whether the equation accurately reflects driver and vehicle behaviors during a braking maneuver. This research evaluated the two components of the SSD equation. Four field studies were conducted that evaluated driver braking...

  10. Evaluation of Corrosion Failure in Tractor-Trailer Brake System

    SciTech Connect (OSTI)

    Wilson, DF

    2002-10-22T23:59:59.000Z

    As reported to ORNL, concomitant with the introduction of different deicing and anti-icing compounds, there was an increase in the brake failure rate of tractor-trailer trucks. A forensic evaluation of a failed brake system was performed. Optical and scanning electron microscopic evaluation showed corrosion to be mostly confined to the brake table/lining interface. The corrosion is non-uniform as is to be expected for plain carbon steel in chloride environments. This initial analysis found no evidence for the chlorides of calcium and magnesium, which are the newly introduced deicing and antiicing compounds and are less soluble in water than the identified chlorides of sodium and potassium, in the scale. The result could be as a result of non-exposure of the examined brake table to calcium and magnesium chloride. The mechanisms for the increased failure rate are postulated as being an increased rate of corrosion due to positive shifts in the corrosion potential, and an increased amount of corrosion due to an increased ''time of wetness'' that results from the presence of hygroscopic salts. Laboratory scale evaluation of the corrosion of plain carbon steel in simulated deicing and anti-icing solutions need to be performed to determine corrosion rates and morphological development of corrosion product, to compare laboratory data to in-service data, and to rank economically feasible replacement materials for low carbon steel. In addition, the mechanical behavior of the lining attached to the brake shoe table needs to be assessed. It is opined that an appropriate adjustment of materials could easily allow for a doubling of a brake table/lining lifetime. Suggestions for additional work, to clarify the mechanisms of rust jacking and to develop possible solutions, are described.

  11. Calibration, Information, and Control Strategies for Braking to Avoid a Collision

    E-Print Network [OSTI]

    effect. A new model is introduced according to which braking is controlled by keeping the perceived idealCalibration, Information, and Control Strategies for Braking to Avoid a Collision Brett R. Fajen Rensselaer Polytechnic Institute This study explored visual control strategies for braking to avoid collision

  12. Airbus A320 Braking as Predicate-Action Peter B. Ladkin

    E-Print Network [OSTI]

    Ladkin, Peter B.

    Airbus A320 Braking as Predicate-Action Diagrams Peter B. Ladkin Universit¨at Bielefeld, Technische of the Airbus A320 braking systems contained in the Flight Crew Operating Manual. This helps identify to interest us and others in the design of the A320 braking system [FI.93a, FI.93b, FI.93c]. This paper

  13. A Regenerative High-Rise Tower in Shreveport, Louisiana 

    E-Print Network [OSTI]

    Garrison, M.

    2010-01-01T23:59:59.000Z

    Zero Net Energy Buildings are increasingly being designed and constructed in response to the demand for sustainable buildings. But, we must now go beyond merely sustaining our environment for future generations we must provide regenerative designs...

  14. A Regenerative High-Rise Tower in Shreveport, Louisiana

    E-Print Network [OSTI]

    Garrison, M.

    Zero Net Energy Buildings are increasingly being designed and constructed in response to the demand for sustainable buildings. But, we must now go beyond merely sustaining our environment for future generations we must provide regenerative designs...

  15. Oxygen-Diffused Titanium as a Candidate Brake Rotor Material

    SciTech Connect (OSTI)

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

    2009-01-01T23:59:59.000Z

    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.

  16. automotive brake materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    brake materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Multidisciplinary design optimization...

  17. aircraft brake materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    brake materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 26 REDUCTION OF CADMTUM PLATING ON...

  18. Brake Wear and Performance Test Final December 2009

    E-Print Network [OSTI]

    Brake Wear and Performance Test Final Report December 2009 #12;FOREWORD This study focuses on using with assisting the State of Tennessee in identifying suitable PBBT machines, procuring a PBBT machine, installing the PBBT machine to be used in this research, and training Tennessee Department of Safety (TDOS) Staff

  19. Many applications require brakes, for instance to decelerate or to

    E-Print Network [OSTI]

    an error occurs in the process of a robotic arm. The energy consumption and actuation force of these brakes is very high. A team of TU Delft scientists developed a method to reduce the energy consumption. The energy consumption is high because an actuator has to generate a normal force between two friction

  20. Braking index of isolated pulsars: open questions and ways forward

    E-Print Network [OSTI]

    Hamil, Oliver

    2015-01-01T23:59:59.000Z

    Isolated pulsars are rotating neutron stars with accurately measured angular velocities $\\Omega$, and their time derivatives which show unambiguously that the pulsars are slowing down. Although the exact mechanism of the spin-down is a question of debate, the commonly accepted view is that it arises either through emission of magnetic dipole radiation (MDR) from a rotating magnetized body, through emission of a relativistic particle wind, or via higher order magnetic multipole or gravitational quadrupole radiation. The calculated energy loss by a rotating pulsar is model dependent and leads to the power law $\\dot{\\Omega}$ = -K $\\Omega^{\\rm n}$ where $n$ is called the braking index. The theoretical value for braking index is $n = 1, 3, 5$ for wind, MDR, quadrupole radiation respectively. The accepted view is that pulsar braking is strongly dominated by MDR. Highly precise observations of isolated pulsars yield braking index values in the range $1 < n < 2.8$ which are consistently less than the value pred...

  1. TOWARDS GLOBAL CHASSIS CONTROL BY INTEGRATING THE BRAKE AND

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Szab´o*, J. Bokor*, C. Poussot-Vassal**, O. Sename**, L. Dugard** *Computer and Automation Research active suspensions and an active brake is proposed to improve the safety of vehicles. The design is based of the method is demonstrated through a complex simulation example containing vehicle maneuvers. Keywords: LPV

  2. New Regenerative Cycle for Vapor Compression Refrigeration

    SciTech Connect (OSTI)

    Mark J. Bergander

    2005-08-29T23:59:59.000Z

    The main objective of this project is to confirm on a well-instrumented prototype the theoretically derived claims of higher efficiency and coefficient of performance for geothermal heat pumps based on a new regenerative thermodynamic cycle as comparing to existing technology. In order to demonstrate the improved performance of the prototype, it will be compared to published parameters of commercially available geothermal heat pumps manufactured by US and foreign companies. Other objectives are to optimize the design parameters and to determine the economic viability of the new technology. Background (as stated in the proposal): The proposed technology closely relates to EERE mission by improving energy efficiency, bringing clean, reliable and affordable heating and cooling to the residential and commercial buildings and reducing greenhouse gases emission. It can provide the same amount of heating and cooling with considerably less use of electrical energy and consequently has a potential of reducing our nations dependence on foreign oil. The theoretical basis for the proposed thermodynamic cycle was previously developed and was originally called a dynamic equilibrium method. This theory considers the dynamic equations of state of the working fluid and proposes the methods for modification of T-S trajectories of adiabatic transformation by changing dynamic properties of gas, such as flow rate, speed and acceleration. The substance of this proposal is a thermodynamic cycle characterized by the regenerative use of the potential energy of two-phase flow expansion, which in traditional systems is lost in expansion valves. The essential new features of the process are: (1) The application of two-step throttling of the working fluid and two-step compression of its vapor phase. (2) Use of a compressor as the initial step compression and a jet device as a second step, where throttling and compression are combined. (3) Controlled ratio of a working fluid at the first and second step of compression. In the proposed system, the compressor compresses the vapor only to 50-60% of the final pressure, while the additional compression is provided by a jet device using internal potential energy of the working fluid flow. Therefore, the amount of mechanical energy required by a compressor is significantly reduced, resulting in the increase of efficiency (either COP or EER). The novelty of the cycle is in the equipment and in the way the multi-staging is accomplished. The anticipated result will be a new refrigeration system that requires less energy to accomplish a cooling task. The application of this technology will be for more efficient designs of: (1) Industrial chillers, (2) Refrigeration plants, (3) Heat pumps, (4) Gas Liquefaction plants, (5) Cryogenic systems.

  3. High power, high beam quality regenerative amplifier

    DOE Patents [OSTI]

    Hackel, Lloyd A. (Livermore, CA); Dane, Clifford B. (Livermore, CA)

    1993-01-01T23:59:59.000Z

    A regenerative laser amplifier system generates high peak power and high energy per pulse output beams enabling generation of X-rays used in X-ray lithography for manufacturing integrated circuits. The laser amplifier includes a ring shaped optical path with a limited number of components including a polarizer, a passive 90 degree phase rotator, a plurality of mirrors, a relay telescope, and a gain medium, the components being placed close to the image plane of the relay telescope to reduce diffraction or phase perturbations in order to limit high peak intensity spiking. In the ring, the beam makes two passes through the gain medium for each transit of the optical path to increase the amplifier gain to loss ratio. A beam input into the ring makes two passes around the ring, is diverted into an SBS phase conjugator and proceeds out of the SBS phase conjugator back through the ring in an equal but opposite direction for two passes, further reducing phase perturbations. A master oscillator inputs the beam through an isolation cell (Faraday or Pockels) which transmits the beam into the ring without polarization rotation. The isolation cell rotates polarization only in beams proceeding out of the ring to direct the beams out of the amplifier. The diffraction limited quality of the input beam is preserved in the amplifier so that a high power output beam having nearly the same diffraction limited quality is produced.

  4. High power, high beam quality regenerative amplifier

    DOE Patents [OSTI]

    Hackel, L.A.; Dane, C.B.

    1993-08-24T23:59:59.000Z

    A regenerative laser amplifier system generates high peak power and high energy per pulse output beams enabling generation of X-rays used in X-ray lithography for manufacturing integrated circuits. The laser amplifier includes a ring shaped optical path with a limited number of components including a polarizer, a passive 90 degree phase rotator, a plurality of mirrors, a relay telescope, and a gain medium, the components being placed close to the image plane of the relay telescope to reduce diffraction or phase perturbations in order to limit high peak intensity spiking. In the ring, the beam makes two passes through the gain medium for each transit of the optical path to increase the amplifier gain to loss ratio. A beam input into the ring makes two passes around the ring, is diverted into an SBS phase conjugator and proceeds out of the SBS phase conjugator back through the ring in an equal but opposite direction for two passes, further reducing phase perturbations. A master oscillator inputs the beam through an isolation cell (Faraday or Pockels) which transmits the beam into the ring without polarization rotation. The isolation cell rotates polarization only in beams proceeding out of the ring to direct the beams out of the amplifier. The diffraction limited quality of the input beam is preserved in the amplifier so that a high power output beam having nearly the same diffraction limited quality is produced.

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

    SciTech Connect (OSTI)

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

    2013-10-01T23:59:59.000Z

    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.

  6. Development of Diagnostic Algorithms for Air Brakes in Trucks 

    E-Print Network [OSTI]

    Dhar, Sandeep

    2011-10-21T23:59:59.000Z

    and the rear brake chamber using the predicted primary circuit pressure : : : : : : : : : : : : : : : : : : : : 54 33 Simulated response of the hybrid system : : : : : : : : : : : : : : : : 64 34 Steady-state estimate of z1 of the pneumatic hybrid system... with massless piston : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 67 xii FIGURE Page 35 Steady-state estimates of z1 and z2 of the pneumatic hybrid system : 70 36 (a) Mechanical hybrid system, (b) non-hybrid counterpart : : : : : : 70 37...

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

    SciTech Connect (OSTI)

    Peter J. Blau

    2000-04-26T23:59:59.000Z

    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.

  8. A mathematical model for air brake systems in the presence of leaks

    E-Print Network [OSTI]

    Ramaratham, Srivatsan

    2008-10-10T23:59:59.000Z

    of the pneumatic subsystem. . . . . . . . . . . . . . . . . . 20 16 Pressure transients at 722 kPa (90 psi) supply pressure with no leak. 22 17 Schematic of the setup for leak corroboration tests. . . . . . . . . . . 27 18 Comparison of measured and predicted mass... of detecting and locating leaks[6]. Most of the performance tests and visual based inspection tests of the air brake system indirectly correlate pressure in the brake chamber with the torque output, brake pad temperature, push rod strokes etc[7], [8]. More...

  9. Real-Time Dynamic Brake Assessment Proof of Concept Final Report

    SciTech Connect (OSTI)

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

    2011-11-01T23:59:59.000Z

    This proof-of-concept research was performed to explore the feasibility of using real-world braking data from commercial motor vehicles to make a diagnosis of brake condition similar to that of the performance-based brake tester (PBBT). This was done by determining the relationship between pressure and brake force (P-BF), compensating for the gross vehicle weight (GVW). The nature of this P-BF relationship (e.g., low braking force for a given brake application pressure) may indicate brake system problems. In order to determine the relationship between brake force and brake application pressure, a few key parameters of duty cycle information were collected. Because braking events are often brief, spanning only a few seconds, a sample rate of 10 Hz was needed. The algorithm under development required brake application pressure and speed (from which deceleration was calculated). Accurate weight estimation was also needed to properly derive the braking force from the deceleration. In order to ensure that braking force was the predominant factor in deceleration for the segments of data used in analysis, the data was screened for grade as well. Also, the analysis needed to be based on pressures above the crack pressure. The crack pressure is the pressure below which the individual brakes are not applied due the nature of the mechanical system. This value, which may vary somewhat from one wheel end to another, is approximately 10 psi. Therefore, only pressures 15 psi and above were used in the analysis. The Department of Energy s Medium Truck Duty Cycle research has indicated that under the real-world circumstances of the test vehicle brake pressures of up to approximately 30 psi can be expected. Several different types of data were collected during the testing task of this project. Constant-pressure stopping tests were conducted at several combinations of brake application pressure (15, 20, 25, and 30 psi), load conditions (moderately and fully laden), and speeds (20 and 30 mph). Data was collected at 10 Hz. Standard and stepped-pressure performance-based brake tests with brake pressure transducers were performed for each loading condition. The stepped-pressure test included the constant-pressure intervals of brake application at 15, 20, 25, and 30 psi. The PBBT data files included 10 Hz streaming data collected during the testing of each axle. Two weeks of real-world duty cycle (driving and braking) data was also collected at 10 Hz. Initial analysis of the data revealed that the data collected in the field (i.e., day-to-day operations) provided the same information as that obtained from the controlled tests. Analysis of the data collected revealed a strong linear relationship between brake application pressure and deceleration for given GVWs. As anticipated, initial speed was not found to be a significant factor in the deceleration-pressure relationship, unlike GVW. The positive results obtained from this proof of concept test point to the need for further research to expand this concept. A second phase should include testing over a wider range of speeds and include medium brake application pressures in addition to the low pressures tested in this research. Testing on multiple vehicles would also be of value. This future phase should involve testing to determine how degradation of braking performance affects the pressure-deceleration relationship.

  10. Ignition feedback regenerative free electron laser (FEL) amplifier

    DOE Patents [OSTI]

    Kim, Kwang-Je (Burr Ridge, IL); Zholents, Alexander (Walnut Creek, CA); Zolotorev, Max (Oakland, CA)

    2001-01-01T23:59:59.000Z

    An ignition feedback regenerative amplifier consists of an injector, a linear accelerator with energy recovery, and a high-gain free electron laser amplifier. A fraction of the free electron laser output is coupled to the input to operate the free electron laser in the regenerative mode. A mode filter in this loop prevents run away instability. Another fraction of the output, after suitable frequency up conversion, is used to drive the photocathode. An external laser is provided to start up both the amplifier and the injector, thus igniting the system.

  11. Frequency-Domain Analysis of Super-Regenerative Amplifiers

    E-Print Network [OSTI]

    Dawson, Joel L.

    Since its invention in 1922, the super-regenerative amplifier (SRA) has been used in a variety of short-range, low-power, and/or low-cost wireless systems due to its simple implementation and excellent performance for a ...

  12. Regenerative memory in time-delayed neuromorphic photonic systems

    E-Print Network [OSTI]

    Romeira, B; Figueiredo, José M L; Barland, S; Javaloyes, J

    2015-01-01T23:59:59.000Z

    We investigate a regenerative memory based upon a time-delayed neuromorphic photonic oscillator and discuss the link with temporal localized structures. Our experimental implementation is based upon a optoelectronic system composed of a nanoscale nonlinear resonant tunneling diode coupled to a laser that we link to the paradigm of neuronal activity, the FitzHugh-Nagumo model with delayed feedback.

  13. Integrated vehicle dynamics control via coordination of active front steering and rear braking

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Integrated vehicle dynamics control via coordination of active front steering and rear brakingComputer and Automation Research Institue, Hungarian Academy of Sciences, Kende u. 13-17, H-1111, Budapest, Hungary, Email front steering and rear braking in a driver- assist system for vehicle yaw control. The proposed control

  14. Vehicle yaw control via coordinated use of steering/braking systems

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Vehicle yaw control via coordinated use of steering/braking systems M. Doumiati, O. Sename, J.sename@gipsa-lab.grenoble-inp.fr) Computer and Automation Research Institute, Hungarian Academy of Sciences, Kende u. 13-17, H-1111, Budapest with steer- ing/braking coordination task for vehicle yaw control. For steerability enhancement, only active

  15. Modeling the pneumatic subsystem of a S-cam air brake system 

    E-Print Network [OSTI]

    Coimbatore Subramanian, Shankar

    2004-09-30T23:59:59.000Z

    The air brake system is one of the critical components in ensuring the safe operation of any commercial vehicle. This work is directed towards the development of a fault-free model of the pneumatic subsystem of the air brake system. This model can...

  16. Modeling the pneumatic relay valve of an s-cam air brake 

    E-Print Network [OSTI]

    Vilayannur Natarajan, Shankar

    2005-08-29T23:59:59.000Z

    by the driver, when there are no faults or defects in the brake system. This thesis is aimed at modeling and experimentally corroborating a subsystem of an air brake system, namely the pneumatic relay valve. The pneumatic relay valve takes a input signal from...

  17. Fault tolerant control of automatically controlled vehicles in response to brake system failures 

    E-Print Network [OSTI]

    Hsien, Li-Wei

    1998-01-01T23:59:59.000Z

    in the brake system is vital. In this thesis, nonlinear failure detection filters are used for fault detection of sensors and actuators in a class of nonlinear systems. In this thesis, the effects of brake system failures in an AHS where the vehicle steering...

  18. Fault tolerant control of automatically controlled vehicles in response to brake system failures

    E-Print Network [OSTI]

    Hsien, Li-Wei

    1998-01-01T23:59:59.000Z

    in the brake system is vital. In this thesis, nonlinear failure detection filters are used for fault detection of sensors and actuators in a class of nonlinear systems. In this thesis, the effects of brake system failures in an AHS where the vehicle steering...

  19. Emission Factor for Antimony in Brake Abrasion Dusts as One of the

    E-Print Network [OSTI]

    Short, Daniel

    originating from automobiles. Abrasion dusts from commercially available brake pads (nonasbestos organic type factors originating from automobiles were approximately 32 µg Sb/braking/car for PM10 and 22 µg Sb of automobiles to the atmospheric Sb concen- tration. The emission factors of pollutants from automobiles have

  20. Wind turbine trailing-edge aerodynamic brake design

    SciTech Connect (OSTI)

    Quandt, G.

    1996-01-01T23:59:59.000Z

    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.

  1. Preliminary survey report: control technology for brake lining at Northwest Local School District, Cincinnati, Ohio

    SciTech Connect (OSTI)

    Cooper, T.C.; McGlothlin, J.D.; Godbey, F.W.; Sheehy, J.W.; O'Brien, D.M.

    1986-05-01T23:59:59.000Z

    A walk-through survey of control technology for reducing asbestos exposure during maintenance and repair of vehicular brakes was conducted at Northwest Local School District, Cincinnati, Ohio in January, 1986. The primary method for controlling and collecting dust during brake servicing was a wet-washing technique and good work practices, ensuring that exposure to hazardous physical or chemical agents was reduced or eliminated. Also available was an enclosed-type brake assembly cleaner designed to be connected to the shop air and a vacuum system. The brake assembly cleaner did not have a viewing port to examine the area being cleaned. The operator had to remove the unit to inspect the cleaned area potentially exposing himself to any dust remaining on the brake shoes or hub. The unit itself was a potential dust source as it was designed to fit 16-inch wheels and did not form a tight seal on the smaller 15-inch wheels of the newer buses. The authors conclude that the wet wash technique is an excellent method for controlling asbestos emissions during brake maintenance. The vacuum brake-assembly cleaner is inadequate and potentially hazardous. An in-depth survey of the wet technique is recommended.

  2. Microcomputer analysis of regenerative heat exchangers for oscillating flow

    SciTech Connect (OSTI)

    Hutchinson, R.A.; Lyke, S.E.

    1987-03-01T23:59:59.000Z

    Regenerative heat exchangers for use in oscillating flows such as those occurring in Stirling engines present considerable analytical problems to the thermal engineer. A simplified finite element analysis has been implemented in a spreadsheet, providing improved access to analytical assumptions and allowing parametric analysis of current heat transfer data. In addition, an irreversibility analysis has been implemented using the thermal and friction results in the spreadsheet. It is suited for evaluation and insights into loss tradeoffs inside operating regenerators, to suggest new regenerator design concepts, and to focus experimental work. 22 refs., 13 figs.

  3. Integration and Dynamics of a Renewable Regenerative Hydrogen Fuel Cell System

    E-Print Network [OSTI]

    Victoria, University of

    Integration and Dynamics of a Renewable Regenerative Hydrogen Fuel Cell System by Alvin Peter, hydrogen and electricity storage, and fuel cells. A special design feature of this test bed is the ability of the author. #12;ii Supervisory Committee Integration and Dynamics of a Renewable Regenerative Hydrogen Fuel

  4. Fast Threat Detection and Localization Using Super-Regenerative Transceiver in

    E-Print Network [OSTI]

    Zhang, Yan

    Fast Threat Detection and Localization Using Super-Regenerative Transceiver in Random Noise Radar-Regenerative (SRG) transceiver as a type of ultra-fast electronics platform for threat detection and localization the Angle-of-Arrival (AOA) information of the inbound threats. Simulations and detailed laboratory

  5. Analyses of regenerative wave patterns in adult hair follicle populations reveal

    E-Print Network [OSTI]

    Chuong, Cheng-Ming

    Analyses of regenerative wave patterns in adult hair follicle populations reveal macro of Medicine, University of Southern California, Los Angeles, CA, USA ABSTRACT The control of hair growth tools. Complex hair cycle domains and regenerative hair waves are present in normal adult (> 2 month

  6. Journal of Power Sources 210 (2012) 286291 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    Arnold, Craig B.

    2012-01-01T23:59:59.000Z

    solar and wind sys- tems and regenerative braking in cars. New battery chemistries and control systems

  7. 194 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 56, NO. 1, JANUARY 2009 PWM Method to Eliminate Power Sources in a

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    unidirectional if the machine is not using regenerative braking. In this paper, these nine power supplies

  8. Energy Flow: A Multimodal `Ready' Indication For Electric Vehicles

    E-Print Network [OSTI]

    and current energy consumption [18]. Furthermore, factors such as regenerative braking and low noise driving

  9. ECE 331 Electromechanical Energy Conversion Catalog Description: Energy conversion principles for electric motors. Steady-state

    E-Print Network [OSTI]

    -phase synchronous machines: wound rotor and permanent magnet. Direct-current machines. Regenerative braking

  10. Computation of Optimal Current References for Flux-weakening of Multi-Phase Synchronous

    E-Print Network [OSTI]

    Boyer, Edmond

    the start-stop concept, a regenerative braking and torque assistance. The torque boost makes possible

  11. Performance of Networked Control Systems under Sporadic Feedback

    E-Print Network [OSTI]

    Lemmon, Michael

    Regenerative Braking power inverter storage Micro-Grid Renewable Generation PHEV Smart Grid - Distributed

  12. Could Gaussian regenerative stations act as quantum repeaters?

    E-Print Network [OSTI]

    Ryo Namiki; Oleg Gittsovich; Saikat Guha; Norbert Lütkenhaus

    2014-10-02T23:59:59.000Z

    Higher transmission loss diminishes the performance of optical communication|be it the rate at which classical or quantum data can be sent reliably, or the secure key generation rate of quantum key distribution (QKD). Loss compounds with distance|exponentially in an optical fiber, and inverse-square with distance for a free-space channel. In order to boost classical communication rates over long distances, it is customary to introduce regenerative relays at intermediate points along the channel. It is therefore natural to speculate whether untended regenerative stations, such as phase-insensitive or phase-sensitive optical amplifiers, could serve as repeaters for long-distance QKD. The primary result of this paper rules out all bosonic Gaussian channels to be useful as QKD repeaters, which include phase-insensitive and phase-sensitive amplifiers as special cases, for any QKD protocol. We also delineate the conditions under which a Gaussian relay renders a lossy channel entanglement breaking, which in turn makes the channel useless for QKD.

  13. Braking index of isolated uniformly rotating magnetized pulsars

    E-Print Network [OSTI]

    Hamil, Oliver; Urbanec, Martin; Urbancova, Gabriela

    2015-01-01T23:59:59.000Z

    Isolated pulsars are rotating neutron stars with accurately measured angular velocities $\\Omega$, and their time derivatives which show unambiguously that the pulsars are slowing down. Although the exact mechanism of the spin-down is a question of debate in detail, the commonly accepted view is that it arises through emission of magnetic dipole radiation (MDR) from a rotating magnetized body. Other processes, including the emission of gravitational radiation, and of relativistic particles (pulsar wind), are also being considered. The calculated energy loss by a rotating pulsar with a constant moment of inertia is assumed proportional to a model dependent power of $\\Omega$. This relation leads to the power law $\\dot{\\Omega}$ = -K $\\Omega^{\\rm n}$ where $n$ is called the braking index. The MDR model predicts $n$ exactly equal to 3. Selected observations of isolated pulsars provide rather precise values of $n$, individually accurate to a few percent or better, in the range 1$ <$ n $ < $ 2.8, which is consi...

  14. Preliminary survey report: evaluation of brake-drum service controls at Pennsylvania Bureau of Vehicle Management, Vehicle Maintenance Division, Harrisburg, Pennsylvania

    SciTech Connect (OSTI)

    Van Wagenen, H.D.

    1987-03-01T23:59:59.000Z

    Exposure to asbestos during the servicing of brakes on state-owned vehicles at the Bureau of Vehicle Management Maintenance Division, Harrisburg, Pennsylvania, was investigated as part of a study of control technologies. Brakes had been serviced at this garage facility for the previous year using a BCE-1000 Clayton brake-cleaning unit, sized for cars, vans, and pickups. The brake-cleaning unit consisted of a transparent enclosure hood and a HEPA vacuum filter dust collector, designed to contain and collect all brake-lining dust during vehicular brake maintenance and replacement. The authors conclude that the Clayton BCE-1000 dust-control unit appeared to be effective in containing and collecting brake dust during all vehicular brake maintenance and replacement jobs in this situation.

  15. Performance analysis of reciprocating regenerative magnetic heat pumping. Final report

    SciTech Connect (OSTI)

    Chen, D.T. [Oak Ridge Associated Universities, Inc., TN (United States); Murphy, R.W.; Mei, V.C.; Chen, F.C.; Lue, J.W.; Lubell, M.S. [Oak Ridge National Lab., TN (United States)

    1994-02-01T23:59:59.000Z

    Transient flow phenomena in the regenerator tube of reciprocating magnetic heat pumps have been studied numerically and experimentally. In the numerical study, two approaches were taken: (1) solving the energy balance equations for fluid through a porous bed directly and (2) solving the Navier-Stokes equations with a buoyancy force term in the momentum equation. A flow thermal mixing problem was found in both approaches because of the piston-like motion of the regenerator tube that hinders the development of the temperature. The numerical study results show that a 45 K temperature span can be reached in 10 minutes of charge time through the use of a 7-Tesla magnetic field. Using the second numerical approach, temperature stratification in the regenerator fluid column was clearly indicated through temperature rasters. The study also calculates regenerator efficiency and energy delivery rates when heating load and cooling load are applied. Piecewise variation of the regenerator tube moving speed has been used in the present numerical study to control the mass flow rate, reduce thermal mixing of the flow and thus the regenerative losses. The gadolinium`s adiabatic temperature has been measured under 6.5 Tesla of magnet field and different of operating temperatures ranging from 285 K to 320 K. Three regenerative heat pumping tests have also been conducted based on the Reynolds number of the regenerator tube flow, namely Re=300, Re=450, and Re=750 without loads. Maximum temperature span are 12 & 11 K and 9 K for the case of Re=300, Re=450 and Re=750, respectively. Experimental data are in good agreement with the numerical calculation results, and have been used to calibrate the numerical results and to develop a design database for reciprocating-type room-temperature magnetic heat pumps.

  16. Symposium Encourages Collaborative Efforts in Regenerative Medicine NC State University and The University of North Carolina at Chapel Hill held its first joint

    E-Print Network [OSTI]

    Langerhans, Brian

    and progress in regenerative medicine. There were three oral sessions (Bone, Cartilage and RegenerativeSymposium Encourages Collaborative Efforts in Regenerative Medicine NC State University and The University of North Carolina at Chapel Hill held its first joint symposium on regenerative medicine

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

    E-Print Network [OSTI]

    Hayward, Vincent

    On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering, linear dampers for haptic rendering using a prototype haptic device outfitted with eddy current brakes discuss the results from haptic experiments for rendering viscosity, virtual walls and virtual friction

  18. Initial results using Eddy Current Brakes as Fast Turn-on, Programmable Physical Dampers for Haptic Rendering

    E-Print Network [OSTI]

    Hayward, Vincent

    Initial results using Eddy Current Brakes as Fast Turn-on, Programmable Physical Dampers for Haptic Machines McGill University, Montr´eal, Qu´ebec, Canada ABSTRACT We demonstrate the use of eddy current propose an alternate method to create damping in a haptic interface that uses eddy current brakes. 2 EDDY

  19. Recycled brake linings as partial aggregate substitute in asphalt paving. Construction and final report. Report for July 1992-August 1996

    SciTech Connect (OSTI)

    Miller, P.A.; Sukley, R.

    1996-09-01T23:59:59.000Z

    The purpose of this project was to evaluate the performance of asphalt containing various percentages of brake lining as an aggregate, and compare its performance to that of normal asphalt containing natural aggregate. This project is an effort to explore alternate ways to use waste product. Four test section of FB-2 Modified mix containing brake lining materials were placed in July 1992 along with one control section on SR 3022 in Mercer county. To date all sections are performing satisfactory, and Brake linings should be recommended as a viable partial replacement of aggregate in bituminous materials. This study only considered the performance of only off-spec brake linings, therefore, any performance data or enviromental effects of placement of used brake material should be addressed.

  20. REPORT on the TRUCK BRAKE LINING WORKSHOP and FLEET OPERATORS' SURVEY

    SciTech Connect (OSTI)

    Blau, P.J.

    2003-02-03T23:59:59.000Z

    The report summarizes what transpired during brake linings-related workshop held at the Fall 2003 meeting of the Technology and Maintenance Council (TMC) in Charlotte, NC. The title of the workshop was ''Developing a Useful Friction Material Rating System''. It was organized by a team consisting of Peter Blau (Oak Ridge National Laboratory), Jim Britell (National Highway Traffic Safety Administration), and Jim Lawrence (Motor and Equipment Manufacturers Association). The workshop was held under the auspices of TMC Task Force S6 (Chassis), chaired by Joseph Stianche (Sanderson Farms, Inc.). Six invited speakers during the morning session provided varied perspectives on testing and rating aftermarket automotive and truck brake linings. They were: James R. Clark, Chief Engineer, Foundation Brakes and Wheel Equipment, Dana Corporation, Spicer Heavy Axle and Brake Division; Charles W. Greening, Jr, President, Greening Test Labs; Tim Duncan, General Manager, Link Testing Services;Dennis J. McNichol, President, Dennis NationaLease; Jim Fajerski, Business Manager, OE Sales and Applications Engineering, Federal Mogul Corporation; and Peter J. Blau, Senior Materials Development Engineer, Oak Ridge National Laboratory. The afternoon break-out sessions addressed nine questions concerning such issues as: ''Should the federal government regulate aftermarket lining quality?''; ''How many operators use RP 628, and if so, what's good or bad about it?''; and ''Would there be any value to you of a vocation-specific rating system?'' The opinions of each discussion group, consisting of 7-9 participants, were reported and consolidated in summary findings on each question. Some questions produced a greater degree of agreement than others. In general, the industry seems eager for more information that would allow those who are responsible for maintaining truck brakes to make better, more informed choices on aftermarket linings. A written fleet operator survey was also conducted during the TMC meeting. Twenty-one responses were received, spanning fleet sizes between 12 and 170,000 vehicles. Responses are summarized in a series of tables separated into responses from small (100 or fewer powered vehicles), medium (101-1000 vehicles), and large fleets (>1000 vehicles). The vast majority of fleets do their own brake maintenance, relying primarily on experience and lining manufactures to select aftermarket linings. At least half of the responders are familiar to some extent with TMC Recommended Practice 628 on brake linings, but most do not use this source of test data as the sole criterion to select linings. Significant shortfalls in the applicability of TMC RP 628 to certain types of brake systems were noted.

  1. Neutron scattering residual stress measurements on gray cast iron brake discs

    SciTech Connect (OSTI)

    Spooner, S.; Payzant, E.A.; Hubbard, C.R. [and others

    1996-11-01T23:59:59.000Z

    Neutron diffraction was used to investigate the effects of a heat treatment designed to remove internal residual stresses in brake discs. It is believed that residual stresses may change the rate of deformation of the discs during severe braking conditions when the disc temperature is increased significantly. Neutron diffraction was used to map out residual strain distributions in a production disc before and after a stress-relieving heat treatment. Results from these neutron diffraction experiments show that some residual strains were reduced by as much as 400 microstrain by stress relieving. 5 refs., 5 figs., 1 tab.

  2. Classical and quantum Big Brake cosmology for scalar field and tachyonic models

    SciTech Connect (OSTI)

    Kamenshchik, A. Yu. [Dipartimento di Fisica e Astronomia and INFN, Via Irnerio 46, 40126 Bologna (Italy) and L.D. Landau Institute for Theoretical Physics of the Russian Academy of Sciences, Kosygin str. 2, 119334 Moscow (Russian Federation); Manti, S. [Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy)

    2013-02-21T23:59:59.000Z

    We study a relation between the cosmological singularities in classical and quantum theory, comparing the classical and quantum dynamics in some models possessing the Big Brake singularity - the model based on a scalar field and two models based on a tachyon-pseudo-tachyon field . It is shown that the effect of quantum avoidance is absent for the soft singularities of the Big Brake type while it is present for the Big Bang and Big Crunch singularities. Thus, there is some kind of a classical - quantum correspondence, because soft singularities are traversable in classical cosmology, while the strong Big Bang and Big Crunch singularities are not traversable.

  3. Cell Microenvironment Engineering and Monitoring for Tissue Engineering and Regenerative Medicine: The Recent Advances

    E-Print Network [OSTI]

    Barthes, Julien

    In tissue engineering and regenerative medicine, the conditions in the immediate vicinity of the cells have a direct effect on cells’ behaviour and subsequently on clinical outcomes. Physical, chemical, and biological ...

  4. Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine

    E-Print Network [OSTI]

    Kroeger, Timothy H

    2013-09-19T23:59:59.000Z

    The brake torque of a direct-injection diesel engine is known to plateau over a range of injection timings. Injection timing affects the engine’s ignition delay and the fractions of fuel which burn in premixed and diffusion modes. Therefore...

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

    E-Print Network [OSTI]

    Berman, Andrea Helene

    1994-01-01T23:59:59.000Z

    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...

  6. A regenerative multiple zone model for HCCI combustion

    SciTech Connect (OSTI)

    Hamosfakidis, Vasileios; Im, Hong G.; Assanis, Dennis N. [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States)

    2009-04-15T23:59:59.000Z

    A new conserved scalar approach, the so-called regenerative multiple zone (RMZ) model, is introduced to simulate combustion in homogeneous charge compression ignition (HCCI) engines with significant products of combustion. In this approach, two conserved scalars are introduced, the mixture fraction Z and the initial exhaust gas fraction J, to determine uniquely the state of the reactive system as a function of the two conserved scalars and time. For the numerical solution of the HCCI combustion, the conserved scalar plane is divided into different zones, which represent homogeneous reactors with constant initial exhaust gas level. Particularly, the zones are created based on the distribution of the initial exhaust gases and are mixed and regenerated at every time step during combustion in order to account for the history effects which are due to the finite rate chemistry. A proper methodology to create and initialize the new zones during the combustion, the so-called zone creation strategy (ZCS), is also proposed. For validation, the RMZ model is implemented in the 2DRD code, which is a computational fluid dynamics code that solves the governing equations for a two-dimensional reaction-diffusion problem. Initially, the consistency of the new model is validated in a one-dimensional reaction-diffusion (RD) case. Subsequently, the necessity for a proper zone creation strategy is demonstrated by a two-dimensional RD case. Next, a parametric study is performed to investigate the sensitivity of the new model on the maximum number of zones that is used. Finally, the limitations as well as the advantages of the RMZ model are discussed. (author)

  7. Nonlinear analysis of time series of vibration data from a friction brake: SSA, PCA, and MFDFA

    E-Print Network [OSTI]

    Nikolay K. Vitanov; Norbert P. Hoffmann; Boris Wernitz

    2014-10-23T23:59:59.000Z

    We use the methodology of singular spectrum analysis (SSA), principal component analysis (PCA), and multi-fractal detrended fluctuation analysis (MFDFA), for investigating characteristics of vibration time series data from a friction brake. SSA and PCA are used to study the long time-scale characteristics of the time series. MFDFA is applied for investigating all time scales up to the smallest recorded one. It turns out that the majority of the long time-scale dynamics, that is presumably dominated by the structural dynamics of the brake system, is dominated by very few active dimensions only and can well be understood in terms of low dimensional chaotic attractors. The multi-fractal analysis shows that the fast dynamical processes originating in the friction interface are in turn truly multi-scale in nature.

  8. Modeling the pneumatic relay valve of an s-cam air brake

    E-Print Network [OSTI]

    Vilayannur Natarajan, Shankar

    2005-08-29T23:59:59.000Z

    inspections. For example, defects like chafed hoses do not show pronounced effect in performance based tests. In the past only a few cases of air leak violations have been detected by the conventional performance based testers namely roller dynamometer... detected by the performance based system since they had a pronounced effect on the brake force. Reference [6] emphasizes on the need for a standardized, hand held diagnostic tool for improving the existing inspections. A model based, performance based diag...

  9. Variations in gear fatigue life for different wind turbine braking strategies

    SciTech Connect (OSTI)

    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

    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.

  10. Generation of ultrashort radiation pulses by injection locking a regenerative free-electron-laser amplifier

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Generation of ultrashort radiation pulses by injection locking a regenerative free-electron-laser 12609-5 PACS number s : 41.60.Cr, 42.60.Da I. INTRODUCTION AND MOTIVATION The free-electron laser FEL demonstrate how a steady-state train of ultrashort radiation pulses can be produced utilizing a new free-electron

  11. Pitting corrosion control using regenerative biolms on aluminium 2024 in articial seawater

    E-Print Network [OSTI]

    Wood, Thomas K.

    Pitting corrosion control using regenerative bio®lms on aluminium 2024 in arti®cial seawater D, CT 06269-3222, USA b Corrosion and Environment Eects Laboratory (CEEL), Department of Materials polyglutamate or polyaspartate, an additional small increase in corrosion inhibition occurred. Corrosion control

  12. Corrosion control using regenerative biofilms (CCURB) on brass in different media

    E-Print Network [OSTI]

    Wood, Thomas K.

    Corrosion control using regenerative biofilms (CCURB) on brass in different media D. OOrnek a , T of Chemical Engineering, University of Connecticut, Storrs, CT 06269-3222, USA b Corrosion and Environmental The corrosion behavior of cartridge brass (UNS C26000) exposed to artificial seawater (AS) and Luria Bertani (LB

  13. Corrosion Control Using Regenerative Biofilms on Aluminum 2024 and Brass in Different Media

    E-Print Network [OSTI]

    Wood, Thomas K.

    Corrosion Control Using Regenerative Biofilms on Aluminum 2024 and Brass in Different Media F. Mansfeld,a, *,z H. Hsu,a D. O¨ rnek,b T. K. Wood,b and B. C. Syrettc a Corrosion and Environmental Effects Institute, Palo Alto, California 94303, USA The corrosion behavior of Al 2024-T3 and C26000 brass exposed

  14. ENSC 461 PROJECT: Development of a new hydraulic regenerative energy storage system

    E-Print Network [OSTI]

    Bahrami, Majid

    the lead­acid batteries in certain stand-alone stationary equipment applications. The first targeted performance is comparable with the lead­acid batteries; but HRS remains more expensive. The HRS has batteries, among them is hydraulic regenerative system (HRS). Principle of operation: electricity is used

  15. Regenerative Hair Waves in Aging Mice and Extra-Follicular Modulators Follistatin, Dkk1,

    E-Print Network [OSTI]

    Chuong, Cheng-Ming

    Regenerative Hair Waves in Aging Mice and Extra-Follicular Modulators Follistatin, Dkk1, and Sfrp4 , Oscar K. Lee2,6 , Randall B. Widelitz1 and Cheng-Ming Chuong1,2 Hair cycling is modulated by factors both intrinsic and extrinsic to hair follicles. Cycling defects lead to conditions such as aging

  16. Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking

    E-Print Network [OSTI]

    A. Allen; Z. Y. Li; F. H. Shu

    2003-11-17T23:59:59.000Z

    We study numerically the collapse of rotating, magnetized molecular cloud cores, focusing on rotation and magnetic braking during the main accretion phase of isolated star formation. Motivated by previous numerical work and analytic considerations, we idealize the pre-collapse core as a magnetized singular isothermal toroid, with a constant rotational speed everywhere. The collapse starts from the center, and propagates outwards in an inside-out fashion, satisfying exact self-similarity in space and time. For rotation rates and field strengths typical of dense low-mass cores, the main feature remains the flattening of the mass distribution along field lines -- the formation of a pseudodisk, as in the nonrotating cases. The density distribution of the pseudodisk is little affected by rotation. On the other hand, the rotation rate is strongly modified by pseudodisk formation. Most of the centrally accreted material reaches the vicinity of the protostar through the pseudodisk. The specific angular momentum can be greatly reduced on the way, by an order of magnitude or more, even when the pre-collapse field strength is substantially below the critical value for dominant cloud support. The efficient magnetic braking is due to the pinched geometry of the magnetic field in the pseudodisk, which strengthens the magnetic field and lengthens the level arm for braking. Both effects enhance the magnetic transport of angular momentum from inside to outside. The excess angular momentum is carried away in a low-speed outflow that has, despite claims made by other workers, little in common with observed bipolar molecular outflows. We discuss the implications of our calculations for the formation of true disks that are supported against gravity by rotation.

  17. Probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP)

    SciTech Connect (OSTI)

    Greenfield, M.A. [Univ. of California, Los Angeles, CA (United States); Sargent, T.J. [Univ. of Chicago, IL (United States)]|[Stanford Univ., CA (United States). Hoover Institution

    1998-01-01T23:59:59.000Z

    In its most recent report on the annual probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP), the annual failure rate is calculated to be 1.3E({minus}7)(1/yr), rounded off from 1.32E({minus}7). A calculation by the Environmental Evaluation Group (EEG) produces a result that is about 4% higher, namely 1.37E({minus}7)(1/yr). The difference is due to a minor error in the US Department of Energy (DOE) calculations in the Westinghouse 1996 report. WIPP`s hoist safety relies on a braking system consisting of a number of components including two crucial valves. The failure rate of the system needs to be recalculated periodically to accommodate new information on component failure, changes in maintenance and inspection schedules, occasional incidents such as a hoist traveling out-of-control, either up or down, and changes in the design of the brake system. This report examines DOE`s last two reports on the redesigned waste hoist system. In its calculations, the DOE has accepted one EEG recommendation and is using more current information about the component failures rates, the Nonelectronic Parts Reliability Data (NPRD). However, the DOE calculations fail to include the data uncertainties which are described in detail in the NPRD reports. The US Nuclear Regulatory Commission recommended that a system evaluation include mean estimates of component failure rates and take into account the potential uncertainties that exist so that an estimate can be made on the confidence level to be ascribed to the quantitative results. EEG has made this suggestion previously and the DOE has indicated why it does not accept the NRC recommendation. Hence, this EEG report illustrates the importance of including data uncertainty using a simple statistical example.

  18. Hybrid Braking System for Non-Drive Axles | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(Fact Sheet), GeothermalGridHYDROGEND D e e pShade YourHybirdBraking System for

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

    DOE Patents [OSTI]

    Rau, Scott James

    2013-01-29T23:59:59.000Z

    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.

  20. 1642 IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, VOL. 14, NO. 4, DECEMBER 2013 Minimal-Energy Driving Strategy for High-Speed

    E-Print Network [OSTI]

    Tong, Lang

    , including the extended speed range, energy efficiency, and regenerative braking. Based on this model, train the regenerative brake to feed back the kinetic energy, etc. On the other hand, a proper driving strategy can also

  1. One-volt p-InP/n-CdSe regenerative photoelectrochemical cell

    SciTech Connect (OSTI)

    Ang, P.G.P.; Sammells, A.F.

    1983-08-01T23:59:59.000Z

    Features and performance of a two-photoelectrode regenerative photoelectrochemical (PEC) cell that yielded a combined photovoltage of more than one volt are reported. The photoanode was n-CdSe, the photocathode was p-InP, and the electrolyte was aqueous sulfide/polysulfide. Details of the fabrication process are provided, including formation of an ohmic contact by sputter deposited gold and then electroplating the photocathode with Zn, followed by a final sputtered gold layer. Tests under 100 mW/sq cm illumination of the unoptimized regenerative cell produced an open circuit voltage of 1.15 V, a short circuit current of 24 mA/sq cm, a fill factor of 0.40, and an overall efficiency of 5.5 percent.

  2. EDITED BY CAROLINE ASH CREDITS(TOPTOBOTTOM):BURMANNETAL.;MATZELETAL.

    E-Print Network [OSTI]

    Leake, Mark C.

    , such as in regenerative braking in hybrid cars. For very small power requirements, capaci- tors have not been competitive

  3. ARES NW Power and Conservation Council Presentation

    E-Print Network [OSTI]

    Shortfall of power, due to high demand, energy supplied into the grid by regenerative braking of shuttle

  4. Module 8: Fuel Cell Hybrid Electric Vehicles

    Broader source: Energy.gov [DOE]

    This course covers hybrid electric vehicles, electric motors, auxiliary power units, generators, energy storage systems, regenerative braking, control systems

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

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    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 ...

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

    E-Print Network [OSTI]

    Hopkins, Jennifer Susan

    1995-01-01T23:59:59.000Z

    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...

  7. Uncertainty-Enabled Design of a Rocket Sled Track Switch Drs. Jordan E. Massad and Matthew R. Brake

    E-Print Network [OSTI]

    Uncertainty-Enabled Design of a Rocket Sled Track Switch Drs. Jordan E. Massad and Matthew R. Brake Sandia National Laboratories, New Mexico Rocket sled tracks provide a dynamically rich environment acceleration profile, the switch closes to complete a circuit for instrument activation. Preliminary tests

  8. Hybrid: Braking

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center Home PageStationGreenhouse GasCalifornia State0

  9. Hybrid: Braking

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center Home PageStationGreenhouse GasCalifornia State0Button Stopped button

  10. Hybrid: Braking

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeIdle Reduction WeightRebate -

  11. Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking

    E-Print Network [OSTI]

    Allen, A; Shu, F H

    2003-01-01T23:59:59.000Z

    We study numerically the collapse of rotating, magnetized molecular cloud cores, focusing on rotation and magnetic braking during the main accretion phase of isolated star formation. Motivated by previous numerical work and analytic considerations, we idealize the pre-collapse core as a magnetized singular isothermal toroid, with a constant rotational speed everywhere. The collapse starts from the center, and propagates outwards in an inside-out fashion, satisfying exact self-similarity in space and time. For rotation rates and field strengths typical of dense low-mass cores, the main feature remains the flattening of the mass distribution along field lines -- the formation of a pseudodisk, as in the nonrotating cases. The density distribution of the pseudodisk is little affected by rotation. On the other hand, the rotation rate is strongly modified by pseudodisk formation. Most of the centrally accreted material reaches the vicinity of the protostar through the pseudodisk. The specific angular momentum can b...

  12. A one-volt p-InP/n-CdSe regenerative photoelectrochemical cell

    SciTech Connect (OSTI)

    Ang, P.G.P.; Sammells, A.F.

    1983-08-01T23:59:59.000Z

    Photoelectrochemical (PEC) cells have the potential utility of being used for either the direct conversion of solar energy to electricity as in regenerative devices or to generate stored redox species which can later be electrochemically discharged in a suitable cell. This latter approach has been particularly intriguing over the last few years. However, although several photoelectrochemical storage cells have been discussed, it has become increasingly desirable to have a high-voltage (approx. =1 V) PEC cell, so that the storage cell with which it is associated has some hope of being competitive with presently available commercial batteries.

  13. A Braking Index for the Young, High-Magnetic-Field, Rotation-Powered Pulsar in Kes 75

    E-Print Network [OSTI]

    Margaret A. Livingstone; Victoria M. Kaspi; E. V. Gotthelf; Lucien Kuiper

    2006-04-21T23:59:59.000Z

    We present the first phase-coherent measurement of a braking index for the young, energetic rotation-powered pulsar PSR J1846-0258. This 324 ms pulsar is located at the center of the supernova remnant Kes 75 and has a characteristic age of tau_c = 723 years, a spin-down energy of 8.3x10^{36}erg/s, and inferred magnetic field of 4.9x10^{13} G. Two independent phase-coherent timing solutions are derived which together span 5.5 yr of data obtained with the Rossi X-ray Timing Explorer. In addition, a partially phase-coherent timing analysis confirms the fully phase-coherent result. The measured value of the braking index, n=2.65+/-0.01, is significantly less than 3, the value expected from magnetic dipole radiation, implying another physical process must contribute to the pulsar's rotational evolution. Assuming the braking index has been constant since birth, we place an upper limit on the spin-down age of J1846-0258 of 884 yr, the smallest age estimate of any rotation-powered pulsar.

  14. "By the hundred's of thousand's, these unlikely transportation revolutionaries are forgoing the safety of a steel cage with airbags and anti-lock brakes for a wispy two-wheeled exoskeleton as they make their way to work,

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    the safety of a steel cage with airbags and anti-lock brakes for a wispy two-wheeled exoskeleton as they make

  15. SNAP-BACK: a stable regenerative breakdown mode of MOS devices

    SciTech Connect (OSTI)

    Ochoa, A. Jr.; Sexton, F.W.; Wrobel, T.F.; Hash, G.L.; Sokel, R.J.

    1983-01-01T23:59:59.000Z

    N-channel MOS transistors used in nMOS and in CMOS microelectronic circuits have a drain-to-source breakdown characteristic showing a negative resistance region. Activating this mode of operation leads to a drop in source-to-drain voltage and to a large drain current. Snap-back is not a four-layer (SCR, latch-up) phenomenon, but, like latch-up, can be initiated by current injection into the p-well, by avalanching junctions or by exposure to ionizing radiation. The sustaining voltage can be significantly below the drain-substrate avalanche voltage thereby limiting the maximum operating voltage. In this paper we present a qualitative model for snap-back - local conductivity modulation occurs in the intrinsic base region of the parasitic bipolar transistor leading to regenerative feedback. Effects of process variations on the snap-back characteristics are presented as are triggering sensitivities to ionizing radiation.

  16. Regenerative Fuel Cells: Renewable Energy Storage Devices Based on Neutral Water Input

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    GRIDS Project: Proton Energy Systems is developing an energy storage device that converts water to hydrogen fuel when excess electricity is available, and then uses hydrogen to generate electricity when energy is needed. The system includes an electrolyzer, which generates and separates hydrogen and oxygen for storage, and a fuel cell which converts the hydrogen and oxygen back to electricity. Traditional systems use acidic membranes, and require expensive materials including platinum and titanium for key parts of the system. In contrast, Proton Energy Systems’ new system will use an inexpensive alkaline membrane and will contain only inexpensive metals such as nickel and stainless steel. If successful, Proton Energy Systems’ system will have similar performance to today’s regenerative fuel cell systems at a fraction of the cost, and can be used to store electricity on the electric grid.

  17. Regenerative tree growth: binary self-similar continuum random trees and Poisson-Dirichlet compositions

    E-Print Network [OSTI]

    Pitman, Jim

    2008-01-01T23:59:59.000Z

    We use a natural ordered extension of the Chinese Restaurant Process to grow a two-parameter family of binary self-similar continuum fragmentation trees. We provide an explicit embedding of Ford's sequence of alpha model trees in the continuum tree which we identified in a previous article as a distributional scaling limit of Ford's trees. In general, the Markov branching trees induced by the two-parameter growth rule are not sampling consistent, so the existence of compact limiting trees cannot be deduced from previous work on the sampling consistent case. We develop here a new approach to establish such limits, based on regenerative interval partitions and the urn-model description of sampling from Dirichlet random distributions.

  18. Regeneratively cooled coal combustor/gasifier with integral dry ash removal

    DOE Patents [OSTI]

    Beaufrere, A.H.

    1982-04-30T23:59:59.000Z

    A coal combustor/gasifier is disclosed which produces a low or medium combustion gas fired furnances or boilers. Two concentric shells define a combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.

  19. Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter

    E-Print Network [OSTI]

    Horváth, Zsolt; Kamenshchik, Alexander Yu; Gergely, László Á

    2015-01-01T23:59:59.000Z

    The evolution of a closed Friedmann universe filled by a tachyon scalar field with a trigonometric potential and cold dark matter (CDM) is investigated. A subset of the evolutions consistent to 1$\\sigma $ confidence level with the Union 2.1 supernova data set is identified. The evolutions of the tachyon field are classified. Some of them evolve into a de Sitter attractor, while others proceed through a pseudo-tachyonic regime into a sudden future singularity. Critical evolutions leading to Big Brake singularities in the presence of CDM are found and a new type of cosmological evolution characterized by singularity avoidance in the pseudo-tachyon regime is presented.

  20. A closed-loop quasi-optimal dynamic braking resistor and shunt reactor control strategy for transient stability

    SciTech Connect (OSTI)

    Rahim, A.H.M.A.; Alamgir, D.A.H.

    1988-08-01T23:59:59.000Z

    A control strategy for dynamic braking resistor and shunt reactor is proposed for stabilization of power systems when subject to large disturbances. The time optimal control is derived as a function of synchronous machine power, its rotor angular position and speed deviation. The response for a single machine system with the proposed control has been compared with that from the time optimal solution obtained through the steepest descent method. The strategy has also been tested on two multimachine systems. Results indicate that the proposed strategy provides a simple and effective method of stabilization under transient emergency conditions.

  1. Optimization and Demonstration of a Solid Oxide Regenerative Fuel Cell System

    SciTech Connect (OSTI)

    James F. McElroy; Darren B. Hickey; Fred Mitlitsky

    2006-09-30T23:59:59.000Z

    Single cell solid oxide regenerative fuel cells (SORFCs) have been demonstrated for over 1000 hours of operation at degradation rates as low as 0.5% per thousand hours for current densities as high as 300mA/cm{sup 2}. Efficiency levels (fuel cell power out vs. electrolysis power in) have been demonstrated in excess of 80% at 100mA/cm{sup 2}. All testing has been performed with metallic based interconnects and non-noble metal electrodes in order to limit fabrication costs for commercial considerations. The SORFC cell technology will be scaled up to a 1kW sized stack which will be demonstrated in Year 2 of the program. A self contained SORFC system requires efficient thermal management in order to maintain operating temperatures during exothermic and endothermic operational modes. The use of LiF as a phase change material (PCM) was selected as the optimum thermal storage medium by virtue of its superior thermal energy density by volume. Thermal storage experiments were performed using LiF and a simulated SORFC stack. The thermal storage concept was deemed to be technically viable for larger well insulated systems, although it would not enable a high efficiency thermally self-sufficient SORFC system at the 1 kW level.

  2. Regeneratively cooled coal combustor/gasifier with integral dry ash removal

    DOE Patents [OSTI]

    Beaufrere, Albert H. (Huntington, NY)

    1983-10-04T23:59:59.000Z

    A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.

  3. A Parametric Study for Regenerative Ammonia-Based Scrubbing for the Capture of CO2

    SciTech Connect (OSTI)

    Resnik, K.P.; Garber, W.; Hreda, D.C.; Yeh, J.T.; Pennline, H.W.

    2006-09-01T23:59:59.000Z

    A continuous gas and liquid flow, regenerative scrubbing process for CO2 capture is currently being demonstrated at the bench-scale level. An aqueous ammonia-based solution captures CO2 from simulated flue gas in an absorber and releases a nearly pure stream of CO2 in the regenerator. After the regeneration, the solution of ammonium compounds is recycled to the absorber. The design of the continuous flow unit was based on earlier exploratory results from a semi-batch reactor, where a CO2 and N2 gas mixture flowed through a well-mixed batch of ammonia-based solution. Recently, a series of tests have been conducted on the continuous unit to observe the effect of various parameters on CO2 removal efficiency and regenerator effectiveness within the flow system. The parameters that were studied include absorber temperature, regenerator temperature, initial NH3 concentration, simulated flue gas flow rate, liquid solvent inventory in the flow system, and height of the packed-bed absorber. Results from this current testing campaign conducted in the continuous scrubbing unit as well as test results from a 5-cycle semi-batch reactor will be discussed.

  4. An Improved MPPT Interleaved Boost Converter for Solar Electric Vehicle Application

    E-Print Network [OSTI]

    Boyer, Edmond

    transients and recover energy during regenerative braking. The design, construction, and testing through regenerative braking [1]­[2]. For these applications, a high-power dc/dc converter is a key to assist the propulsion of the vehicle during transients and to recuperate energy during regenerative

  5. Finite element analysis of the effect of up-armouring on the off-road braking and sharp-turn performance

    E-Print Network [OSTI]

    Grujicic, Mica

    Finite element analysis of the effect of up-armouring on the off-road braking and sharp-mobility multi-purpose wheeled vehicle, off-road vehicle performance, finite element modelling and simulations revision for publication on 15 June 2009. DOI: 10.1243/09544070JAUTO1187 Abstract: A comprehensive finite

  6. An analysis of the annual probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP)

    SciTech Connect (OSTI)

    Greenfield, M.A. [Univ. of California, Los Angeles, CA (United States); Sargent, T.J.

    1995-11-01T23:59:59.000Z

    The Environmental Evaluation Group (EEG) previously analyzed the probability of a catastrophic accident in the waste hoist of the Waste Isolation Pilot Plant (WIPP) and published the results in Greenfield (1990; EEG-44) and Greenfield and Sargent (1993; EEG-53). The most significant safety element in the waste hoist is the hydraulic brake system, whose possible failure was identified in these studies as the most important contributor in accident scenarios. Westinghouse Electric Corporation, Waste Isolation Division has calculated the probability of an accident involving the brake system based on studies utilizing extensive fault tree analyses. This analysis conducted for the U.S. Department of Energy (DOE) used point estimates to describe the probability of failure and includes failure rates for the various components comprising the brake system. An additional controlling factor in the DOE calculations is the mode of operation of the brake system. This factor enters for the following reason. The basic failure rate per annum of any individual element is called the Event Probability (EP), and is expressed as the probability of failure per annum. The EP in turn is the product of two factors. One is the {open_quotes}reported{close_quotes} failure rate, usually expressed as the probability of failure per hour and the other is the expected number of hours that the element is in use, called the {open_quotes}mission time{close_quotes}. In many instances the {open_quotes}mission time{close_quotes} will be the number of operating hours of the brake system per annum. However since the operation of the waste hoist system includes regular {open_quotes}reoperational check{close_quotes} tests, the {open_quotes}mission time{close_quotes} for standby components is reduced in accordance with the specifics of the operational time table.

  7. EcoCAR 2: Meet the Teams Part I | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    over to gasoline or diesel when the battery runs out, this vehicle changes over to running on hydrogen. In addition, the vehicle employs regenerative braking, which creates...

  8. Third-Party Evaluation of Petro Tex Hydrocarbons, LLC, ReGen Lubricating Oil Re-refining Process

    SciTech Connect (OSTI)

    Compere, A L [ORNL; Griffith, William {Bill} L [ORNL

    2009-04-01T23:59:59.000Z

    This report presents an assessment of market, energy impact, and utility of the PetroTex Hydrocarbons, LLC., ReGen process for re-refining used lubricating oil to produce Group I, II, and III base oils, diesel fuel, and asphalt. PetroTex Hydrocarbons, LLC., has performed extensive pilot scale evaluations, computer simulations, and market studies of this process and is presently evaluating construction of a 23 million gallon per year industrial-scale plant. PetroTex has obtained a 30 acre site in the Texas Industries RailPark in Midlothian Texas. The environmental and civil engineering assessments of the site are completed, and the company has been granted a special use permit from the City of Midlothian and air emissions permits for the Texas Commission on Environmental Quality.

  9. Micropower chemical fuel-to-electric conversion : a "regenerative flip" hydrogen concentration cell promising near carnot efficiency.

    SciTech Connect (OSTI)

    Wally, Karl

    2006-05-01T23:59:59.000Z

    Although battery technology is relatively mature, power sources continue to impose serious limitations for small, portable, mobile, or remote applications. A potentially attractive alternative to batteries is chemical fuel-to-electric conversion. Chemical fuels have volumetric energy densities 4 to 10 times those of batteries. However, realizing this advantage requires efficient chemical fuel-to-electric conversion. Direct electrochemical conversion would be the ideal, but, for most fuels, is generally not within the state-of-the-science. Next best, chemical-to-thermal-to-electric conversion can be attractive if efficiencies can be kept high. This small investigative project was an exploration into the feasibility of a novel hybrid (i.e., thermal-electrochemical) micropower converter of high theoretical performance whose demonstration was thought to be within near-term reach. The system is comprised of a hydrogen concentration electrochemical cell with physically identical hydrogen electrodes as anode and cathode, with each electrode connected to physically identical hydride beds each containing the same low-enthalpy-of-formation metal hydride. In operation, electrical power is generated by a hydrogen concentration differential across the electrochemical cell. This differential is established via coordinated heating and passive cooling of the corresponding hydride source and sink. Heating is provided by the exothermic combustion (i.e., either flame combustion or catalytic combustion) of a chemical fuel. Upon hydride source depletion, the role of source and sink are reversed, heating and cooling reversed, electrodes commutatively reversed, cell operation reversed, while power delivery continues unchanged. This 'regenerative flip' of source and sink hydride beds can be cycled continuously until all available heating fuel is consumed. Electricity is efficiently generated electrochemically, but hydrogen is not consumed, rather the hydrogen is regeneratively cycled as an electrochemical 'working fluid'.

  10. Oxygen enriched combustion system performance study. Phase 2: 100 percent oxygen enriched combustion in regenerative glass melters, Final report

    SciTech Connect (OSTI)

    Tuson, G.B.; Kobayashi, H.; Campbell, M.J.

    1994-08-01T23:59:59.000Z

    The field test project described in this report was conducted to evaluate the energy and environmental performance of 100% oxygen enriched combustion (100% OEC) in regenerative glass melters. Additional objectives were to determine other impacts of 100% OEC on melter operation and glass quality, and to verify on a commercial scale that an on-site Pressure Swing Adsorption oxygen plant can reliably supply oxygen for glass melting with low electrical power consumption. The tests constituted Phase 2 of a cooperative project between the United States Department of Energy, and Praxair, Inc. Phase 1 of the project involved market and technical feasibility assessments of oxygen enriched combustion for a range of high temperature industrial heating applications. An assessment of oxygen supply options for these applications was also performed during Phase 1, which included performance evaluation of a pilot scale 1 ton per day PSA oxygen plant. Two regenerative container glass melters were converted to 100% OEC operation and served as host sites for Phase 2. A 75 ton per day end-fired melter at Carr-Lowrey Glass Company in Baltimore, Maryland, was temporarily converted to 100% OEC in mid- 1990. A 350 tpd cross-fired melter at Gallo Glass Company in Modesto, California was rebuilt for permanent commercial operation with 100% OEC in mid-1991. Initially, both of these melters were supplied with oxygen from liquid storage. Subsequently, in late 1992, a Pressure Swing Adsorption oxygen plant was installed at Gallo to supply oxygen for 100% OEC glass melting. The particular PSA plant design used at Gallo achieves maximum efficiency by cycling the adsorbent beds between pressurized and evacuated states, and is therefore referred to as a Vacuum/Pressure Swing Adsorption (VPSA) plant.

  11. Development and Verification for the Control Method Using Surplus Pressure of Primary Pumps in Chiller Plant Systems for Air Conditioning which Adopts Primary/Secondary Piping Systems PPT 

    E-Print Network [OSTI]

    Matsushita, N.; Fujimura, M.; Sumiyoshi, D.; Akashi, Y.

    2012-01-01T23:59:59.000Z

    and it acts as a regenerative brake. However, we think the potentials that the power is applied to the pump as a regenerative brake are extremely low because the discharge flow rate of primary pump is distributed to multiple secondary pumps. Through...

  12. Computer Aided Design Tool for Electric, Hybrid Electric and Plug-in Hybrid Electric Vehicles 

    E-Print Network [OSTI]

    Eskandari Halvaii, Ali

    2012-07-16T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 ix LIST OF TABLES TABLE Page I Average power with full and no regenerative braking for different drive cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 x LIST OF FIGURES FIGURE Page 1 Electric vehicle structure. A.... . . . . . . . . . . . . . . . . . . . 76 66 The power required to run the vehicle: instantaneous, average with and average without regenerative braking. . . . . . . . . . . . . 77 67 Engine operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 68 Power sent...

  13. An omni-directional design tool for series hybrid electric vehicle design 

    E-Print Network [OSTI]

    Shidore, Neeraj Shripad

    2005-02-17T23:59:59.000Z

    ??????????????????????????????.. 101 viii LIST OF TABLES P age Table 1: Average power with full and no regenerative braking for different drive cycles???????????????????????.???? 39 Table 2: Freedoms of the new design tool and possible... versus time................................. 25 11 Instantaneous power and average power with full and zero regenerative braking in some typical driving cycles ......................................................... 27 12 Variation...

  14. Controlling emissions from a black liquor fluidized bed evaporator (Copeland reactor) using a regenerative thermal oxidizer and a prefilter

    SciTech Connect (OSTI)

    Grzanka, R.

    1997-12-31T23:59:59.000Z

    This paper reports on an intriguing pilot project developed to control air emissions from a pulp mill. Testing is complete, and the results show favorable emissions reductions. Stone Container Corporation, REECO, NCASI, the Ohio DEP, and the US EPA, have all worked together and approved the installation of control equipment, for VOC and HAP emissions under Presumptive MACT, setting the standard for the Copeland Reactor process in a semi chem pulp mill. The equipment, once operational, will reduce VOC and CO emissions by greater than 90%. This installation will be done at one seventh the cost of the significant process modifications required to accomplish the same emission reduction. In addition, increased process operating efficiency will be achieved with the use of an energy recovery system. The process is a black liquor fluidized bed boiler, which is used to generate sodium carbonate from the black liquor. The vapor emissions were high in VOCs, CO and particulate. After much study and testing, a wet electrostatic precipitator was chosen as the filter system for particulate control, followed by a regenerative thermal oxidizer for VOC and HAP control, finally an air-to-air heat exchanger is being used to preheat the combustion air entering the process.

  15. Full Hybrid: Braking

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeIdle Reduction WeightRebate - LADWPPublicE85 RetailNREL

  16. UC Berkeley Community College Visit Day Friday, October 18, 2013

    E-Print Network [OSTI]

    California at Irvine, University of

    is to increase the efficiency of regenerative braking by increasing the power density of the hybrid system power density and efficiency for regenerative breaking and acceleration. Although flywheel energy motor, and mechanical flywheel) system that will have improved regenerative energy storage

  17. This is a 1D model of an active magnetic regenerative refrigerator (AMRR) that was developed in MATLAB. The model uses cycle inputs such as the fluid mass flow and

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    This is a 1D model of an active magnetic regenerative refrigerator (AMRR) that was developed of an Active Magnetic Regenerator Refrigerator 1. Governing Equations Figure 1 shows a schematic of an active in MATLAB. The model uses cycle inputs such as the fluid mass flow and magnetic field profiles, fluid

  18. Rate Schedule CV-T3 (Supersedes Schedules CV- T2) UNITED STATES...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    T3 (Supersedes Schedules CV- T2) UNITED STATES DEPARTMENT OF ENERGY WESTERN AREA POWER ADMINISTRATION CENTRAL VALLEY PROJECT SCHEDULE OF RATE FOR POINT-TO-POINT TRANSMISSION...

  19. Upper and lower limits on the Crab pulsar's astrophysical parameters set from gravitational wave observations by LIGO: braking index and energy considerations

    E-Print Network [OSTI]

    Giovanni Santostasi

    2008-07-16T23:59:59.000Z

    The Laser Interferometer Gravitational Observatory (LIGO) has recently reached the end of its fifth science run (S5), having collected more than a year worth of data. Analysis of the data is still ongoing but a positive detection of gravitational waves, while possible, is not realistically expected for most likely sources. This is particularly true for what concerns gravitational waves from known pulsars. In fact, even under the most optimistic (and not very realistic) assumption that all the pulsar's observed spin-down is due to gravitational waves, the gravitational wave strain at earth from all the known isolated pulsars (with the only notable exception of the Crab pulsar) would not be strong enough to be detectable by existing detectors. By August 2006, LIGO had produced enough data for a coherent integration capable to extract signal from noise that was weaker than the one expected from the Crab pulsar's spin-down limit. No signal was detected, but beating the spin-down limit is a considerable achievement for the LIGO Scientific Collaboration (LSC). It is customary to translate the upper limit on strain from a pulsar into a more astrophysically significant upper limit on ellipticity. Once the spin-down limit has been beaten, it is possible to release the constraint that all the spin-down is due to gravitational wave emission. A more complete model with diverse braking mechanisms can be used to set limits on several astrophysical parameters of the pulsar. This paper shows possible values of such parameters for the Crab pulsar given the current limit on gravitational waves from this neutron star.

  20. Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel

    E-Print Network [OSTI]

    Zhang, Xiaohua

    2011-02-22T23:59:59.000Z

    Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion analysis of a locomotive...

  1. Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel 

    E-Print Network [OSTI]

    Zhang, Xiaohua

    2011-02-22T23:59:59.000Z

    Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion ...

  2. Transportation and its Infrastructure

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    system for international aviation, Study carried out for ICAO, London, UK IEA Hybrid, 2006: International Energysystems, store regenerative braking energy and to operate the powerful motor drives needed for hybrid

  3. Regenerative Heater Optimization for Steam Turbo-Generation Cycles of Generation IV Nuclear Power Plants with a Comparison of Two Concepts for the Westinghouse International Reactor Innovative and Secure (IRIS)

    SciTech Connect (OSTI)

    Williams, W.C.

    2002-08-01T23:59:59.000Z

    The intent of this study is to discuss some of the many factors involved in the development of the design and layout of a steam turbo-generation unit as part of a modular Generation IV nuclear power plant. Of the many factors involved in the design and layout, this research will cover feed water system layout and optimization issues. The research is arranged in hopes that it can be generalized to any Generation IV system which uses a steam powered turbo-generation unit. The research is done using the ORCENT-II heat balance codes and the Salisbury methodology to be reviewed herein. The Salisbury methodology is used on an original cycle design by Famiani for the Westinghouse IRIS and the effects due to parameter variation are studied. The vital parameters of the Salisbury methodology are the incremental heater surface capital cost (S) in $/ft{sup 2}, the value of incremental power (I) in $/kW, and the overall heat transfer coefficient (U) in Btu/ft{sup 2}-degrees Fahrenheit-hr. Each is varied in order to determine the effects on the cycles overall heat rate, output, as well as, the heater surface areas. The effects of each are shown. Then the methodology is then used to compare the optimized original Famiani design consisting of seven regenerative feedwater heaters with an optimized new cycle concept, INRC8, containing four regenerative heaters. The results are shown. It can be seen that a trade between the complexity of the seven stage regenerative Famiani cycle and the simplicity of the INRC8 cycle can be made. It is desired that this methodology can be used to show the ability to evaluate modularity through the value of size a complexity of the system as well as the performance. It also shows the effectiveness of the Salisbury methodology in the optimization of regenerative cycles for such an evaluation.

  4. Development and application of an advanced switched reluctance generator drive 

    E-Print Network [OSTI]

    Asadi, Peyman

    2009-05-15T23:59:59.000Z

    change the cost and overall system efficiency. Therefore, power density maximization is one of the primary design objectives. Regenerative braking is the principle means through which kinetic energy of the vehicle is returned to the electric energy... by its regenerative braking characteristics rather than its motoring operation characteristics. This concludes the importance of power density maximization for generators in hybrid electric vehicles. According to the US DOE?s Partnership for a New...

  5. Development of a He{sup 3}?He{sup 4} sub Kelvin active magnetic regenerative refrigerator (AMRR) with no moving parts

    SciTech Connect (OSTI)

    Jahromi, A. E. [Ph.D. student, University of Wisconsin -1500 Engineering Drive, 1335 ERB, Madison, WI, 53706 (United States); Miller, F. K. [Assistant Professor of Mechanical Engineering, University of Wisconsin - 1500 Engineering Drive, 1341 ERB Madison, WI 53706 (United States)

    2014-01-29T23:59:59.000Z

    Current state of the art particle and photon detectors such as Transition Edge Sensors (TES) and Microwave Kinetic Inductance Detectors (MKID) use large arrays of sensors or detectors for space science missions. As the size of these space science detectors increases, future astrophysics missions will require sub-Kelvin cooling over larger areas. This leads to not only increased cooling power requirements, but also a requirement for distributed sub-Kelvin cooling. We propose an active Magnetic Regenerative Refrigerator (AMRR) that uses a Superfluid Magnetic Pump (SMP) to circulate liquid He{sup 3}?He{sup 4} through a magnetic regenerator to provide the necessary cooling at sub-Kelvin temperatures. Such system will be capable of distributing the cooling load to a relatively large array of objects. One advantage of using a fluid for heat transfer in such systems is to isolate components such as the superconducting magnets from detectors that are sensitive to magnetic fields. Another advantage of the proposed tandem AMRR is that it does not need Gas Gap Heat Switches (GGHS) to transfer heat during various stages of the magnetic cooling. Our proposed system consists of four superconducting magnets, one superleak, and three heat exchangers. It will operate continuously with no moving parts and it will be capable of providing the necessary cooling at sub-Kelvin temperatures for future space science applications.

  6. Svendborg Brakes | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDITCalifornia Sector:Shrenik IndustriesState of

  7. Regenerative Boiler Feedwater Heater Economics

    E-Print Network [OSTI]

    Viar, W. L.

    O- REFEREWCE (,\\SI:: J CURRENT CASE I CHANGE INCR or DEeR 7JTAL FUEL M 10?E. BTU/HR 842.44 827. 9~ -14.50 .i) .. ft!::.::r COUPLED SHAFT P()I,oIER 8HP 4700 4700 0 TuTAl ELECTRICAL GENERATION 8AC... PRESSURE TURBINES CONDENSING TURBI HES 5TE...

  8. Verification tests of the U. S. Electricar Corporation Lectric Leopard. Technical report 3 Aug-25 Sep 81

    SciTech Connect (OSTI)

    Dowgiallo, E.J. Jr; Snellings, I.R.; Chapman, R.D.

    1982-04-01T23:59:59.000Z

    The Lectric Leopard manufactured by U.S. Electricar Corporation was tested at MERADCOM as part of the Department of Energy project to verify conformity to performance standards of electric vehicles. The Leopard is a standard Fiat Strada sedan which has been converted to an electric vehicle. It is powered by 16 6-V batteries through a silicon-controlled rectifier (SCR) Controller to a 23-hp series-wound d.c. motor. It is equipped with a five-speed manual transmission, power-assisted disc brakes in the front and drum brakes in the rear. It is not equipped with regenerative braking.

  9. Performance Evaluation of a Cascaded H-Bridge Multi Level Inverter Fed BLDC Motor Drive in an Electric Vehicle 

    E-Print Network [OSTI]

    Emani, Sriram S.

    2011-08-08T23:59:59.000Z

    -emf ................................................................................................. 77 6.8 Regenerative Capability of the Implemented System ....................................... 78 6.9 Fault Analysis .................................................................................................... 79 6.10 Fault Diagnostics... follow the reference drive cycle. e) To evaluate the performance of the batteries during charge and recharge cycles, especially during regeneration which is achieved through the electrical braking. 1.5 Demand for Electric Vehicles In a popular...

  10. Energy Management System for an Hybrid Electric Vehicle, Using Ultracapacitors and Neural Networks

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    Energy Management System for an Hybrid Electric Vehicle, Using Ultracapacitors and Neural Networks and specific energy contained in most electric batteries compared to that of gasoline, is resolved in hybrid to accept energy from regenerative braking. For this reason, hybrid systems use an auxiliary energy system

  11. Peak Power Bi-directional Transfer From High Speed Flywheel to Electrical Regulated Bus Voltage System

    E-Print Network [OSTI]

    Szabados, Barna

    life cycle. A reduced life cycle will translate into high maintenance costs since the batteries have devices capable of a minimum power of 400 W/kg, energy of 200 Wh/kg, a life cycle of 2500 at a cost vehicle during both acceleration and regenerative braking. The life cycle of the electric vehicle

  12. THE BLIND SIMULATION PROBLEM and REGENERATIVE PROCESSES

    E-Print Network [OSTI]

    Bucklew, James Antonio

    Processes 1 #12; 1 Introduction 1.1 Simulation and importance sampling Large and/or nonlinear stochastic on the order of 10 \\Gamma6 are quite common in stochastic systems. It is clear that a direct simulation(Z i ): The ratio p(\\Delta)=q(\\Delta) will be called the weight function of the importance sam

  13. European Doctoral Academy in Regenerative Engineering

    E-Print Network [OSTI]

    Cesare, Bernardo

    project that is placed along the inter- sectorial innovation pipeline of a number of tissue engineering products and technologies, addressing the clinical needs of cardiac valve repair and replacement technologies. Full descriptions of the research projects available can be found at www

  14. Materials Science Tools for Regenerative Medicine

    E-Print Network [OSTI]

    Richardson, Wade N

    2013-01-01T23:59:59.000Z

    with a 40 µm nylon mesh strainer (BD Falcon) to removecentrifuging in a 100 µm mesh strainer then placed on ice.

  15. Project Profile: Regenerative Carbonate-Based Thermochemical...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    design of an advanced heat-exchange reactor system, evaluation of the optimized pellets in a simulated bench-scale TCES system over multiple cycles, and Aspen modeling and...

  16. New Regenerative Cycle for Vapor Compression Refrigeration

    SciTech Connect (OSTI)

    Bergander, Mark J [Magnetic Development, Inc.; Butrymowicz, Dariusz [Polish Academy of Scinces

    2010-01-26T23:59:59.000Z

    This project was a continuation of Category 1 project, completed in August 2005. Following the successful bench model demonstration of the technical feasibility and economic viability, the main objective in this stage was to fabricate the prototype of the heat pump, working on the new thermodynamic cycle. This required further research to increase the system efficiency to the level consistent with theoretical analysis of the cycle. Another group of objectives was to provide the foundation for commercialization and included documentation of the manufacturing process, preparing the business plan, organizing sales network and raising the private capital necessary to acquire production facilities.

  17. Apparatus for regenerative heating of diesel fuel

    SciTech Connect (OSTI)

    Leary, D.F.; Olds, R.N.

    1987-03-17T23:59:59.000Z

    This patent describes an apparatus for heating diesel fuel before it is filtered and for transferring heat from filtered diesel fuel to diesel fuel to be filtered, the apparatus comprising means for removably securing it between a fuel manifold and a fuel filter of a fuel supply system of a diesel-engined vehicle. The apparatus comprises: (1) an electric heater; (2) means for connecting the heater to a power supply; and (3) a housing which comprises: a heat-exchange chamber having a heat-exchange member therein and having a first entry port for the entry of filtered diesel fuel from a fuel filter when the apparatus is secured to a fuel filter, and a first exit port for the exit of fuel to a fuel manifold when the apparatus is secured to a fuel manifold; the first entry and exit ports defining a first passage therebetween on one side of the heat exchange member. The heat exchange member has a second entry port for entry of diesel fuel from a fuel manifold when the apparatus is secured to a fuel manifold and having a second exit port for the exit of fuel to a heating chamber. The second entry and exit ports define a second passage on the other side of the heat-exchange member so that heat from the first passage can be transferred to the second passage through the heat-exchange member; and a heating chamber having a heating chamber entry port for the entry of diesel fuel from the second exit port of the heat exchange means and a heating chamber exit port for the exit of diesel fuel to a filter when the apparatus is secured to a fuel filter.

  18. Regen Powertech Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDITCalifornia Sector: Wind energy Product:AnatoliaRefex Energy Jump

  19. dry-regen | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4 Self-Scrubbing:,, , ., ..., ,+ .-detonation7 ComparisonDry Regenerable

  20. Carex atlantica subsp. subsp. capillacea (Native) 

    E-Print Network [OSTI]

    Albert Perdeck

    2011-08-10T23:59:59.000Z

    , and speed will usually have a higher efficiency than the same turbine oper ated with one or more of these parameters substantially at variance with design. Note, however, that for a given turbine, overall steam rate (pounds of steam per brake... for many years in utility steam electric generating stations. This is the regenerative feed preheat cycle. It increases the amount of valid steam demand on intermediate pressure steam headers, thus, increas ing the amount of low cost, high value power...

  1. A pressure control scheme for air brakes in commercial vehicles

    E-Print Network [OSTI]

    Bowlin, Christopher Leland

    2007-04-25T23:59:59.000Z

    area of the valve opening is given by [ ] -? )1 ,, tdesbmeasbp l . (16) Let us now derive the relationship between Ap and xpp. During the apply phase - -= phase phasetA pp pt p )]([2 ])( p p (17) where rpv is the external... -105.8624 K3 7775.944 N/m rpv 0.01283 m xpt 0.002286 m rpp 0.01232 m m1 222831.478 N/m b1 104.9995 N m2 404767.9763 N/m b2 -689.8448 N m4 3264026.266 N/m b4 14433.1506 N a1 2736268733 N/m2 r1 0.004369 m a2 -966886378.6 N/m r2...

  2. Compression Braking for Longitudinal Control of Commercial Heavy Vehicles

    E-Print Network [OSTI]

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

    2001-01-01T23:59:59.000Z

    J/sec) lower heating value for diesel fuel (J/kg) crankthe lower heating value of light duty diesel fuel Qihv I n

  3. antilock brake systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Engineering Vol. 1, Number 2, June 2011 Engineering Websites Summary: of an electric or hybrid electric vehicle can be easily controlled to function as a generator, converting...

  4. Modeling of air brakes for onboard diagnostics of heavy trucks

    E-Print Network [OSTI]

    Kankanala, Penchala N

    2000-01-01T23:59:59.000Z

    Accidents involving commercial vehicles have disastrous consequences; most of the times they result in human fatalities, environmental damage, traffic congestion leading to fuel wastage and associated productivity losses. Moreover, with the rapid...

  5. auxiliary brakes: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is modified to increase the productivity. The new fixture design is carried out by using CATIA V5 modeling software and it is critically evaluated for the failure of piston rod...

  6. air brakes: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    3. AIR TO AIR COMMUNICATION...3 4. SIMULATIONS Jain, Raj 203 Oil and Gas Air Heaters Texas A&M University - TxSpace Summary: Most conventional air...

  7. ORNL/Pub40701 Heavy and Overweight Vehicle Brake

    E-Print Network [OSTI]

    , and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

  8. aircraft braking system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is to develop a thermoelastic Haviland, David 174 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  9. Global chassis control using braking and suspension systems P. Gaspar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Poussot-Vassal , O. Sename , L. Dugard *Computer and Automation Research Institute, Hungary **Laboratoire active control mechanisms are applied in road vehicles to solve different control tasks, see e.g. [1,5,6,7]. As an example, the suspension system is the main tool to achieve comfort and road holding for a vehicle whilst

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

    DOE Patents [OSTI]

    Murty, Balarama Vempaty (West Bloomfield, MI)

    2000-01-01T23:59:59.000Z

    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.

  11. Empty sky : 9/11 and performing regenerative violence

    E-Print Network [OSTI]

    Genna, Raimondo

    2010-01-01T23:59:59.000Z

    New York: Hill and Wang, 1981. Bartsch, Shadi. Actors in theis reminiscent of Shadi Bartsch’s analysis of Nero in heras a tragic actor, Bartsch notes that Nero’s choice of

  12. Acoustic velocity measurements in materials using a regenerative method

    DOE Patents [OSTI]

    Laine, Edwin F. (Alamo, CA)

    1986-01-01T23:59:59.000Z

    Acoustic energy is propagated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.

  13. Acoustic-velocity measurements in materials using a regenerative method

    DOE Patents [OSTI]

    Laine, E.F.

    1982-09-30T23:59:59.000Z

    Acoustic energy is propatated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.

  14. Energy-efficient regenerative liquid desiccant drying process

    DOE Patents [OSTI]

    Ko, Suk M. (Huntsville, AL); Grodzka, Philomena G. (Huntsville, AL); McCormick, Paul O. (Athens, AL)

    1980-01-01T23:59:59.000Z

    This invention relates to the use of desiccants in conjunction with an open oop drying cycle and a closed loop drying cycle to reclaim the energy expended in vaporizing moisture in harvested crops. In the closed loop cycle, the drying air is brought into contact with a desiccant after it exits the crop drying bin. Water vapor in the moist air is absorbed by the desiccant, thus reducing the relative humidity of the air. The air is then heated by the used desiccant and returned to the crop bin. During the open loop drying cycle the used desiccant is heated (either fossil or solar energy heat sources may be used) and regenerated at high temperature, driving water vapor from the desiccant. This water vapor is condensed and used to preheat the dilute (wet) desiccant before heat is added from the external source (fossil or solar). The latent heat of vaporization of the moisture removed from the desiccant is reclaimed in this manner. The sensible heat of the regenerated desiccant is utilized in the open loop drying cycle. Also, closed cycle operation implies that no net energy is expended in heating drying air.

  15. Development of Supported Bifunctional Electrocatalysts for Unitized Regenerative Fuel Cells

    E-Print Network [OSTI]

    water and electrical energy in the same dual mode system.1 Although URFCs are an appealing technology and the support, and a substantial increase in catalyst utilization was observed, even though the support surface gradually decreases, and the decrease is attributed to loss of electronic conductivity. Ebonex and Ti4O7

  16. The mission of the UW Stem Cell and Regenerative Medi-

    E-Print Network [OSTI]

    Featured Researcher: Qiang Chang 2 Year-in-Review 5 SSSCR News 6 Fellowships Available 7 CampusSC LabTuesdayevery month during the academic year. Joseph Wu, assistant professor of medicine and #12;2 SCRMCNotes Qiang about the ideas that inspired him years ago. "I was interested in how the brain works," he said

  17. USDA Awards Nearly $2 Million for First Phase of Regenerative...

    Energy Savers [EERE]

    newly designated Promise Zones by the Obama Administration. Promise Zones are high-poverty communities where the federal government partners with local leaders to increase...

  18. Regenerative processes in a radio-frequency Josephson interferometer

    SciTech Connect (OSTI)

    Gusev, A.V.; Rudenko, V.N.

    1985-01-01T23:59:59.000Z

    Phase modulation of rf oscillations in a Josephson interferometer with hysteresis is described theoretically outside the plateau in the voltage-current characteristic. A generalized phenomenological model is developed for the magnetic flux quantum jumps in interferometers which treats the phase change produced by external perturbations and fluctuations. The forced oscillations become unstable when the coupling between the interferometer loop and the pumping channel reaches a certain value. The application of this instability to maximizing the sensitivity of quantum rf interferometers (so that the sensitivity is limited only by the constraints imposed by fluctuations in the Josephson contact) is discussed.

  19. Low-pressure-ratio regenerative exhaust-heated gas turbine

    SciTech Connect (OSTI)

    Tampe, L.A.; Frenkel, R.G.; Kowalick, D.J.; Nahatis, H.M.; Silverstein, S.M.; Wilson, D.G.

    1991-01-01T23:59:59.000Z

    A design study of coal-burning gas-turbine engines using the exhaust-heated cycle and state-of-the-art components has been completed. In addition, some initial experiments on a type of rotary ceramic-matrix regenerator that would be used to transfer heat from the products of coal combustion in the hot turbine exhaust to the cool compressed air have been conducted. Highly favorable results have been obtained on all aspects on which definite conclusions could be drawn.

  20. Empty sky : 9/11 and performing regenerative violence

    E-Print Network [OSTI]

    Genna, Raimondo

    2010-01-01T23:59:59.000Z

    Independence Day. Dir. Roland Emmerich. Perf. Will Smith,a conjuring of Roland Emmerich’s film Independence Day. Inresemblance. It is as though Emmerich had directed Bush’s

  1. active magnetic regenerative: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    by this sensor synchronized with the electric activity of the electrocardiogram (ECG). The shape of the magnetic wave was largely altered by shifting the sensor position...

  2. Empty sky : 9/11 and performing regenerative violence

    E-Print Network [OSTI]

    Genna, Raimondo

    2010-01-01T23:59:59.000Z

    accomplishments, “probie” Jimmy’ s eulogy rests on examining23) as he begins rhetorically to shape Jimmy’s death mask.of knowledge concerning Jimmy, limited to Jimmy’s having a

  3. Maass Regenerative Energien GmbH founders | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther, Oklahoma:EnergyECO AugerMaan Development Company JumpMaass

  4. Regenerative Energie Systeme RegEnSys | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form History Facebook

  5. Project Profile: Regenerative Carbonate-Based Thermochemical Energy Storage

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of ContaminationHubs+ ReportEnergy National Solar Thermal TestSolar PowerTrough

  6. Maass Regenerative Energien GmbH | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLu an Group Jump to: navigation,LushuiLyme,MDLMPMX Group SpA

  7. Regenerative Fuel Cells for Energy Storage | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of ContaminationHubs+18,new2004_v1.3_5.0.zipFlorida4 U.S.Department

  8. JOURNAL OF TISSUE ENGINEERING AND REGENERATIVE MEDICINE RESEARCH ARTICLE J Tissue Eng Regen Med 2008; 2: 340346.

    E-Print Network [OSTI]

    Waldman, Stephen D.

    @me.queensu.ca little of the pyruvate enters the citric acid cycle (aerobic pathway), the majority of the pyruvate, available glucose is rapidly converted to pyruvate, generating ATP. As very *Correspondence to: Stephen D is then converted to lactic acid by lactate dehydrogenase and NADH (Miller et al., 1989). Since the yield of ATP

  9. Tradeoff Between Powertrain Complexity and Fuel Efficiency

    Broader source: Energy.gov (indexed) [DOE]

    right wheels. Series - Engine Operates Independently - + Continuously Variable (CVT) Operation, - + Unlimited Transmission Speed Ratio Parallel - Mechanical Path Through -...

  10. Method for controlling a motor vehicle powertrain

    DOE Patents [OSTI]

    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

    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.

  11. Method for controlling a motor vehicle powertrain

    DOE Patents [OSTI]

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

    1990-05-22T23:59:59.000Z

    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.

  12. Computer controlled synchronous shifting of an automatic transmission

    DOE Patents [OSTI]

    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

    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.

  13. Computer controllable synchronous shifting of an automatic transmission

    DOE Patents [OSTI]

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

    1989-08-08T23:59:59.000Z

    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.

  14. ALTERNATE POWER AND ENERGY STORAGE/REUSE FOR DRILLING RIGS: REDUCED COST AND LOWER EMISSIONS PROVIDE LOWER FOOTPRINT FOR DRILLING OPERATIONS 

    E-Print Network [OSTI]

    Verma, Ankit

    2010-07-14T23:59:59.000Z

    Hz, 3000 KVA. Two transformers convert this into 690 V, 60 Hz and feed it to the invertors which then convert it into DC and supply to the main bus where all major consumers are mounted. Regenerated power is dissipated in the brake resistors... to be a better version of LOC-250. Also this is one of the reasons why there is no efficiency loss in LOC-400 when converting the regenerative power from hydraulic to mechanical and then electrical which is the case with LOC-250. The single line diagram...

  15. Converting a Motorcycle to Electric Power

    E-Print Network [OSTI]

    Simcoe, Christopher M.

    2009-12-18T23:59:59.000Z

    horsepower. The top speed is 60-70 mph which is adjustable by the sprocket gearing that is chosen. Its range is claimed to be 35-60 miles,depending on how you ride, via a 3.3 kilowatt-hour lithium battery pack. The battery pack can be recharged... of the bike’s parameters. Performance comes from a liquid-cooled, 3-phase AC (Alternating Current) induction motor and a proprietary high energy lithium-ion battery pack plus adjustable regenerative braking to capture wasted energy for battery recharging...

  16. Prestressed elastomer for energy storage

    DOE Patents [OSTI]

    Hoppie, Lyle O. (Birmingham, MI); Speranza, Donald (Canton, MI)

    1982-01-01T23:59:59.000Z

    Disclosed is a regenerative braking device for an automotive vehicle. The device includes a power isolating assembly (14), an infinitely variable transmission (20) interconnecting an input shaft (16) with an output shaft (18), and an energy storage assembly (22). The storage assembly includes a plurality of elastomeric rods (44, 46) mounted for rotation and connected in series between the input and output shafts. The elastomeric rods are prestressed along their rotational or longitudinal axes to inhibit buckling of the rods due to torsional stressing of the rods in response to relative rotation of the input and output shafts.

  17. Double acting stirling engine phase control

    DOE Patents [OSTI]

    Berchowitz, David M. (Scotia, NY)

    1983-01-01T23:59:59.000Z

    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.

  18. Arsenic species and leachability in the fronds of the hyperaccumulator Chinese brake (Pteris vittata L.)

    E-Print Network [OSTI]

    Ma, Lena

    coupled with atomic fluorescence spectrometry. The impacts of air-drying on arsenic species Science Ltd. doi:10.1016/S0269-7491(02)00470-0 Enviro

  19. Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine 

    E-Print Network [OSTI]

    Kroeger, Timothy H

    2013-09-19T23:59:59.000Z

    , revealing the premixed and diffusion burn fractions as well as important engine and exhaust design criteria such as maximum in-cylinder pressure and exhaust composition. These results are significant in diesel engine design because cheaper, lighter engines...

  20. Combined fast valving and braking resistor application to improve transient stability

    E-Print Network [OSTI]

    Chen, Jen-Yeu Thomas

    1982-01-01T23:59:59.000Z

    power input to the turbogenerator is measured with a reheater pressure transducer and the electrica1 power output from the generator is measured with a kw transducer. When the 10 0 V 0 C4 4 0) f-4 H m Cd . A ) N Cd VII &D '0 (U Ctd cd cdm OE...

  1. Design considerations for an automotive magnetorheological brake Kerem Karakoc, Edward J. Park *, Afzal Suleman

    E-Print Network [OSTI]

    Park, Edward

    , Victoria, BC, Canada V8W 3P6 a r t i c l e i n f o Article history: Received 10 October 2007 Accepted 22 in automobiles. In other words, the traditional mechanical systems are being re- placed by improved

  2. Wann and Wilkie Steering with an eye to braking Under Submission 1

    E-Print Network [OSTI]

    Royal Holloway, University of London

    visual direction information increases during walking3 and high speed steering1 . Models of Steering Control In order to quantify the combination of this information, mathematical models have been used such a model that steers to the target attractor whilst negotiating a series of obstacles (which are treated

  3. Modeling the pneumatic subsystem of a S-cam air brake system

    E-Print Network [OSTI]

    Coimbatore Subramanian, Shankar

    2004-09-30T23:59:59.000Z

    pirpvxpv during the apply phase 2pirppxppe during the exhaust phase (4.51) where rpv is the external radius of the primary valve assembly inlet section and rpp is the 27 external radius of the primary piston exhaust seat. Next, let us consider the mass...

  4. Combined fast valving and braking resistor application to improve transient stability 

    E-Print Network [OSTI]

    Chen, Jen-Yeu Thomas

    1982-01-01T23:59:59.000Z

    would result in boiler safety valve operation which might require temporary plant shutdown for the reseating of these valves. The closing and opening of the control valve will sub]ect the boiler control to rather drastic action, and careful analysis...

  5. Pneumatic brake control for precision stopping of heavy-duty vehicles

    E-Print Network [OSTI]

    Bu, Fanping; Tan, Han-Shue

    2007-01-01T23:59:59.000Z

    6], heavy-duty vehicle maintenance automation, as well astrue” automation are applications on heavy-duty vehicles [

  6. anti-lock braking system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Engineering Vol. 1, Number 2, June 2011 Engineering Websites Summary: of an electric or hybrid electric vehicle can be easily controlled to function as a generator, converting...

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

    E-Print Network [OSTI]

    Domond, Kenneth

    2010-01-01T23:59:59.000Z

    An Introduction to the Conjugate Gradient Method Without thedescent method and the conjugate gradient method. The onlymethod and the conjugate gradient method can be found in

  8. Experimental Evaluation of Time-redundant Execution for a Brake-by-wire Application

    E-Print Network [OSTI]

    Karlsson, Johan

    faults is to use time-redundancy [3, 4, 5, 6]. The declining prices of high-performance microprocessors error masking. The real-time kernel uses fixed priority scheduling to control temporal error masking

  9. ORNL/TTG/BWPT/PVS/Rev5 Performance-Based Brake Tester

    E-Print Network [OSTI]

    , and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

  10. ORNL/TM-2011/479 Real-Time Dynamic Brake Assessment

    E-Print Network [OSTI]

    , and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

  11. A molecular brake, not a clutch, stops the Rhodobacter sphaeroides flagellar motor

    E-Print Network [OSTI]

    Berry, Richard

    conformational changes that result in a different rotor-stator inter- face, resulting in rotation the output of molecular motors is critical for many cellular processes governing cell growth, division peptidoglycan-bound stator complexes, down an electrochemical gradient into the cytoplasm, is responsible

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

    E-Print Network [OSTI]

    McLean, James Elliott

    2011-10-21T23:59:59.000Z

    allow for the calculation of the mixture internal energy. The last term, heat transfer , is calculated using a simple heat transfer model. (8) 24 The trapped mass is known, and the cylinder geometry allows...

  13. Abstract Arsenic hyperaccumulator Pteris vittata L. (Chinese brake fern) grows well in arsenic-contami-

    E-Print Network [OSTI]

    Ma, Lena

    and plated on medium containing 4 mM of arsenate, a common form of arsenic in the environment. The deduced ubiquitous in the environment. It is present both as arsenite (AsIII) and arsenate (AsV) in the environment

  14. Fault diagnostics in power electronics-based brake-by-wire systems

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    in depth. Fault diagnostics technology for internal combustion engine vehicles has been well investigated and validated using data from both a simulation and a laboratory set-up with a 1=3 hp d.c. motor and a d and the results are presented. The hierarchical fuzzy diagnostic system trained on the simulated model has

  15. Daimler's SuperTruck Program; 50% Brake Thermal Efficiency | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197 This work was performed under0, 2012Training

  16. 2011 Chevrolte Volt - VIN 0815 - Advanced Vehicle Testing - Baseline...

    Broader source: Energy.gov (indexed) [DOE]

    the ESS or other conversion materials. (11) The vehicle may utilize a single-speed, multi-speed automatic, manual transmission, or a Continuously Variable Transmission (CVT), and...

  17. 2013 Chevrolte Volt - VIN 3929 - Advanced Vehicle Testing - Baseline...

    Broader source: Energy.gov (indexed) [DOE]

    the ESS or other conversion materials. (11) The vehicle may utilize a single-speed, multi-speed automatic, manual transmission, or a Continuously Variable Transmission (CVT), and...

  18. 2013 Chevrolet Malibu ECO Advanced Vehicle Testing - Baseline...

    Broader source: Energy.gov (indexed) [DOE]

    the ESS or other conversion materials. (11) The vehicle may utilize a single-speed, multi-speed automatic, manual transmission, or a Continuously Variable Transmission (CVT), and...

  19. Tissue engineering the anterior cruciate ligament : a regenerative medicine approach in orthopaedic surgery

    E-Print Network [OSTI]

    Canseco, José Antoni

    2013-01-01T23:59:59.000Z

    Anterior cruciate ligament (ACL) injuries affect over 200,000 Americans yearly, and many occur in young athletes. Current treatment options include tendon autografts and cadaveric allografts. However, these approaches often ...

  20. Processing and characterization of multi-cellular monolithic bioceramics for bone regenerative scaffolds

    SciTech Connect (OSTI)

    Ari-Wahjoedi, Bambang, E-mail: bambang-ariwahjoedi@petronas.com.my [Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Darul Ridzuan (Malaysia); Centre for Intelligent Signal and Imaging Research, Universiti Teknologi PETRONAS, Bandar Seri Iskandar (Malaysia); Ginta, Turnad Lenggo [Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Darul Ridzuan (Malaysia); Centre for Intelligent Signal and Imaging Research, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tro (Malaysia); Parman, Setyamartana [Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Darul Ridzuan (Malaysia); Abustaman, Mohd Zikri Ahmad [Kebabangan Petroleum Operating Company Sdn Bhd, Lvl. 52, Tower 2, PETRONAS Twin Towers, KLCC, 50088 Kuala Lumpur (Malaysia)

    2014-10-24T23:59:59.000Z

    Multicellular monolithic ceramic body is a ceramic material which has many gas or liquid passages partitioned by thin walls throughout the bulk material. There are many currently known advanced industrial applications of multicellular ceramics structures i.e. as supports for various catalysts, electrode support structure for solid oxide fuel cells, refractories, electric/electronic materials, aerospace vehicle re-entry heat shields and biomaterials for dental as well as orthopaedic implants by naming only a few. Multicellular ceramic bodies are usually made of ceramic phases such as mullite, cordierite, aluminum titanate or pure oxides such as silica, zirconia and alumina. What make alumina ceramics is excellent for the above functions are the intrinsic properties of alumina which are hard, wear resistant, excellent dielectric properties, resists strong acid and alkali attacks at elevated temperatures, good thermal conductivities, high strength and stiffness as well as biocompatible. In this work the processing technology leading to truly multicellular monolithic alumina ceramic bodies and their characterization are reported. Ceramic slip with 66 wt.% solid loading was found to be optimum as impregnant to the polyurethane foam template. Mullitic ceramic composite of alumina-sodium alumino disilicate-Leucite-like phases with bulk and true densities of 0.852 and 1.241 g cm{sup ?3} respectively, pore linear density of ±35 cm{sup ?1}, linear and bulk volume shrinkages of 7-16% and 32 vol.% were obtained. The compressive strength and elastic modulus of the bioceramics are ?0.5-1.0 and ?20 MPa respectively.

  1. Effects of Regulated Water Flows on Regen-eration of Fremont Cottonwood

    E-Print Network [OSTI]

    -long dam and reservoir system designed to provide water and hydroelectric power to the greater Phoenix

  2. Activation of the retina's regenerative potential by embryonic stem cell-derived microvesicles

    E-Print Network [OSTI]

    Katsman, Diana

    2012-01-01T23:59:59.000Z

    Significantly represented within 4394 mRNA targets of miRNAsmiRecords, and Targetscan. 4394 mRNAs were identified assigni?cantly represented within 4394 mRNA targets of miRNAs

  3. Trade-off Analysis of Regenerative Power Source for Long Duration Loitering Airship

    E-Print Network [OSTI]

    : photovoltaic flat panels, thin film photovoltaic panels, trough solar concentrators, Stirling dish solar by their excessive drag. Flat solar technologies (i.e. thin film, LSC, and flat panel PV) are ranked the highest, the airship needs a reliable, low-weight, renewable power generation system. This analysis is focused on solar

  4. A New Absorption Cycle: The Single-Effect Regenerative Absoprtion Refrigeration Cycle

    E-Print Network [OSTI]

    Dao, K.

    2011-01-01T23:59:59.000Z

    When E is a generation process, it starts IV and ends atIV represent the main reference stations where the processes start or end. Vapor generation

  5. The Topographic Imagination: Kerouac, Regener, Kafka and the Quest for Self-Realization

    E-Print Network [OSTI]

    Backman, Donald Eugene

    2012-01-01T23:59:59.000Z

    der  Türhüter  beiseite  tritt,  bückt  sich  der  Mann,  he   replied,   “Das   tritt…nach   meiner   Kenntnis  

  6. An analysis of the regenerative expansion cycle in multi-component hydrocarbon separation systems

    E-Print Network [OSTI]

    Horton, John Leroy

    1966-01-01T23:59:59.000Z

    absolute zero if the equip- ment is perfectly insulated and the amount of heat transfer surface is infinitely large. 5~~~%IIIIN(@Ni5@RAI)5@$5 IWW&~ 55SRINKa'RNSQRINSF)WJL%fOE& IMMMm y&~'~8?NMi&lKSSIKSAINF~ ILRRRF' ', IflF+RF)ISNi%IFkKAF4%:. , NJ NN&NRF... T X (d+g) T + T?(~ ~g) T dTm~zdl (TxTz) dT ~ dl [(Ot +Q) T i Y?- (Ol Jg) 7 - T] z dl % L y ln c z dT 1) Tz t Tx " (4++) T 1 1 [(al tg- 1) 7 + T? xl (aL )g) T 3 when L = 0 T = T 1 Tz = Tz 1 0 = ln (~t g- 1) T t T?- (4++) T zl xl zl c...

  7. A study of the effect of variable speed machining on regenerative chatter in end milling

    E-Print Network [OSTI]

    Dhayalan, Arun Kumar

    2000-01-01T23:59:59.000Z

    and format of the ASME Journal of Manufacturing Science and Engineering. However it has been observed that the increase in MRR is not usually limited by the power of the machine tool but by the onset of severe vibrations, namely chatter (Taylor, 1907...), Sridar (1968), Fu (1984), Minis (1990), Altintas (1995), and others. These investigators have attributed the source of this self-excited vibration to the regeneration of waviness on the workpiece. Figure 3 illustrates the regeneration effect m milling...

  8. REGENERATIVE STORMWATER CONVEYANCE (RSC) AS AN INTEGRATED APPROACH TO SUSTAINABLE STORMWATER PLANNING ON LINEAR PROJECTS

    E-Print Network [OSTI]

    Berg, Joe; Underwood, Keith

    2009-01-01T23:59:59.000Z

    technique of using stream restoration techniques to create auses elements of stream restoration, riffle grade control

  9. Carbon Capture by a Continuous, Regenerative Ammonia-Based Scrubbing Process

    SciTech Connect (OSTI)

    Resnik, K.P.; Yeh, J.T.; Pennline, H.W.

    2006-10-01T23:59:59.000Z

    Overview: To develop a knowledge/data base to determine whether an ammonia-based scrubbing process is a viable regenerable-capture technique that can simultaneously remove carbon dioxide, sulfur dioxide, nitric oxides, and trace pollutants from flue gas.

  10. Low-pressure-ratio regenerative exhaust-heated gas turbine. Final report

    SciTech Connect (OSTI)

    Tampe, L.A.; Frenkel, R.G.; Kowalick, D.J.; Nahatis, H.M.; Silverstein, S.M.; Wilson, D.G.

    1991-01-01T23:59:59.000Z

    A design study of coal-burning gas-turbine engines using the exhaust-heated cycle and state-of-the-art components has been completed. In addition, some initial experiments on a type of rotary ceramic-matrix regenerator that would be used to transfer heat from the products of coal combustion in the hot turbine exhaust to the cool compressed air have been conducted. Highly favorable results have been obtained on all aspects on which definite conclusions could be drawn.

  11. Short pulse and high repetition rate diode-pumped Yb:CaF2 regenerative amplifier

    E-Print Network [OSTI]

    Boyer, Edmond

    of high energy and ultra-short laser pulses. Many research efforts have been devoted to the generation-doped crystals. Within oscillators, ultra-short pulses (down to 47 fs with Yb:CALGO [1]) or high average powers and compact laser configurations. From this point of view, due to their favorable spectroscopic and thermal

  12. Injectable chemokine-releasing gelatin matrices for enhancing endogenous regenerative responses in the injured rat brain

    E-Print Network [OSTI]

    Lim, Teck Chuan

    2014-01-01T23:59:59.000Z

    Brain injuries acquired from hemorrhage, ischemic strokes and trauma affect millions worldwide each year and often cause irreversible loss of neural tissue that disrupts vital neurological functions. Cell transplantation ...

  13. An analysis of the regenerative expansion cycle in multi-component hydrocarbon separation systems 

    E-Print Network [OSTI]

    Horton, John Leroy

    1966-01-01T23:59:59.000Z

    ? EXPANDER SERIAL 0'3 Aspermont, Texas Test 0 Date Time 1 2 3 9 7/15/65 7/15/65 7/15/65 7/15/65 7/17/65 3:00pm 3:30pm 4:00pm 8:45pm 7:40am Amb ien t Air p Pf Pr W T f T r Tl T2 T3 T4 T5 T6 Vol. W mcfd Vol. F mcfd Vol. R mcfd Q? MBtu... and liquid, m C P? sC Pq Complete Cycle 3 Streams Unequal Lengths Heat Transferred (Q~) Figure XII Chapter III - D while Stream Y is a superheated vapor. The temperatures of Streams Y and Z remain equal along Sections A, B and C. As pointed out...

  14. Model-based analysis and simulation of regenerative heat wheel Zhuang Wu a

    E-Print Network [OSTI]

    Melnik, Roderick

    , which is used in many heat recovery systems. In this paper, a model-based analysis of a rotary Mechanical ventilation with heat recovery systems plays a vital role in securing optimum air quality, thermal heat recovery systems [3]. Such systems have a significant effect on the energy effectiveness

  15. A New Absorption Cycle: The Single-Effect Regenerative Absoprtion Refrigeration Cycle

    E-Print Network [OSTI]

    Dao, K.

    2011-01-01T23:59:59.000Z

    a way that each stage of the heat input and heat rejectionE coefficient of performance = qE/qB total heat input to theboiler = total heat input to the evaporator evaporator

  16. Performance evaluation of an active filter non-regenerative AC drive

    E-Print Network [OSTI]

    Skorcz, Alex Joseph

    2008-10-10T23:59:59.000Z

    .................................................... 17 2.4 Motor Loads ......................................................................................... 18 2.4.1 Permanent Magnet Synchronous Machine (PMSM) ......... 19 viii CHAPTER Page 2.4.1.1 Mathematical Modeling... ............................................................ 46 3.3.2 Rectifier .............................................................................. 46 3.3.3 Control System ................................................................... 47 3.3.4 Inverter-Driven PMSM...

  17. Performance evaluation of an active filter non-regenerative AC drive

    E-Print Network [OSTI]

    Skorcz, Alex Joseph

    2009-05-15T23:59:59.000Z

    .................................................... 17 2.4 Motor Loads ......................................................................................... 18 2.4.1 Permanent Magnet Synchronous Machine (PMSM) ......... 19 viii CHAPTER Page 2.4.1.1 Mathematical Modeling... ............................................................ 46 3.3.2 Rectifier .............................................................................. 46 3.3.3 Control System ................................................................... 47 3.3.4 Inverter-Driven PMSM...

  18. REGENERATIVE STORMWATER CONVEYANCE (RSC) AS AN INTEGRATED APPROACH TO SUSTAINABLE STORMWATER PLANNING ON LINEAR PROJECTS

    E-Print Network [OSTI]

    Berg, Joe; Underwood, Keith

    2009-01-01T23:59:59.000Z

    vernal pool wetland area, improved water quality treatment,treatment for road runoff to a receiving depression, wetland,wetland and stream ecosystem function. The collection, treatment and

  19. USDA Awards Nearly $2 Million for First Phase of Regenerative Community

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group current C3E AmbassadorsUS-EU-Japan Working Group on CriticalPlanned for

  20. USDA Awards Nearly $2 Million for First Phase of Regenerative Community

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCOSystems Analysis Success|Sustainable EnergyMotor CompanyPlanned for Pine

  1. Proceedings of the ASME 2010 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference

    E-Print Network [OSTI]

    Williams II, Robert L.

    Timothy Cyders Ohio University Athens, Ohio, USA tc285202@ohio.edu Robert L. Williams II Ohio University Athens, Ohio, USA williar4@ohio.edu ABSTRACT Effective continuously variable transmission (CVT) designs to the significant prospects of energy savings and performance increases [1-4]. A class of CVT's known as Infinitely

  2. On Centroidal Voronoi Tessellation--Energy Smoothness and Fast Computation

    E-Print Network [OSTI]

    Kazhdan, Michael

    101 On Centroidal Voronoi Tessellation--Energy Smoothness and Fast Computation YANG LIU Project of these methods. Specifically, we show that the CVT energy function has 2nd order smoothness for convex domains smoothness, it is possible to minimize the CVT energy functions using Newton-like optimization methods

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

    DOE Patents [OSTI]

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

    1998-01-01T23:59:59.000Z

    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.

  4. 21st Century Locomotive Technology: 2003 Annual Technical Status Report DOE/AL68284-TSR03

    SciTech Connect (OSTI)

    Lembit Salasoo

    2004-01-09T23:59:59.000Z

    The 21st Century Locomotive program objective is to develop 25% more efficient freight locomotives by 2010. Diesel engine-related research addresses advanced fuel injection, electric turbocharger and abradable seals. Assembly of a common rail fuel injection test system is underway, and a CFD combustion model has been validated. An electrically assisted turbocharger has been constructed and operated, meeting the generator mode design rating. System characterization and optimization is ongoing. Candidate abradable seal materials have been identified and test coupons prepared. Locomotive system-related research addresses capturing, storing and utilizing regenerative braking energy in a hybrid locomotive, and fuel optimization control. Hybrid locomotive energy storage requirements have been identified and studies on specific energy storage solutions are in progress. Energy management controls have been defined and testing initiated. Train and track parameter identification necessary for fuel optimization has been demonstrated.

  5. Near-term electric test vehicle ETV-2. Phase II. Final report

    SciTech Connect (OSTI)

    Not Available

    1981-04-01T23:59:59.000Z

    A unique battery-powered passenger vehicle has been developed that provides a significant improvement over conventional electric vehicle performance, particularly during stop-and-go driving. The vehicle is unique in two major respects: (1) the power system incorporates a flywheel that stores energy during regenerative braking and makes possible the acceleration capability needed to keep up with traffic without reducing range to unacceptable values; and (2) lightweight plastic materials are used for the vehicle unibody to minimize weight and increase range. These features were analyzed and demonstrated in an electric test vehicle, ETV-2. Characteristics of this vehicle are summarized. Information is presented on: vehicle design, fabrication, safety testing, and performance testing; power system design and operation; flywheel; battery pack performance; and controls and electronic equipment. (LCL)

  6. Electric vehicle drive train with direct coupling transmission

    DOE Patents [OSTI]

    Tankersley, Jerome B. (Fredericksburg, VA); Boothe, Richard W. (Roanoke, VA); Konrad, Charles E. (Roanoke, VA)

    1995-01-01T23:59:59.000Z

    An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox.

  7. Electric vehicle drive train with direct coupling transmission

    DOE Patents [OSTI]

    Tankersley, J.B.; Boothe, R.W.; Konrad, C.E.

    1995-04-04T23:59:59.000Z

    An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox. 6 figures.

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

    DOE Patents [OSTI]

    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

    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.

  9. Simulations of the Fuel Economy and Emissions of Hybrid Transit Buses over Planned Local Routes

    SciTech Connect (OSTI)

    Gao, Zhiming [ORNL] [ORNL; LaClair, Tim J [ORNL] [ORNL; Daw, C Stuart [ORNL] [ORNL; Smith, David E [ORNL] [ORNL; Franzese, Oscar [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    We present simulated fuel economy and emissions city transit buses powered by conventional diesel engines and diesel-hybrid electric powertrains of varying size. Six representative city drive cycles were included in the study. In addition, we included previously published aftertreatment device models for control of CO, HC, NOx, and particulate matter (PM) emissions. Our results reveal that bus hybridization can significantly enhance fuel economy by reducing engine idling time, reducing demands for accessory loads, exploiting regenerative braking, and shifting engine operation to speeds and loads with higher fuel efficiency. Increased hybridization also tends to monotonically reduce engine-out emissions, but trends in the tailpipe (post-aftertreatment) emissions involve more complex interactions that significantly depend on motor size and drive cycle details.

  10. A Bidirectional High-Power-Quality Grid Interface With a Novel Bidirectional Noninverted Buck Boost Converter for PHEVs

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL

    2012-01-01T23:59:59.000Z

    Plug-in hybrid electric vehicles (PHEVs) will play a vital role in future sustainable transportation systems due to their potential in terms of energy security, decreased environmental impact, improved fuel economy, and better performance. Moreover, new regulations have been established to improve the collective gas mileage, cut greenhouse gas emissions, and reduce dependence on foreign oil. This paper primarily focuses on two major thrust areas of PHEVs. First, it introduces a grid-friendly bidirectional alternating current/direct current ac/dc dc/ac rectifier/inverter for facilitating vehicle-to-grid (V2G) integration of PHEVs. Second, it presents an integrated bidirectional noninverted buck boost converter that interfaces the energy storage device of the PHEV to the dc link in both grid-connected and driving modes. The proposed bidirectional converter has minimal grid-level disruptions in terms of power factor and total harmonic distortion, with less switching noise. The integrated bidirectional dc/dc converter assists the grid interface converter to track the charge/discharge power of the PHEV battery. In addition, while driving, the dc/dc converter provides a regulated dc link voltage to the motor drive and captures the braking energy during regenerative braking.

  11. Detection of a magnetic field on HD108: clues to extreme magnetic braking and the Of?p phenomenon

    E-Print Network [OSTI]

    Martins, F; Marcolino, W L F; Bouret, J -C; Wade, G A; Escolano, C; Howarth, I D

    2010-01-01T23:59:59.000Z

    We report the detection of a magnetic field on the Of?p star HD108. Spectropolarimetric observations conducted in 2007, 2008 and 2009 respectively with NARVAL@TBL and ESPaDOnS@CFHT reveal a clear Zeeman signature in the average Stokes V profile, stable on timescales of days to months and slowly increasing in amplitude on timescales of years. We speculate that this timescale is the same as that on which Ha emission is varying and is equal to the rotation period of the star. The corresponding longitudinal magnetic field, measured during each of the three seasons, increases slowly from 100 to 150G, implying that the polar strength of the putatively-dipolar large-scale magnetic field of HD108 is at least 0.5kG and most likely of the order of 1-2 kG. The stellar and wind properties are derived through a quantitative spectroscopic analysis with the code CMFGEN. The effective temperature is difficult to constrain because of the unusually strong HeI4471 and HeI5876 lines. Values in the range 33000-37000 K are preferr...

  12. 486 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 54, NO. 2, MARCH 2005 Iterative Learning Control of Antilock Braking of

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    Engineering, University of Michigan-Dearborn, Dearborn, MI 48128 USA (e-mail: chrismi@umich.edu; mi Engineering, University of Michigan-Dearborn, Dearborn, MI 48128 USA (e-mail: anding@umich.edu). Digital driving, while the equivalent model, Corolla, which is driven by an internal combustion engine (ICE) alone

  13. Energy-Saving Control of an Unstable Valve with a MR Brake QingHui Yuan and Perry Y. Li

    E-Print Network [OSTI]

    Li, Perry Y.

    to the effect of flow induced forces, QingHui Yuan is with Eaton Corporation Innovation Center, Eden Prairie, MN. QinghuiYuan@eaton.com P. Y. Li is with the Department of Mechanical Engineering, University of Minnesota

  14. Power Modulation Investigation for High Temperature (175-200 degrees Celcius) Automotive Application

    SciTech Connect (OSTI)

    McCluskey, F. P.

    2007-04-30T23:59:59.000Z

    Hybrid electric vehicles were re-introduced in the late 1990s after a century dominated by purely internal combustion powered engines[1]. Automotive players, such as GM, Ford, DaimlerChrysler, Honda, and Toyota, together with major energy producers, such as BPAmoco, were the major force in the development of hybrid electric vehicles. Most notable was the development by Toyota of its Prius, which was launched in Japan in 1997 and worldwide in 2001. The shift to hybrids was driven by the fact that the sheer volume of vehicles on the road had begun to tax the ability of the environment to withstand the pollution of the internal combustion engine and the ability of the fossil fuel industry to produce a sufficient amount of refined gasoline. In addition, the number of vehicles was anticipated to rise exponentially with the increasing affluence of China and India. Over the last fifteen years, major advances have been made in all the technologies essential to hybrid vehicle success, including batteries, motors, power control and conditioning electronics, regenerative braking, and power sources, including fuel cells. Current hybrid electric vehicles are gasoline internal combustion--electric motor hybrids. These hybrid electric vehicles range from micro-hybrids, where a stop/start system cuts the engine while the vehicle is stopped, and mild hybrids where the stop/start system is supplemented by regenerative braking and power assist, to full hybrids where the combustion motor is optimized for electric power production, and there is full electric drive and full regenerative braking. PSA Peugeot Citroen estimates the increased energy efficiency will range from 3-6% for the micro-hybrids to 15-25% for the full hybrids.[2] Gasoline-electric hybrids are preferred in US because they permit long distance travel with low emissions and high gasoline mileage, while still using the existing refueling infrastructure. One of the most critical areas in which technology has been advancing has been the development of electronics that can operate in the high temperature environments present in hybrid vehicles. The temperatures under the hood for a gasoline-electric hybrid vehicle are comparable to those for traditional internal combustion engines. This is known to be a difficult environment with respect to commercial-grade electronics, as there are surface and ambient temperatures ranging from 125 C to 175 C. In addition, some hybrid drive electronics are placed in even harsher environments, such as on or near the brakes, where temperatures can reach 250 C. Furthermore, number of temperature cycles experienced by electronics in a hybrid vehicle is different from that experienced in a traditional vehicle. A traditional internal combustion vehicle will have the engine running for longer periods, whereas a mild or micro-hybrid engine will experience many more starts and stops.[3] This means that hybrid automotive electronics will undergo more cycles of a potential wider temperature cycle than standard automotive electronics, which in turn see temperature cycles of 2 to 3 times the magnitude of the {Delta}T = 50 C-75 C experienced by commercial-grade electronics. This study will discuss the effects of these harsh environments on the failure mechanisms and ultimate reliability of electronic systems developed for gasoline-electric hybrid vehicles. In addition, it will suggest technologies and components that can reasonably be expected to perform well in these environments. Finally, it will suggest areas where further research is needed or desirable. Areas for further research will be highlighted in bold, italic type. It should be noted that the first area where further research is desirable is in developing a clearer understanding of the actual hybrid automotive electronics environment and how to simulate it through accelerated testing, thus: Developing specific mission profiles and accelerated testing protocols for the underhood environment for hybrid cars, as has previously been done for gasoline-powered vehicles, is an important area for further st

  15. IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 10, NO. 2, MARCH 2002 209 Speed Gradient Approach to Longitudinal Control

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    differential action for varying grades. Index Terms--Automotive, braking, compression brake, heavy Approach to Longitudinal Control of Heavy-Duty Vehicles Equipped With Variable Compression Brake Maria of compression brake reduces the wear of the conventional friction brakes, and it is, thus, a preferred way

  16. Osteoblastic/Cementoblastic and Neural Differentiation of Dental Stem Cells and Their Applications to Tissue Engineering and Regenerative Medicine

    E-Print Network [OSTI]

    Bae, Hojae

    Recently, dental stem and progenitor cells have been harvested from periodontal tissues such as dental pulp, periodontal ligament, follicle, and papilla. These cells have received extensive attention in the field of tissue ...

  17. 2 1 Regenerative surgery (MeMo) fective site. Considering the fact that tissue engineering can be regarded as the

    E-Print Network [OSTI]

    Bielefeld, Universität

    distributed failure thresholds [9­11]. After each failure the stress is redistributed in the lattice acoustic waves are not taken into account and the activity is monitored by the dam- age evolution

  18. A 350 mu W CMOS MSK Transmitter and 400 mu W OOK Super-Regenerative Receiver for Medical Implant Communications

    E-Print Network [OSTI]

    Dawson, Joel L.

    Recent advances in the medical field are spurring the need for ultra-low power transceivers for wireless communication with medical implants. To deal with the growing demand for medical telemetry, the FCC commissioned the ...

  19. Analysis of hydraulic power transduction in regenerative rotary shock absorbers as function of working fluid kinematic viscosity

    E-Print Network [OSTI]

    Avadhany, Shakeel N

    2009-01-01T23:59:59.000Z

    This investigation seeks to investigate the relationship of kinematic fluid viscosity to the effective power transduction seen by a hydraulic motor. Applications of this research specifically relate to energy recovery from ...

  20. Large Scale Laser Two-Photon Polymerization Structuring for Fabrication of Artificial Polymeric Scaffolds for Regenerative Medicine

    SciTech Connect (OSTI)

    Malinauskas, M.; Purlys, V.; Zukauskas, A.; Rutkauskas, M.; Danilevicius, P.; Paipulas, D.; Bickauskaite, G.; Gadonas, R.; Piskarskas, A. [Vilnius University, Physics Faculty, Department of Quantum Electronics, Laser Research Center, Sauletekio ave. 10, LT-10223 Vilnius (Lithuania); Bukelskis, L.; Baltriukiene, D.; Bukelskiene, V. [Institute of Biochemistry, Vivarium, Mokslininkuo str. 12, LT-08662 Vilnius (Lithuania); Sirmenis, R. [Vilnius University Hospital Santariskiuo Klinikos, Santariskiuo g. 2, LT-08661 Vilnius (Lithuania); Gaidukeviciute, A. [Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, Vassilika Vouton, 711 10 Heraklion, Crete (Greece); Sirvydis, V. [Vilnius University, Faculty of Medicine, Heart Surgery Center, Santariskiuo 2, LT-08661, Vilnius (Lithuania)

    2010-11-10T23:59:59.000Z

    We present a femtosecond Laser Two-Photon Polymerization (LTPP) system of large scale three-dimensional structuring for applications in tissue engineering. The direct laser writing system enables fabrication of artificial polymeric scaffolds over a large area (up to cm in lateral size) with sub-micrometer resolution which could find practical applications in biomedicine and surgery. Yb:KGW femtosecond laser oscillator (Pharos, Light Conversion. Co. Ltd.) is used as an irradiation source (75 fs, 515 nm (frequency doubled), 80 MHz). The sample is mounted on wide range linear motor driven stages having 10 nm sample positioning resolution (XY--ALS130-100, Z--ALS130-50, Aerotech, Inc.). These stages guarantee an overall travelling range of 100 mm into X and Y directions and 50 mm in Z direction and support the linear scanning speed up to 300 mm/s. By moving the sample three-dimensionally the position of laser focus in the photopolymer is changed and one is able to write complex 3D (three-dimensional) structures. An illumination system and CMOS camera enables online process monitoring. Control of all equipment is automated via custom made computer software ''3D-Poli'' specially designed for LTPP applications. Structures can be imported from computer aided design STereoLihography (stl) files or programmed directly. It can be used for rapid LTPP structuring in various photopolymers (SZ2080, AKRE19, PEG-DA-258) which are known to be suitable for bio-applications. Microstructured scaffolds can be produced on different substrates like glass, plastic and metal. In this paper, we present microfabricated polymeric scaffolds over a large area and growing of adult rabbit myogenic stem cells on them. Obtained results show the polymeric scaffolds to be applicable for cell growth practice. It exhibit potential to use it for artificial pericardium in the experimental model in the future.

  1. DESCRIPTION OF CYCLES Both a simple cycle and a regenerative cycle were examined; these are described in Fig 1.

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    conditions, some of the water vapor will condense in the indoor coil. It was assumed that the condensate OF ANALYSIS. The principal challenge in the analysis of air cycle with water injection was to devise a simple) which is valid for an ideal gas. To approximate the entropy change of the water vapor, the following

  2. Improving Process Control Immunity to Supply Voltage Sags in Petroleum and Chemical Industries

    E-Print Network [OSTI]

    Mansoor, A.; Dorr, D.; Olson, G.

    IMPROVING PROCESS CONTROL IMMUNITY TO SUPPLY VOLTAGE SAGS IN PETROLEUM AND CHEMICAL INDUSTRIES Douglas Dorr and Arshad Mansoor EPRI Power Electronics Applications Center Knoxville, TN ABSTRACT In the modem industrial facility, many... by EPRI's Power Quality Test Facility clearly shows that CVT's are an excellent solution for voltage sag problems when they are sized properly. The optimum sizing is achieved when the CVT is loaded to no more than about 40 Figure 3. Batteryless UPS...

  3. alternative fuel vehicles: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  4. alternatively fueled vehicle: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  5. alternative vehicles fuel: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  6. alternate fuel vehicle: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  7. alternative fuel vehicle: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  8. alternative fuels vehicle: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

  9. automotive exhaust gas: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    additive to diesel-biodiesel blends. The combined effect of EGR and DTBP on Brake Thermal Efficiency(BTE), Brake Specific Fuel Consumption (BSFC), cylinder pressure and exhaust...

  10. Sensor-Friendly Freeways: Investigation of Progressive Roadway Changes to Facilitate Deployment of AHS

    E-Print Network [OSTI]

    Misener, James A.; Griffiths, Paul; Johnson, Lee; Segal, Andy

    2001-01-01T23:59:59.000Z

    three potential systems: Light Emitting Diode Brake Lightthree potential systems: Light Emitting Diode Brake Lightfrom a vehicle. Light Emitting Diode Brakelight Messaging

  11. automobile foundry workers: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Robert J. 8 Automatic Foundry Brake Disk Inspection through CiteSeer Summary: We present a fully automated raw foundry brake disk visual inspection system in which three...

  12. DRIVE -Disseminating Resource Information in VEhicular and other

    E-Print Network [OSTI]

    Wolfson, Ouri E.

    , UIC 3 Sensor-networked Transportation Vehicle sensors: speed, fuel, cameras, airbag, anti-lock brakes

  13. Machine Design -2 The figure below shows a picture of the splined end of a failed half-shaft. The fatigue failure occurred at the

    E-Print Network [OSTI]

    Virginia Tech

    and resists the braking torque on deceleration. The acceleration and braking torques act in opposite directions, the braking torque will be taken as positive since it is the larger torque. The acceleration torque is measured accurately, Tmin = -411.6 in-lbf. The braking torque is loosely estimated as Tmax

  14. Experimental analysis on squeal modal instability F.Massi, L.Baillet, O.Giannini

    E-Print Network [OSTI]

    Boyer, Edmond

    -mail: francesco.massi@uniroma1.it Abstract In this paper, an experimental analysis performed on a simplified brake apparatus is presented. Brake squeal is a major concern in braking design. During past years a common a dynamic instability. When two modes of the brake system couple at the same frequency, one of them becomes

  15. Security Framework for Correct and Secure Positioning in V2X Communication Networks

    E-Print Network [OSTI]

    Weske, Mathias

    . Different law prescriptions such as safety-belt laws, antiblocking brake systems (ABS), airbags, and other

  16. Reliable Real-Time Applications on Android OS Bhupinder S. Mongia Vijay K. Madisetti, Fellow, IEEE

    E-Print Network [OSTI]

    Madisetti, Vijay K.

    services (Control Class: drive control, braking; Safety Class: seatbelts, airbags; Infotainment Class

  17. Atmospheric Environment 41 (2007) 49084919 Particle size and composition distribution analysis of automotive

    E-Print Network [OSTI]

    Short, Daniel

    2007-01-01T23:59:59.000Z

    of automotive brake abrasion dusts for the evaluation of antimony sources of airborne particulate matter Akihiro

  18. Observations of Infalling and Rotational Motions on a 1,000-AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?

    E-Print Network [OSTI]

    Yen, Hsi-Wei; Takakuwa, Shigehisa; Ho, Paul T P; Ohashi, Nagayoshi; Tang, Ya-Wen

    2014-01-01T23:59:59.000Z

    We perform imaging and analyses of SMA 1.3 mm continuum, C18O (2-1) and 12CO (2-1) line data of 17 Class 0 and 0/I protostars to study their gas kinematics on a 1,000-AU scale. Continuum and C18O (2-1) emission are detected toward all the sample sources and show central primary components with sizes of ~600-1,500 AU associated with protostars. The velocity gradients in C18O (2-1) have wide ranges of orientations from parallel to perpendicular to the outflows, with magnitudes from ~1 to ~530 km/s/pc. We construct a simple kinematic model to reproduce the observed velocity gradients, estimate the infalling and rotational velocities, and infer the disk radii and the protostellar masses. The inferred disk radii range from 500 AU with estimated protostellar masses from 1 Msun. Our results hint that both large and small disks are possibly present around Class 0 protostars, which could be a sign of disk growth at the Class 0 stage. In addition, the directions of the overall velocity gradients in 7 out of the 17 sour...

  19. Living Bacterial Sacrificial Porogens to Engineer Decellularized Porous Scaffolds

    E-Print Network [OSTI]

    Xu, Feng

    Decellularization and cellularization of organs have emerged as disruptive methods in tissue engineering and regenerative medicine. Porous hydrogel scaffolds have widespread applications in tissue engineering, regenerative ...

  20. An Optimization Model for Plug-In Hybrid Electric Vehicles

    SciTech Connect (OSTI)

    Malikopoulos, Andreas [ORNL] [ORNL; Smith, David E [ORNL] [ORNL

    2011-01-01T23:59:59.000Z

    The necessity for environmentally conscious vehicle designs in conjunction with increasing concerns regarding U.S. dependency on foreign oil and climate change have induced significant investment towards enhancing the propulsion portfolio with new technologies. More recently, plug-in hybrid electric vehicles (PHEVs) have held great intuitive appeal and have attracted considerable attention. PHEVs have the potential to reduce petroleum consumption and greenhouse gas (GHG) emissions in the commercial transportation sector. They are especially appealing in situations where daily commuting is within a small amount of miles with excessive stop-and-go driving. The research effort outlined in this paper aims to investigate the implications of motor/generator and battery size on fuel economy and GHG emissions in a medium-duty PHEV. An optimization framework is developed and applied to two different parallel powertrain configurations, e.g., pre-transmission and post-transmission, to derive the optimal design with respect to motor/generator and battery size. A comparison between the conventional and PHEV configurations with equivalent size and performance under the same driving conditions is conducted, thus allowing an assessment of the fuel economy and GHG emissions potential improvement. The post-transmission parallel configuration yields higher fuel economy and less GHG emissions compared to pre-transmission configuration partly attributable to the enhanced regenerative braking efficiency.

  1. Investigating the low-temperature impedance increase of lithium-ion cells.

    SciTech Connect (OSTI)

    Abraham, D. P.; Heaton, J. R.; Kang, S.-H.; Dees, D. W.; Jansen, A. N.; Chemical Engineering

    2008-01-01T23:59:59.000Z

    Low-temperature performance loss is a significant barrier to commercialization of lithium-ion cells in hybrid electric vehicles. Increased impedance, especially at temperatures below 0 C, reduces the cell pulse power performance required for cold engine starts, quick acceleration, or regenerative braking. Here we detail electrochemical impedance spectroscopy data on binder- and carbon-free layered-oxide and spinel-oxide electrodes, obtained over the +30 to ?30 C temperature range, in coin cells containing a lithium-preloaded Li{sub 4/3}Ti{sub 5/3}O{sub 4} composite (LTOc) counter electrode and a LiPF{sub 6}-bearing ethylene carbonate/ethyl methyl carbonate electrolyte. For all electrodes studied, the impedance increased with decreasing cell temperature; the increases observed in the midfrequency arc dwarfed the increases in ohmic resistance and diffusional impedance. Our data suggest that the movement of lithium ions across the electrochemical interface on the active material may have been increasingly hindered at lower temperatures, especially below 0 C. Low-temperature performance may be improved by modifying the electrolyte-active material interface (for example, through electrolyte composition changes). Increasing surface area of active particles (for example, through nanoparticle use) can lower the initial electrode impedance and lead to lower cell impedances at -30 C.

  2. Turbulent drag reduction through oscillating discs

    E-Print Network [OSTI]

    Wise, Daniel J

    2014-01-01T23:59:59.000Z

    The changes of a turbulent channel flow subjected to oscillations of wall flush-mounted rigid discs are studied by means of direct numerical simulations. The Reynolds number is $R_\\tau$=$180$, based on the friction velocity of the stationary-wall case and the half channel height. The primary effect of the wall forcing is the sustained reduction of wall-shear stress, which reaches a maximum of 20%. A parametric study on the disc diameter, maximum tip velocity, and oscillation period is presented, with the aim to identify the optimal parameters which guarantee maximum drag reduction and maximum net energy saving, computed by taking into account the power spent to actuate the discs. This may be positive and reaches 6%. The Rosenblat viscous pump flow is used to predict the power spent for disc motion in the turbulent channel flow and to estimate localized and transient regions over the disc surface subjected to the turbulent regenerative braking effect, for which the wall turbulence exerts work on the discs. The...

  3. User's guide to DIANE Version 2. 1: A microcomputer software package for modeling battery performance in electric vehicle applications

    SciTech Connect (OSTI)

    Marr, W.W.; Walsh, W.J. (Argonne National Lab., IL (USA). Energy Systems Div.); Symons, P.C. (Electrochemical Engineering Consultants, Inc., Morgan Hill, CA (USA))

    1990-06-01T23:59:59.000Z

    DIANE is an interactive microcomputer software package for the analysis of battery performance in electric vehicle (EV) applications. The principal objective of this software package is to enable the prediction of EV performance on the basis of laboratory test data for batteries. The model provides a second-by-second simulation of battery voltage and current for any specified velocity/time or power/time profile. The capability of the battery is modeled by an algorithm that relates the battery voltage to the withdrawn current, taking into account the effect of battery depth-of-discharge (DOD). Because of the lack of test data and other constraints, the current version of DIANE deals only with vehicles using fresh'' batteries with or without regenerative braking. Deterioration of battery capability due to aging can presently be simulated with user-input parameters accounting for an increase of effective internal resistance and/or a decrease of cell no-load voltage. DIANE 2.1 is written in FORTRAN language for use on IBM-compatible microcomputers. 7 refs.

  4. Reconciling a Reactionless Propulsive Drive with the First Law of Thermodynamics

    E-Print Network [OSTI]

    Higgins, Andrew J

    2015-01-01T23:59:59.000Z

    A "space drive" is a hypothetical device that generates a propulsive force in free space using an input of power without the need for a reaction mass. Any device that generates photons (e.g., a laser) would qualify as a propellantless "photon rocket," but the force generated by emitting photons per power input (3.33 $\\mu$N/kW) is too small to be a practical propulsion device. The ability to generate greater force per power input would be highly desirable, but, as demonstrated in this paper, such a device would be able to operate as a perpetual motion machine of the first kind. Since applying a constant force results in a constant acceleration, the kinetic energy of a mass driven by such a device increases quadratically with time, while the energy input increases only linearly with time. Thus, at some point, the kinetic energy of the device-driven mass exceeds the energy input, and if this energy is collected via decelerating the mass (via regenerative electromagnetic braking, for example), then there would be...

  5. Electric vehicles move closer to market

    SciTech Connect (OSTI)

    O`Connor, L.

    1995-03-01T23:59:59.000Z

    This article reports that though battery technology is currently limiting the growth of EVs, the search for improvements is spurring innovative engineering developments. As battery makers, automakers, national laboratories, and others continue their search for a practical source of electric power that will make electric vehicles (EVs) more viable, engineers worldwide are making progress in other areas of EV development. Vector control, for example, enables better regulation of motor torque and speed; composite and aluminum parts reduce the vehicle`s weight, which in turn reduces the load on the motor and battery; and flywheel energy storage systems, supercapacitors, regenerative brake systems, and hybrid/electric drive trains increase range and acceleration. Despite efforts to develop an electric vehicle from the ground up, most of the early EVs to be sold in the United States will likely be converted from gasoline-powered vehicles. Chrysler Corp., for example, is expected to sell electric versions of its minivans and build them on the same assembly line as its gasoline-powered vehicles to reduce costs. The pace of engineering development in this field is fast and furious. Indeed, it is virtually impossible to monitor all emerging EV technology. To meet their quotas, the major automakers may even consider buying credits from smaller, innovative EV manufacturers. But whatever stopgap measures vehicle makers take, technology development will be the driving force behind long-term EV growth.

  6. Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles (Presentation)

    SciTech Connect (OSTI)

    Neubauer, J.; Wood, E.

    2013-05-01T23:59:59.000Z

    This presentation discusses a method of accounting for realistic levels of driver aggression to higher-level vehicle studies, including the impact of variation in real-world driving characteristics (acceleration and speed) on vehicle energy consumption and different powertrains (e.g., conventionally powered vehicles versus electrified drive vehicles [xEVs]). Aggression variation between drivers can increase fuel consumption by more than 50% or decrease it by more than 20% from average. The normalized fuel consumption deviation from average as a function of population percentile was found to be largely insensitive to powertrain. However, the traits of ideal driving behavior are a function of powertrain. In conventional vehicles, kinetic losses dominate rolling resistance and aerodynamic losses. In xEVs with regenerative braking, rolling resistance and aerodynamic losses dominate. The relation of fuel consumption predicted from real-world drive data to that predicted by the industry-standard HWFET, UDDS, LA92, and US06 drive cycles was not consistent across powertrains, and varied broadly from the mean, median, and mode of real-world driving. A drive cycle synthesized by NREL's DRIVE tool accurately and consistently reproduces average real-world for multiple powertrains within 1%, and can be used to calculate the fuel consumption effects of varying levels of driver aggression.

  7. PWM Regenerative Rectifiers: State of the Art J. Rodriguez, Senior Member, IEEE, J. Dixon, J. Espinoza, Member, IEEE, and P. Lezana.

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    frequency. The simplest line-commutated converters use diodes to trans- form the electrical energy from AC. Espinoza, Member, IEEE, and P. Lezana. Abstract-- New regulations impose more stringent limits to current with low switching frequency (line commutated) and other circuits which operate with high switching

  8. Regenerative process for removal of mercury and other heavy metals from gases containing H.sub.2 and/or CO

    DOE Patents [OSTI]

    Jadhav, Raja A. (Naperville, IL)

    2009-07-07T23:59:59.000Z

    A method for removal of mercury from a gaseous stream containing the mercury, hydrogen and/or CO, and hydrogen sulfide and/or carbonyl sulfide in which a dispersed Cu-containing sorbent is contacted with the gaseous stream at a temperature in the range of about 25.degree. C. to about 300.degree. C. until the sorbent is spent. The spent sorbent is contacted with a desorbing gaseous stream at a temperature equal to or higher than the temperature at which the mercury adsorption is carried out, producing a regenerated sorbent and an exhaust gas comprising released mercury. The released mercury in the exhaust gas is captured using a high-capacity sorbent, such as sulfur-impregnated activated carbon, at a temperature less than about 100.degree. C. The regenerated sorbent may then be used to capture additional mercury from the mercury-containing gaseous stream.

  9. News & Views ISSN 1746-075110.2217/RME.13.31 2013 Future Medicine Ltd Regen. Med. (2013) 8(4), 409412 409

    E-Print Network [OSTI]

    Zandstra, Peter W.

    2013-01-01T23:59:59.000Z

    in biotechnology. I completed an undergraduate degree in Chemical Engineering and Biotechnology, followed by a Ph of Engineering degree from McGill University (QC, Canada) in the Department of Chemical Engineering, and obtained of Biomaterials and Biomedical Engineering, and he is cross-appointed with the Departments of Chemical Engineering

  10. A Platform Technology for Optimized Production of Islet-like Spheroids and Other 3D Cell Spheroids for Applications in Drug Discovery and Regenerative Medicine

    E-Print Network [OSTI]

    Ramachandran, Karthik

    2012-05-31T23:59:59.000Z

    diffusion is the primary mode of nutrient transport. Diabetic rats that received Kanslet transplants regained insulin independence similar to those receiving native islet transplants. For the high-throughput drug screening, size-optimized Kanslets were...

  11. Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream

    DOE Patents [OSTI]

    Cohen, M.R.; Gal, E.

    1993-04-13T23:59:59.000Z

    A process and system are described for simultaneously removing from a gaseous mixture, sulfur oxides by means of a solid sulfur oxide acceptor on a porous carrier, nitrogen oxides by means of ammonia gas and particulate matter by means of filtration and for the regeneration of loaded solid sulfur oxide acceptor. Finely-divided solid sulfur oxide acceptor is entrained in a gaseous mixture to deplete sulfur oxides from the gaseous mixture, the finely-divided solid sulfur oxide acceptor being dispersed on a porous carrier material having a particle size up to about 200 microns. In the process, the gaseous mixture is optionally pre-filtered to remove particulate matter and thereafter finely-divided solid sulfur oxide acceptor is injected into the gaseous mixture.

  12. Control system and method for a power delivery system having a continuously variable ratio transmission

    DOE Patents [OSTI]

    Frank, A.A.

    1984-07-10T23:59:59.000Z

    A control system and method for a power delivery system, such as in an automotive vehicle, having an engine coupled to a continuously variable ratio transmission (CVT). Totally independent control of engine and transmission enable the engine to precisely follow a desired operating characteristic, such as the ideal operating line for minimum fuel consumption. CVT ratio is controlled as a function of commanded power or torque and measured load, while engine fuel requirements (e.g., throttle position) are strictly a function of measured engine speed. Fuel requirements are therefore precisely adjusted in accordance with the ideal characteristic for any load placed on the engine. 4 figs.

  13. Control system and method for a power delivery system having a continuously variable ratio transmission

    DOE Patents [OSTI]

    Frank, Andrew A. (1034 Hillside Ave., Madison, WI 53705)

    1984-01-01T23:59:59.000Z

    A control system and method for a power delivery system, such as in an automotive vehicle, having an engine coupled to a continuously variable ratio transmission (CVT). Totally independent control of engine and transmission enable the engine to precisely follow a desired operating characteristic, such as the ideal operating line for minimum fuel consumption. CVT ratio is controlled as a function of commanded power or torque and measured load, while engine fuel requirements (e.g., throttle position) are strictly a function of measured engine speed. Fuel requirements are therefore precisely adjusted in accordance with the ideal characteristic for any load placed on the engine.

  14. Rekuperativ katalytisk udstdsreaktor til stationre gasmotorer

    E-Print Network [OSTI]

    at fairly low flue gas temperatures in the exhaust to regenerative incineration plants that increase

  15. Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks 90% of this material is reproduced brakes before a collision Some 40% more do not brake effectively Road Accidents 41.600 fatalities 1

  16. Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks 90% of this material is reproduced brakes before a collision Some 40% more do not brake effectively Road Accidents 41.600 fatalities 1

  17. Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks 90% of this material is reproduced% of passengers vehicles and 26% of trucks do not activate brakes before a collision Some 40% more do not brake

  18. Empathic Experience Design (Seepersad) | 1! EMPATHIC EXPERIENCE DESIGN!

    E-Print Network [OSTI]

    Ghosh, Joydeep

    ! Cost! External interactions! User interactions! Architecture! ·material flow! ·energy flow! ·inform to a product! · Often innovate themselves! Drum Brakes! Aftermarket Forks! Quick-release seats! Motorcycle brake levers! Reinforced Frames! [4] Von Hippel, E., 2005, Democratizing Innovation, MIT Press.! Photo

  19. WHEN A GOOD FIT IS NOT GOOD ENOUGH: A CASE STUDY ON THE FINAL RITARD*

    E-Print Network [OSTI]

    Amsterdam, University of

    -based models are also influenced by the temporal structure of the musical material that constraints possible for these models of physical motion is that constant braking force (q=2; see Figure 1b) or constant braking power

  20. Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks

    E-Print Network [OSTI]

    Lo Cigno, Renato Antonio

    Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks 90% of this material is reproduced% of passengers vehicles and 26% of trucks do not activate brakes before a collision Some 40% more do not brake

  1. WHAT YOUNG ADULTS NEED TO KNOW

    E-Print Network [OSTI]

    Goodman, Robert M.

    yourself the following questions: u What are the safety ratings for the car? u Will the car have airbags? Where are the airbags located? u Will the car have ABS (anti-lock braking system) brakes? u What

  2. Data Collection for Improved Cold Temperature Thermal Modeling

    Broader source: Energy.gov (indexed) [DOE]

    funding: 250k 2 Overview 3. Exh. waste heat 1. Heat transfer 2. Brake power * 1) 33% (loss, heat transfer) * 2) 33% (brake power) * 3) 33% (loss, exhaust waste) Energy in 3...

  3. An Introductory Textbook on Cyber-Physical Systems Edward A. Lee

    E-Print Network [OSTI]

    Seshia, Sanjit A.

    of computers in use, however, are much less visible. They run the engine, brakes, seatbelts, airbag, and audio

  4. A Smart Angular Rate Sensor System Ajit Sharma, Mohammad Faisal Zaman, Farrokh Ayazi

    E-Print Network [OSTI]

    Ayazi, Farrokh

    , anti-skid and safety systems, roll-over detection, next generation airbag and anti-lock brake systems

  5. CRANE/HOIST SAFETY PROGRAM Texas Tech University

    E-Print Network [OSTI]

    Zhang, Yuanlin

    HOLDING BRAKE..........................................................................................6) are protected from potential hazards associated with the movement of equipment and material. The Crane

  6. Technical Report #36 March 1, 1984 Computational Logic Inc.

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    . An entire line of automobiles is recalled because of problems with the software that controls the braking

  7. Motion planning for 3D Navier Stokes equations and stability of nonholonomic source seeking algorithms

    E-Print Network [OSTI]

    Cochran, Jennie Eleanor

    2008-01-01T23:59:59.000Z

    control of a tunable thermoacoustic cooler,” IEEE Trans.braking systems, [48] in thermoacoustic coolers, and [88] in

  8. RATES

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Marketing > RATES RATES Current Rates Past Rates 2006 2007 2008 2009 2010 2011 2012 Rates Schedules Power CV-F13 CPP-2 Transmissions CV-T3 CV-NWT5 PACI-T3 COTP-T3 CV-TPT7 CV-UUP1...

  9. F2010-B-107 MODELING OF THE THS-II SERIES/PARALLEL POWER TRAIN AND

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    F2010-B-107 MODELING OF THE THS-II SERIES/PARALLEL POWER TRAIN AND ITS ENERGY MANAGEMENT SYSTEM ­ Hybrid power train, power-split eCVT, rule-based control strategy, Toyota Hybrid System, driver-based engineering intuition controller. The model encloses the modeling of the vehicle dynamics, the power train

  10. Precise simulation of criticality in asymmetric fluids G. Orkoulas, Michael E. Fisher, and A. Z. Panagiotopoulos

    E-Print Network [OSTI]

    . Simulations of the heat capacity CV(T, ) and d2 p /dT2 , where p is the vapor pressure below Tc , suggest. INTRODUCTION Liquid-vapor and liquid-liquid phase separation and the related critical behavior in real fluids and liquid phases coexist. As Yang and Yang 2 pointed out in 1964, such a divergence is forbidden

  11. Behavior-based trajectory adaptation based on bucket-volume estimation

    E-Print Network [OSTI]

    Berns, Karsten

    Outdoor Robot). Long-term goal of this project is to develop a fully autonomous bucket excavator which project is to create a fully autonomous bucket excavator which is capable of performing landscaping tasks on a construction site [1]. Figure 1 shows a picture of the automated 18-ton wheeled excavator test platform. CVT

  12. 48669Federal Register / Vol. 65, No. 154 / Wednesday, August 9, 2000 / Proposed Rules Type of motor vehicle

    E-Print Network [OSTI]

    vehicle Service Brake Systems Emergency brake sys- tems: applica- tion and brak- ing distance in feet from initial speed of 20 mph Braking force as a percent- age of gross vehicle or combination weight mph B. Property-carrying vehicles: (1) Single unit vehicles having a manufacturer's GVWR of 10

  13. Getting Out of the Way Safety Verification without Compromise

    E-Print Network [OSTI]

    Sivilotti, Paul

    verification of adaptive cruise control algorithms require both discrete braking modes and overly conservative conditions for adaptive cruise control algorithms that do not require discontinuous braking and also allow · Assume global upper and lower braking bounds · Assume worst-case scenario (WCS) ­ Leader uses strongest

  14. Traffic Light Mapping and Detection Nathaniel Fairfield Chris Urmson

    E-Print Network [OSTI]

    Tomkins, Andrew

    by lines painted on the road, traffic lights indicate precedence at intersections, brake lights show when, are becoming common- place as part of commercial driver-assistance systems. With power steering, power brakes obstructions or false positives such as those induced by the brake lights of other vehicles. Happily, both

  15. Design and Implementation of a Teleautonomous Hummer Darrin C. Bentivegna, Khaled S. Ali, Ronald C. Arkin and Tucker Balch

    E-Print Network [OSTI]

    for steering, brake, and throttle have been implemented on a commercially available Hummer. Control is provided to feedback sensors for the steering wheel, brake, and forward speed; and a Unix workstation for high control the steering wheel, brake pedal and throttle. A control computer performs low­level computation

  16. A Preliminary Report on Tool Support and Methodology for Feature Interaction Detection

    E-Print Network [OSTI]

    Waterloo, University of

    that operate the dynamics of the vehicle. Examples of these mechanical components are brakes, throttle of these mechanical components are brakes, throttle and steering. Ideally, features should be able to be integrated simultaneous requests to apply the brakes and the throttle. The feature interaction problem becomes more

  17. Influence of physical parameters and operating conditions for structural integrity of mechanical system subjected to squeal noise

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    for the static load and circular wave front lines for the ramp loading. Introduction Disc brake systems-linear vibrations, acoustic radiation, brake squeal, friction Abstract. This work proposes to study the effects of physical parameters and loading conditions on both dynamic and acoustic responses of a brake system

  18. Science Arts & Mtiers (SAM) is an open access repository that collects the work of Arts et Mtiers ParisTech

    E-Print Network [OSTI]

    Boyer, Edmond

    BALMES - On the influence of geometry updating on modal correlation of brake components. - 2012 Any On the influence of geometry updating on modal correlation of brake components. B. França de Paulaa , G. Rejdycha degradation of the test/analysis correlation. An application to an industrial brake part is eventually

  19. Correctness Proofs for Device Drivers in Embedded Systems Jianjun Duan

    E-Print Network [OSTI]

    Regehr, John

    that may be thousands of lines; we intend to integrate our manual proofs about bottom-level routines. For example, an auto- motive brake-by-wire system might be required to begin brake drum actuation within 50 ms of receiving a brake pedal input. Let's look at a more detailed example: a hypothetical embedded system

  20. A Vehicle-to-Vehicle Communication Protocol for Cooperative Collision Warning

    E-Print Network [OSTI]

    Liu, Jie

    safer than B due to the following two reasons: ¤ Line-of-sight limitation of brake light: Typically by Vodafone-U.S. Foundation Graduate Fellowship. and £ , travel in the same lane. When ¡ suddenly brakes, a driver can only see the brake light from the vehicle di- rectly in front1 . Thus, very likely vehicle

  1. ME 379M Race Car Engineering and Project Management ABET EC2000 syllabus

    E-Print Network [OSTI]

    Ben-Yakar, Adela

    . Engine Calibration (5 classes) 3. Modeling Straight Line Performance (3 classes) 4. Braking and Brake in class. Other Required Material: NA Course Objectives: The primary goal of ME 379M is to teach economy and emissions, transmission/differential, and vehicle performance modeling. 3) Brake systems

  2. Journal of Cleaner Production 13 (2005) 1931 www.elsevier.com/locate/jclepro

    E-Print Network [OSTI]

    Short, Daniel

    and products of service. Brake pads are true products of consumption, because they are released to biological be expec- ted to be increasingly used for cars. However, cars also contain some consumption parts polyethylene terephthalate (PET) [3]. Brake pads (syn- onym ``brake linings'') are polymer matrix composites

  3. Concurrency Theory Lecture 22: Timed Modelling & Conclusions

    E-Print Network [OSTI]

    Ábrahám, Erika

    Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile phones ... Real-Time Reactive Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls

  4. Analysis, Design, And Evaluation Of Avcs For Heavy-duty Vehicles With Actuator Delays

    E-Print Network [OSTI]

    Yanakiev, Diana; Eyre, Jennifer; Kanellakopoulos, Ioannis

    1998-01-01T23:59:59.000Z

    fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 4: Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 5: Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 8: Ten autonomous vehicles,

  5. Analysis, Design And Evaluation Of Avcs For Heavy-duty Vehicles

    E-Print Network [OSTI]

    Yanakiev, Diana; Kanellakopoulos, Ioannis

    1996-01-01T23:59:59.000Z

    fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 2 : Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 3 : Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 6 : Ten autonomous vehicles,

  6. ACCEPTED AUTHORS' DRAFT, THE FINAL VERSION TO APPEAR IN THE IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 13, NO. 6, 669677, 2008. 1 Eddy Current Brakes for Haptic Interfaces

    E-Print Network [OSTI]

    Hayward, Vincent

    relationship including contributions from sensor quantization and coulomb friction [5]­[7]. Manuscript, uncertain dissipation arises from various origins such as dry friction, viscosity, or magnetic drag

  7. Modulating cell behavior with engineered HER-receptor ligands

    E-Print Network [OSTI]

    Alvarez, Luis M. (Luis Manuel)

    2009-01-01T23:59:59.000Z

    The primary motivation for this work is the manipulation of EGFR family signaling to influence regenerative responses of mesenchymal stem cells (MSC). Underlying the potential of regenerative medicine is the need to ...

  8. Bioreactors Stem Cells

    E-Print Network [OSTI]

    Schüler, Axel

    Keywords Bioreactors Stem Cells Regenerative Medicine Tissue Engineering Pharmacology » Prof. bioreactors, hy- brid systems, e. g. bioartificial liver, fully biological implants, e. g. car- diovascular- opments in regenerative medicine is tissue and organ regeneration rather than reparation. Bioreactor

  9. Identification of pluripotent stem cells and characterization of glia in the planarian Schmidtea mediterranea

    E-Print Network [OSTI]

    Wang, Irving E

    2014-01-01T23:59:59.000Z

    Given their regenerative capacity, the planarian Schmidtea mediterranea has emerged as a model system for the study of stem cell biology, tissue specification, and axis formation. Many aspects of the regenerative machinery ...

  10. Mouse and human embryonic stem cells: can they improve human health by preventing disease?

    E-Print Network [OSTI]

    Talbot, Prue

    2013-01-01T23:59:59.000Z

    current progress and potential for regenerative medicine.progress toward development of new industrial prod- ucts and medicines.

  11. Using Embryonic Stem Cells as a Novel Model to Compare the Toxicological Effects of Harm Reduction and Conventional Cigarette Smoke on Early Embryo Development

    E-Print Network [OSTI]

    Lin, Sabrina Chia-Chin

    2010-01-01T23:59:59.000Z

    current progress and potential for regenerative medicine.progress toward development of new industrial products and medicines.

  12. Durability of Diesel Engine Particulate Filters

    Broader source: Energy.gov (indexed) [DOE]

    approved Barriers * - Propulsion Materials Technology: * Changing internal combustion engine combustion regimes Optimize to minimize thermal stresses during regen. * Cost ...

  13. Power Electronics Architecture R&D

    Broader source: Energy.gov (indexed) [DOE]

    management, inverter efficiency improvement, better RESS utilization. - Design a hybrid batteryultra-capacitor energy storage system architecture, * Improved regenerative...

  14. BIOENGINEERING, FOOD, AND NATURAL PRODUCTS Gas Permeance Measurement of Hollow Fiber

    E-Print Network [OSTI]

    Federspiel, William J.

    . of Bioengineering Brack G. Hattler McGowan Institute for Regenerative Medicine, Dept. of Surgery William J in Gas-Liquid Environment Laura W. Lund McGowan Institute for Regenerative Medicine, Dept. Federspiel McGowan Institute for Regenerative Medicine, Dept. of Chemical Engineering, Dept. of Surgery

  15. H A&S 220d Energy and Environment P.B.Rhines Spring 2009 Numbers and formulas

    E-Print Network [OSTI]

    . thermal energy of an ideal gas: CvT (Joules) where Cv is the specific heat capacity at constant volume = = 719 J/kg 0K thermal energy of solids and liquids is usually given as CpT where Cp is the specific heat capacity at constant pressure. For ice, Cp=2095 Joules/(kg 0C). For liquid water Cp = 4180 Joules/(kg 0C

  16. Very High Fuel Economy, Heavy Duty, Constant Speed, Truck Engine Optimized Via Unique Energy Recovery Turbines and Facilitated High Efficiency Continuously Variable Drivetrain

    SciTech Connect (OSTI)

    Bahman Habibzadeh

    2010-01-31T23:59:59.000Z

    The project began under a corporative agreement between Mack Trucks, Inc and the Department of Energy starting from September 1, 2005. The major objective of the four year project is to demonstrate a 10% efficiency gain by operating a Volvo 13 Litre heavy-duty diesel engine at a constant or narrow speed and coupled to a continuously variable transmission. The simulation work on the Constant Speed Engine started on October 1st. The initial simulations are aimed to give a basic engine model for the VTEC vehicle simulations. Compressor and turbine maps are based upon existing maps and/or qualified, realistic estimations. The reference engine is a MD 13 US07 475 Hp. Phase I was completed in May 2006 which determined that an increase in fuel efficiency for the engine of 10.5% over the OICA cycle, and 8.2% over a road cycle was possible. The net increase in fuel efficiency would be 5% when coupled to a CVT and operated over simulated highway conditions. In Phase II an economic analysis was performed on the engine with turbocompound (TC) and a Continuously Variable Transmission (CVT). The system was analyzed to determine the payback time needed for the added cost of the TC and CVT system. The analysis was performed by considering two different production scenarios of 10,000 and 60,000 units annually. The cost estimate includes the turbocharger, the turbocompound unit, the interstage duct diffuser and installation details, the modifications necessary on the engine and the CVT. Even with the cheapest fuel and the lowest improvement, the pay back time is only slightly more than 12 months. A gear train is necessary between the engine crankshaft and turbocompound unit. This is considered to be relatively straight forward with no design problems.

  17. Life-cycle Energy and Emissions Inventories for Motorcycles, Diesel Automobiles, School Buses, Electric Buses, Chicago Rail, and New York City Rail

    E-Print Network [OSTI]

    Chester, Mikhail; Horvath, Arpad

    2009-01-01T23:59:59.000Z

    Running)  V, Operation (Start)  V, Operation (Tire) V, Operation (Brake)  V, Automotive Repair  V, Automotive Repair  V, Evaporative Losses Running)  V, Operation (Start)  V, Operation (Tire) V, Operation (Brake)  V, Automotive Repair  V, Automotive Repair  V, Evaporative Losses Running)  V, Operation (Start)  V, Operation (Tire) V, Operation (Brake)  V, Automotive Repair  V, Automotive Repair  V, Evaporative Losses 

  18. advanced propulsion engine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Berdichevsky, Victor 123 Advances in Automobile Engineering: Brake Assisted Differential Locking System CiteSeer Summary: Abstract- It takes 8,460 bolts to...

  19. Oxygen-Enriched Combustion for Military Diesel Engine Generators...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Oxygen-Enriched Combustion for Military Diesel Engine Generators Oxygen-Enriched Combustion for Military Diesel Engine Generators Substantial increases in brake power and...

  20. Modeling And Control Of Articulated Vehicles

    E-Print Network [OSTI]

    Chen, Chieh; Tomizuka, Masayoshi

    1997-01-01T23:59:59.000Z

    Modeling, Advanced Vehicle Control Systems, Lateral control, SteeringSteering and Braking Control of Heavy Duty Vehicles. Under this project, dynamic modeling

  1. air mass flow: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    supported by externally pressured air bearing. The turbine with coupled brake centrifugal compressor, aerostatic radial and thrust bearing and test rig are developed for conducting...

  2. The Effect of Recent Trends in Vehicle Design on U.S. Societal Fatality Risk per Vehicle Mile Traveled, and Their Projected Future Relationship with Vehicle Mass

    E-Print Network [OSTI]

    Wenzel, Tom

    2014-01-01T23:59:59.000Z

    blocker beam”) Minivan Curtain airbag that deploys inrollovers Curtain side airbag Combo curtain/torso side airbag Torso side airbag Automated braking system

  3. automobile engineers: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    components, with main focus on the dramatically increasing intra-car- communication Zachmann, Gabriel 5 Advances in Automobile Engineering: Brake Assisted Differential Locking...

  4. DOE/LX/07-0092&D1 Secondary Document

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    formerly stored included capacitors, light ballasts, and liquid-filled potential transformers, brake shoes, speed increaser, recorders, portable handrails, carts, a metal...

  5. air coupled ultrasonic: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ultrasonic testing (ACUT) setup for the inspection of commercial carbon-carbon composite aircraft brake disks was developed in Intelligent Measurement and Evaluation...

  6. OVERVIEW ______ Sensors for Intelligent

    E-Print Network [OSTI]

    Wadley, Haydn

    are extensively applied in automobiles to control pollution, enhance fuel economy, implement anti-lock braking. For the interim, electromagnetic acoustic transducers (EMATs) show great promise as u

  7. Environmental Life-cycle Assessment of Passenger Transportation: A Detailed Methodology for Energy, Greenhouse Gas and Criteria Pollutant Inventories of Automobiles, Buses, Light Rail, Heavy Rail and Air

    E-Print Network [OSTI]

    Chester, Mikhail; Horvath, Arpad

    2007-01-01T23:59:59.000Z

    resting, running, and crankcase losses are disaggregated).Evaporative losses, primarily from running, resting, and hotRunning Startup Braking Tire Wear Evaporative Losses Idling

  8. Life-cycle Environmental Inventory of Passenger Transportation in the United States

    E-Print Network [OSTI]

    Chester, Mikhail V

    2008-01-01T23:59:59.000Z

    hot?soak,  resting,  running,  and  crankcase  losses  are Evaporative losses, primarily from running, resting, and Running  Startup  Braking  Tire Wear  Evaporative Losses 

  9. Environmental Life-cycle Assessment of Passenger Transportation: A Detailed Methodology for Energy, Greenhouse Gas and Criteria Pollutant Inventories of Automobiles, Buses, Light Rail, Heavy Rail and Air v.2

    E-Print Network [OSTI]

    Chester, Mikhail; Horvath, Arpad

    2008-01-01T23:59:59.000Z

    resting, running, and crankcase losses are disaggregated).Evaporative losses, primarily from running, resting, and hotRunning Startup Braking Tire Wear Evaporative Losses Idling

  10. Interaction of Ferromagnetic and Superconducting Permanent Magnets...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    permanent magnet track, was put into operation. A vehicle for 2 passengers, equipped with linear drive propulsion, a noncontact energy supply, a second braking system, and various...

  11. applied modal analysis: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    instability. Introduction Disc brake noise continues to be object of investigation for automotive-mail: francesco.massi@uniroma1.it Abstract In this paper, an experimental...

  12. Diesel Particulate Filter Technology for Low-Temperature and...

    Broader source: Energy.gov (indexed) [DOE]

    Methods Using Air Restriction Wastega te Compressor Intercooler Turbine Air Filter Pre-Turbo Throttle Exhaust brake VGT Intake Throttle CRT Method Selected Method Selected...

  13. Defining engine efficiency limits

    Broader source: Energy.gov (indexed) [DOE]

    waste energy in the exhaust where it may be recovered through a bottoming cycle, turbo-compounding, thermo-electrics, etc Brake Work Combustion Irreversibility Q o Remaining...

  14. User adaptation to injury protection systems: its effect on fatalities, and possible causes

    E-Print Network [OSTI]

    Grembek, Offer

    2010-01-01T23:59:59.000Z

    a six-year study. Accident Analysis & Prevention, 28(2):201—brake light systems. Accident Analysis & Prevention, 14:trafficsafetybe- havior. Accident Analysis & Prevention, 18(

  15. Development of Enabling Technologies for High Efficiency, Low...

    Broader source: Energy.gov (indexed) [DOE]

    for HCCI Engine Pumping Friction Brake power Exhaust energy Incomplete combustion Other heat loss Engine heat loss % of fuel energy Collaborations - External *Program...

  16. Climate and Transportation Solutions: Findings from the 2009 Asilomar Conference on Transportation and Energy Policy

    E-Print Network [OSTI]

    Sperling, Daniel; Cannon, James S.

    2010-01-01T23:59:59.000Z

    hybrid motor using braking energy or by a waste heat recovery system,source of energy. Long-haul hybrid systems can be effective

  17. Thermoelectrics: The New Green Automotive Technology

    Broader source: Energy.gov (indexed) [DOE]

    Compressed Air Module Supplies compressed air for brakes and ride control Electric Water Pump Higher reliability variable speed faster warm-up less white smoke lower cold...

  18. Adaptation of hybrid five-phase ABS algorithms for experimental validation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -lock braking, Hybrid control systems, Limit cycle analysis, Experimental validation, Quarter-car. 1Adaptation of hybrid five-phase ABS algorithms for experimental validation Mathieu Gerard WilliamAnti-lock Braking System (ABS) is the most important active safety system for passenger cars, but unfortunately

  19. IEEE Instrumentation and Measurement Technology Conference

    E-Print Network [OSTI]

    Gillespie, Brent

    , and light emitting diode brake- light messaging. These technologies all focus on improving the signal- ance, sensor, radar, fluorescence, light emitting diode. I. INTRODUCTION As a compromise between · Radar reflection-enhanced license plates · Vehicle-to-vehicle light emitting diode (LED) brake- light

  20. PROOF COPY 018405PHP Observation of tearing mode deceleration and locking due to eddy currents

    E-Print Network [OSTI]

    Fitzpatrick, Richard

    to eddy currents induced in a conducting shell B. E. Chapman Department of Physics, University 6, 3878 1999 in which a braking torque originates from eddy currents induced by the rotating mode, eddy currents induced in the conducting shell surrounding the plasma exert a braking torque

  1. IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 13, NO. 1, FEBRUARY 2008 1 Development of a Scaled Vehicle With Longitudinal

    E-Print Network [OSTI]

    Del Vecchio, Domitilla

    displacement of the flywheel (rad). i Angular displacement of the turbine (rad). t Angular displacement material (kg/m3 ). brake Brake torque (N·m). B Damping coefficient of transmission (kg/s). Rdcm DC motor motor (N·m). e Torque produced by the engine (N·m). It Transmission inertia (kg·m2 ). t Turbine torque

  2. On Steady-State Cornering Equilibria for Wheeled Vehicles with Drift Efstathios Velenis, Emilio Frazzoli and Panagiotis Tsiotras

    E-Print Network [OSTI]

    Tsiotras, Panagiotis

    wheel steering controller appeared in [14]. The authors of that work used a single-track vehicle model (independent braking control on all four wheels) [1], active steering [2], [3], and, more recently, via including differential braking, traction control, active steering and sus- pension. Alternative means

  3. LPV methods for fault-tolerant vehicle dynamic control Olivier Sename, Juan-Carlos Tudon-Martinez, Soheib Fergani

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of the semi-active suspension control problem and the yaw control using braking, steering and suspension gain-scheduled H vehicle dynamic stability controller, involving front steer- ing, rear braking and safety of vehicle occupants [1], [2]. Analysis, modeling and control of the overall vehicle dy- namics

  4. Associate Professor, Texas A&M University, College Station, TX 77843.5 HUMAN FACTORS

    E-Print Network [OSTI]

    Bertini, Robert L.

    may differ in performance. Next, the kind of control performance that underlies steering, braking on the development of adequate models of the tracking behavior fundamental to steering, much less so for braking g = acceleration of gravity g = control displacement(s) G = gradient H = information (bits) K = gain

  5. A. Galip Ulsoy, Mechanical Engineering Department! College of Engineering, University of Michigan at Ann Arbor!

    E-Print Network [OSTI]

    Ulsoy, A. Galip

    subsystem! ·" Role of the Driver! -" Driver state and uncertainty modeling! -" Robust steering assist! ·"Kalman filters! ·"control pressure to wheels for brake-steer! ·"Apple Quadra 800, Dell Pentium, I/O rack ! ·"several Kalman filters! ·"control of pressure to individual rear wheels for brake-steer! A high

  6. adopt our eco-driving top tips to reduce fuel costs

    E-Print Network [OSTI]

    Harman, Neal.A.

    situations and other road users as far ahead as possible to avoid unnecessary braking and acceleration without using the brakes. Step off the accelerator · When slowing down or driving downhill, remain in gear consumption. September 2012 TE803 Call our transport advice line on 0845 602 1425 or email transport

  7. Automated Validation of Software Models Steve Sims Rance Cleaveland

    E-Print Network [OSTI]

    Cleaveland, Rance

    Simulink R and six Stateflow R diagrams and has an implementation consisting of approximately 1000 lines to formulate and check application spe- cific properties such as Will a car's anti-lock brakes ever engage when the brake pedal is not pressed? Addition- ally, Salsa can serve as the engine for consistency check- ing [TR

  8. Dear Editor: It appears to me that the basic premise of Nancy Mead's article "Who is liable for

    E-Print Network [OSTI]

    Santini, Simone

    ." The second scenario is the following. "A is driving his car, a model X, when, suddenly, the brakes fail. In the second case, they can sue the manufacturer Y for the brake failure, while in the first case they must, my bank is selling my personal information without my permission, on-line merchants are collecting

  9. Exemplar of Automotive Architecture with Variability Kacper Bak, Marko Novakovic, Leonardo Passos

    E-Print Network [OSTI]

    Czarnecki, Krzysztof

    are assembled from physical components, such as engine, brakes, or lights. Modern cars, however, are software of such a system. It controls engine and brakes so that the car automatically maintains selected speed and keeps manufacturers have been using Software Product Lines (SPLs) to deliver car-specific software from a shared code

  10. Charles P. Shelton Philip Koopman

    E-Print Network [OSTI]

    Koopman, Philip

    of components per subsystemN k Proof of Concept: Scalable Specification of an example Brake- By-Wire system + + + + + Real-world electromechanical anti-lock braking system transformed to hypothetical embedded network a race course Combine line following sensor system with location tracking and navigation algorithms Run

  11. Seminar: Entwicklung eingebetteter Systeme Margot Bittner, Mark-Oliver Reiser

    E-Print Network [OSTI]

    Wichmann, Felix

    interactions ·Product lines and multi-tier organizations ·Mechanical engineering processes and organizations >100k Testfälle >100k Anforderungsobjekte Engine Mgmnt. System ETAS Brake Actuator Siemens Torqu e Mode_speed vehicle_speed engine _ torque rain_intensity accelerator_pedal_request brake_torque brak e_

  12. Charles P. Shelton Philip Koopman

    E-Print Network [OSTI]

    Koopman, Philip

    of components per subsystemN k Proof of Concept: Scalable Specification of an example Brake- By-Wire system + + + + + Real-world electromechanical anti-lock braking system transformed to hypothetical embedded network Systems GM Autonomous Robot Navigation: + + Combine line following sensor system with location tracking

  13. Norges teknisk naturvitenskapelige universitet

    E-Print Network [OSTI]

    Langseth, Helge

    on the last page in the problem set shows observed lifetimes for brake pads for a random sample of 40 cars = mixed driving The 40 observations, each represented by a line in the table, are assumed of independent censoring for the brake pad data of this problem set. Can one in this situation also suspect

  14. A Methodology for the Development of Novel VANET Safety Applications1

    E-Print Network [OSTI]

    Wolfson, Ouri E.

    .edu, {boxu,wolfson}@cs.uic.edu Jie Lin Department of Civil and Materials Engineering University of Illinois. Examples of such applications include the emergency electronic brake light or the highway merge warning the Electronic Emergency Brake Lights (EEBL), the Highway Merge Warning (HMW), and the Control Loss Warning (CLW

  15. Department of Mechanical and Nuclear Engineering Spring 2011 KYDEX LLC, 1

    E-Print Network [OSTI]

    Demirel, Melik C.

    process. Capping is applied to the KYDEX material to provide protection and/or add decorative patterns. Currently, the tension is controlled by manually adjusting the air brake on the feed roller. The brake must accurately measure the tension on the capping material. The system should be able to automatically adjust

  16. Complex Embedded Automotive Control Systems DaimlerChrysler

    E-Print Network [OSTI]

    Duffy, Ken

    progressed along several lines of inquiry, it appears to be the case that almost no effort has been devoted equipped with active systems (4-wheel- steering, active suspension, active brakes, etc.) may, in principle and rear steer-by-wire, brake-by-wire and active suspensions. An integrated chassis controller would com

  17. Comprehensive Experimental Analyses of Automotive Attack Surfaces Stephen Checkoway, Damon McCoy, Brian Kantor,

    E-Print Network [OSTI]

    Hu, Fei

    -computerized attacks as well (e.g., cutting the brake lines). This situation suggests a significant gap in knowledge distributed com- puter systems comprising millions of lines of code execut- ing on tens of heterogeneous network can circumvent all computer control systems, including safety critical elements such as the brakes

  18. IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 7, NO. 2, MARCH 1999 271 Sliding Mode Measurement Feedback Control

    E-Print Network [OSTI]

    Kachroo, Pushkin

    Measurement Feedback Control for Antilock Braking Systems Cem ¨Unsal, Member, IEEE, and Pushkin Kachroo, R. Takahashi. This material is based upon work supported by VDOT and Virginia Tech's Center of vehicle motion and stability by providing anti-skid braking and anti- spin acceleration. The design

  19. http://www.cs.ucsb.edu/~sherwood/RCsec/ CyberTrust PI Meeting

    E-Print Network [OSTI]

    . Blurring the line between software and hardware, reconfigurable hardware offers the raw high speed such as flight control and anti-lock braking, an adversary or rogue nation could potentially craft a soft core functions have different levels of trust (for example the anti-lock brakes and the MP3 player in your car

  20. Chapter 9 -Forklift Operations Forklift Operations Safety Rules

    E-Print Network [OSTI]

    that horn, lights, brakes, tires, gas supply, hydraulic lines, etc. are in safe working condition. Employees as a brake. 10. Forklifts should be driven on the right side of the road or aisle-way. 11. Operators shall the surface. 28. Use extra care when handling long lengths of bar stock, pipe, or other materials. 29. Avoid

  1. 10/06/09 10:24 AMUntitled Page 1 of 1

    E-Print Network [OSTI]

    Flynn, Morris R.

    as a single driver tapping lightly on the brakes inadvertently starting a chain reaction of over-braking by drivers in the following vehicles. Eventually a long line of traffic comes to a complete stop. On major materials provided by University of Alberta, via EurekAlert!, a service of AAAS. Need to cite this story

  2. Numerical study of friction-induced instability and acoustic radiation -Effect of ramp loading on the

    E-Print Network [OSTI]

    Boyer, Edmond

    is conducted for two cases of loadings and initial conditions: a static load near the associated sliding harmonic components in the velocity spectrum. Finally, the sound pressure convergence study shows that only a frictional interface [1]. During the braking process of a disc brake system, a hydraulic pressure is applied

  3. Dependability characteristics and safety criteria for an

    E-Print Network [OSTI]

    Johansson, Roger

    in centralized control. Such systems are referred to as Automatic Train Control (ATC) systems [1]. For simplicityDependability characteristics and safety criteria for an embedded distributed brake control system distributed brake control system in railway freight trains ROGER JOHANSSON1 Department of Electrical

  4. Vegetative regeneration in selected south Texas shrubs

    E-Print Network [OSTI]

    Flinn, Robert C.

    1986-01-01T23:59:59.000Z

    . Study Site. Regenerative Structure Description. Sprouting Potential of Roots. Motte Regeneration. Regrowth Comparison. Shrub Stem Classification. . 13 . . . 14 16 17 17 18 RESULTS AND DISCUSSION. Regenerative Morphology Desert Yaupon Lime... varying regenerative responses of south Texas shrubs following burning. Lime pricklyash (~n~xlum tacaara (L. ) Sarg. ) suffered the least mortality (4%) while the highest mortality (40%) occurred with lotebush. Lime pricklyash sprouted vigorous- ly...

  5. Energy Conservation in Process Heaters

    E-Print Network [OSTI]

    Bagge, R. W.

    1982-01-01T23:59:59.000Z

    The basic concepts of air preheating as familiar from boiler plants can be used in process heaters. These systems are (1): - direct air preheaters a. recuperative b. regenerative indirect air preheating - air preheating with an outside hot stream... preheating system added to eXixting crude oil heater. 42 ESL-IE-82-04-08 Proceedings from the Fourth Industrial Energy Technology Conference Houston, TX, April 4-7, 1982 Regenerative air preheaters The regenerative or the Ljungstrom air preheater...

  6. Durability of Diesel Particulate Filters (Agreement ID:10461...

    Broader source: Energy.gov (indexed) [DOE]

    6 2013 AMR Relevance to barriers * Impact on barriers: Property data generated by this CRADA... - Provides necessary input for models to predict DPF regen behavior accurately. In...

  7. Qualifying Vehicles for Low Emitting, Fuel Efficient Vehicle Discount (50 points or better)

    E-Print Network [OSTI]

    Nelson, Tim

    MH batteries) +1 ZEV 2.9 3.3 52 2001 01_TS HONDA INSIGHT 1.0L 3, manual ULEV I 61 68 53 2001 01_TS HONDA INSIGHT 1.0L 3, manual LEV I 61 68 52 2001 02_SUB HONDA CIVIC GX 1.7L 4, auto [CNG] SULEV II 31 34 53 2002 01_TS HONDA INSIGHT 1.0L 3, auto CVT SULEV II 57 56 57 2002 01_TS HONDA INSIGHT 1.0L 3, manual ULEV I

  8. Report: Information on Seeking Jobs in Philosophy

    E-Print Network [OSTI]

    Helstrom, Kenneth

    University of America Washington, D. C. 20017 4. Application Procedures and Strategy! 4.1 Letter and CVt The first contact is normally by the letter of ap­ plication accompanied by a CV. Hence certain observations about these should be obvious. But... they have finished their letters. 2.3 Letter of Application Upon learning of a vacancy a letter of application and a curriculum vitae (CV) will be dispatchedj this is normally the first contact. For this reason some thought should be given to these two...

  9. Capacitance-based prover for gas flow meters

    E-Print Network [OSTI]

    Pipkins, Sean Patrick

    1995-01-01T23:59:59.000Z

    ;?= enthalpy of the air at the inlet. H Uo =U +RT Uo =Cv(T To)+RT, (36) 24 Equation (35) can be written as c (T-T)=[c (T?? T)+RT. , ?] Il ? ' n j (37) Solving Equation (37) for T gives the equation used to calculate the temperature profiles of the air.... . . . . Relation of Capacitance Change to Molar Flow Rate. DiIferential Method Integral Method THEORETICAL CALCULATIONS. Calculated C. Experimental C. Thermal Expansion Effects . . Capacitance Change Due to Length Change Capacitance Change Due to Radius...

  10. Estrogen and cyclic amp action, and the involvement of the cytoskeleton on gap junction formation in rat myometrium

    E-Print Network [OSTI]

    Gaddy, Dana

    1985-01-01T23:59:59.000Z

    ), (-)-isoproterenol (ISO), and dl-propranolol (PROP) were purchased from Sigma Chemical Co. (St. Louis, MO). Prostaglandin F2o (PGF) was used as the dinoprost tromethamine salt in Lutalyse (Upjohn, kalamazoo, liI). Dulbecco's phosphate buffered saline (PBS... studies are listed in I'able I. E2B was dissolved in sesame oil. ISO, PROP, COL, CVT. B, and PGEI were dissolved in Du lbecco's VBS. PGF was given in 1 mg doses. All injections were delivered intraperitoneal ly in 200 ul volumes of hormone carrier...

  11. massgeneralforchildren.org | 888-644-3211 PAGE ONE CascadesFALL 2011 NEWSLETTER TO PHYSICIANS

    E-Print Network [OSTI]

    Mootha, Vamsi K.

    Tissue Engineering and Regenerative Medicine: Progress toward alleviating donor organ shortages Continued Medicine have brought the field closer to engineering entire living organs that are free that goal, says Joseph P. Vacanti, MD, deputy director of the Center for Regenerative Medicine and surgeon

  12. PhD studentship: Development of novel Biomaterials based on low molecular

    E-Print Network [OSTI]

    Chittka, Lars

    - Assembling Supramolecular Nanostructured Gel-Phase Materials: From Regenerative Medicine to Electronic in regenerative medicine but more of such materials are required to prepare synthetic ECMs for applications in multidisciplinary research, namely organic synthesis, material science and cell biology. Training will be provided

  13. Inventory processes: Quasiregenerative property,

    E-Print Network [OSTI]

    Rubinstein, Reuven

    Inventory processes: Quasi­regenerative property, performance evaluation and sensitivity estimation­commodity, discrete­time, multiperiod (s; S)­ policy inventory model with backlog. The cost function may contain that the resulting inventory process is quasi­regenerative, i.e. admits a cycle decomposition and indicate how

  14. Monica Y. Garcia Department of Bioengineering,

    E-Print Network [OSTI]

    Federspiel, William J.

    Monica Y. Garcia Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA Brack G. Hattler McGowan Institute for Regenerative Medicine, Department of Surgery, University of Pittsburgh, Pittsburgh, PA William J. Federspiel McGowan Institute for Regenerative Medicine, Department of Chemical

  15. Optimization of hybrid dynamic/steady-state processes using process integration

    E-Print Network [OSTI]

    Grooms, Daniel Douglas

    2009-06-02T23:59:59.000Z

    ................................................................................... 34 4.5 Conclusions.................................................................................. 37 vii CHAPTER Page V OPTIMAL DESIGN AND SCHEDULING OF SEMI-BATCH ADSORPTIVE/REGENERATIVE SYSTEMS FOR INDUSTRIAL WATER PURIFICATION... Regenerant-to-MSA ratio RXS Flowrate of regenerant in excess of stoichiometric amount Regen Binary regeneration variable RelaxationDeviation Integer relaxation penalty term SINKS Set of sinks SOURCES Set of sources SS Subset of steady...

  16. Characterization of Two-Photon Excitation: Coherent Control and Nonlinear Propagation in Transparent Media

    E-Print Network [OSTI]

    Poudel, Milan Prasad

    2010-10-12T23:59:59.000Z

    CEO detection [26]. .....................................................................16 2.7 Beat signal from the Rainbow oscillator (35 dB)...........................................16 2.8 Regenerative Cavity [23... inside a stretcher by separating in time its Fig. 2.3. Schematic of the (a) grating stretcher and (b) grating compressor b)a) 12 frequency components. Then this pulse is directed into the amplifier regenerative cavity...

  17. Artificial Organs 30(9):657664, Blackwell Publishing, Inc.

    E-Print Network [OSTI]

    Federspiel, William J.

    correspondence and reprint requests to Dr.William R. Wagner, McGowan Institute for Regenerative Medicine, 100 J. Frankowski, §Brack G. Hattler, *§William J. Federspiel, and *§William R. Wagner *Bioengineering Department, University of Pittsburgh; McGowan Institute for Regenerative Medicine, University of Pittsburgh

  18. Physical sectioning in 3D biological microscopy

    E-Print Network [OSTI]

    Guntupalli, Jyothi Swaroop

    2008-10-10T23:59:59.000Z

    ...................................................................... 61 G Stepan’s models of regenerative chatter in metal cutting........................... 62 H Chatter model for KESM............................................................................ 64 ix CHAPTER Page I Summary... based on the source of vibration: frictional, regenerative, mode-coupling, and thermo-mechanical [7]. Frictional chatter gets its excitation energy from the friction force either between the workpiece and the tool 15 flank, or between the section...

  19. Cell Stem Cell Highly Efficient Reprogramming

    E-Print Network [OSTI]

    Collins, James J.

    Alexander Meissner,4,5,14 George Q. Daley,2,3,4,5,8,15,16 Andrew S. Brack,5,6 James J. Collins,11,12,15 Chad Children's Hospital Boston, Boston, MA 02115, USA 4Department of Stem Cell and Regenerative Biology 5Harvard Stem Cell Institute Harvard University, Cambridge, MA 02138, USA 6Center of Regenerative Medicine

  20. Physical sectioning in 3D biological microscopy

    E-Print Network [OSTI]

    Guntupalli, Jyothi Swaroop

    2009-05-15T23:59:59.000Z

    ...................................................................... 61 G Stepan?s models of regenerative chatter in metal cutting........................... 62 H Chatter model for KESM............................................................................ 64 ix CHAPTER Page I Summary... based on the source of vibration: frictional, regenerative, mode-coupling, and thermo-mechanical [7]. Frictional chatter gets its excitation energy from the friction force either between the workpiece and the tool 15 flank, or between the section...

  1. Femtosecond time-resolved spectroscopy of coherent oscillations in nanomaterials

    E-Print Network [OSTI]

    Jerebtsov, Serguei Nikolaevich

    2009-05-15T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . 16 2. Regenerative amplifier . . . . . . . . . . . . . . . . . . 17 C. Transient Transmission Part . . . . . . . . . . . . . . . . . 19 III COHERENT ACOUSTIC VIBRATIONS IN NANOPARTI- CLES AND NANOWIRES ..................... 22 A. Optical Properties.... ................... 7 3 Kerr-lensing effect. ............................ 9 4 Principle of a CPA process. ....................... 10 5 Schematic of the grating stretcher a) and compressor b). ....... 11 6 Regenerative cavity. ........................... 12 7 Schematic...

  2. Suppliers List for the Florida Shellfish Industry Revised: February 2010 by FDACS Division of Aquaculture (Dan Cavins)

    E-Print Network [OSTI]

    Florida, University of

    Products (Chris Josten, Graphic Designer) 209 Reid Avenue Port St. Joe, FL 32456 Phone: 850-227-7468 Fax;2 Industrial Supplies (Regenerative blowers, filters, motors, pumps, etc.) Regenerative Blowers (also called ring compressors, vortex blowers, or side channel blowers) are designed for low pressure/high flow

  3. CEE 4020 -Computer Applications in CEE Introduction to Civil 3D: Environment and Drawing Settings

    E-Print Network [OSTI]

    Mukherjee, Amlan

    to label a line segment - choose the lines around Single-Family : 8: Note Line label Style · Find Line property · Regenerate after each change in settings using the regen command. Using Styles Hierarchy. · Regenerate using the regen command. 1 #12;2 Drawing Settings, Viewport Scaling and Text Size Objective

  4. Just build it! : a fully functional concept vehicle using robotic wheels

    E-Print Network [OSTI]

    Schmitt, Peter, S.M. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    Interest in electric vehicle drive units is resurging with the proliferation of hybrid and electric vehicles. Currently emerging key-technologies are: in-wheel motors, electric braking, integrated steering activators and ...

  5. THE CITY UNIVERSITY OF NEW YORK Classified Civil Service Position Description

    E-Print Network [OSTI]

    Rosen, Jay

    automotive and construction activities and all other equipment powered by internal combustion engines, - Overhauls and makes repairs to internal combustion engines, brake systems, automatic and manual and Responsibilities Under supervision, overhauls, repairs and maintains engines and components assembles used un

  6. Crevice volume effect on spark ignition engine efficiency

    E-Print Network [OSTI]

    Smith, Patrick M. (Patrick Michael)

    2013-01-01T23:59:59.000Z

    A set of experiments and a simulation study are completed to quantify the effect of the piston crevice on engine efficiency. The simulation study breaks down the loss mechanisms on brake efficiency at different displacement ...

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

    E-Print Network [OSTI]

    Dimou, Iason

    2011-01-01T23:59:59.000Z

    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 ...

  8. CONTAMINANT MONITORING AND RESEARCH SANFRANCISCOESTUARYINSTITUTE

    E-Print Network [OSTI]

    District Brake Pad Steering Committee Rodger Dabish, TMD Friction, Inc. Michael Endicott, for the Sierra Club Tim Merkel, Ph.D., for friction material manufacturers Kelly Moran, Ph.D., for BASMAA Jim.................................................................................. 12 3.5 Dry Deposition

  9. Exascale for Energy: The Role of Exascale Computing in Energy Security

    E-Print Network [OSTI]

    Authors, Various

    2010-01-01T23:59:59.000Z

    2010. Exascale for Energy Carbon capture and sequestration:brakes on CO 2 emissions Carbon capture and sequestration—necks for large-scale carbon capture and seques- tration.

  10. SUPPORTING INFORMATION for Modeling the Atmospheric Transport and Deposition

    E-Print Network [OSTI]

    , James Quigley, Joyce E. Rosenthal1 Center for the Biology of NaturalSystems, Queens College, Flushing Mathewson-Brake Ontario Ministry of Natural Resources, Peterborough, Ontario, Canada John . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 M. Summary of Sensitivity Analyses. . . . . . . . . . . . . . . . . . . . . . . . . . . 42 N

  11. Maintenance Records for 2010 Honda Insight EX vin 0141

    Broader source: Energy.gov (indexed) [DOE]

    Insight EX VIN JHMZE2H78AS010141 Date Mileage Description Cost 12102009 5,947 Changed oil and filter and inspected brake system 30.44 252010 11,011 Changed oil and filter and...

  12. Maintenance Records for 2010 Toyota Prius vin#0462

    Broader source: Energy.gov (indexed) [DOE]

    DU2A5010462 Date Mileage Description Cost 11232009 5,935 Changed oil and filter, rotated tires, and inspected brakes 31.75 12182009 13,330 Changed oil and filter and inspected...

  13. Maintenance Records for 2010 Ford Fusion vin#4757

    Broader source: Energy.gov (indexed) [DOE]

    Ford Fusion VIN 3FADP0L34AR144757 Date Mileage Description Cost 1142010 6,330 Changed oil and filter and inspected brake system 46.83 2112010 12,302 Changed oil and filter...

  14. Overview of the Advanced Combustion Engine R&D

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    high-efficiency engines using hydrocarbon-based (petroleum and non-petroleum) fuels and hydrogen Light-Duty Heavy-Duty 2010 2015 2015 2018 Engine brake thermal efficiency 45% 50%...

  15. Apparatus for stopping a vehicle

    DOE Patents [OSTI]

    Wattenburg, Willard H. (Walnut Creek, CA); McCallen, David B. (Livermore, CA)

    2007-03-20T23:59:59.000Z

    An apparatus for externally controlling one or more brakes on a vehicle having a pressurized fluid braking system. The apparatus can include a pressurizable vessel that is adapted for fluid-tight coupling to the braking system. Impact to the rear of the vehicle by a pursuit vehicle, shooting a target mounted on the vehicle or sending a signal from a remote control can all result in the fluid pressures in the braking system of the vehicle being modified so that the vehicle is stopped and rendered temporarily inoperable. A control device can also be provided in the driver's compartment of the vehicle for similarly rendering the vehicle inoperable. A driver or hijacker of the vehicle preferably cannot overcome the stopping action from the driver's compartment.

  16. A Model-Driven Approach for Generating Embedded Robot Navigation Control Software

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    , which is symbolically represented as an area contaminated with hazardous materials (e.g., land mines engines and brakes, chemical factories, and avionics applications. In fact, it has been reported that over

  17. Mechanical Proofs about Computer Programs Technical Report #41

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    shuttle fails to launch. An entire line of automobiles is recalled because of problems with the software that controls the braking system. Unauthorized users get access to computer systems. Sensitive information

  18. A University of Alabama Low-Cost Diamond-Coated Tools

    E-Print Network [OSTI]

    Carver, Jeffrey C.

    composite engineered materials have Heat pipe Tool tip­ Metal-matrix composite engineered materials have (with heat pipe) Tool tip potential for engine pistons, brake parts, driveshafts, etc. ­ Machining must

  19. NOTTINGHAM TRENT UNIVERSITY -INVESTING IN EXCELLENCE VICE-CHANCELLOR'S PHD SCHOLARSHIP SCHEME & SCHOOL PHD SCHOLARSHIP SCHEME

    E-Print Network [OSTI]

    Evans, Paul

    of the material and to assess the development of understanding using the new approach. At a time of national-university laboratory', Physics Education, 41(6), November 2006, pp556-559. Ireson G and Twidle J Magnetic braking

  20. Experiences in Applying Formal Verification in Robotics

    E-Print Network [OSTI]

    Lüth, Christoph - Deutschen Forschungszentrum für Künstliche Intelligenz & Fachbereich 3

    and certifying a safety function for autonomous vehicles and robots. We out- line the algorithm which such as the area covered by a braking robot in our case, play a central role. This leads to an increase

  1. Mechanical Proofs about Computer Programs Technical Report #41

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    in unpredictable ways. A space shuttle fails to launch. An entire line of automobiles is recalled because of problems with the software that controls the braking system. Unauthorized users get access to computer

  2. Antonio Diaz-Calderon Jet Propulsion Laboratory

    E-Print Network [OSTI]

    Kelly, Alonzo

    @jpl.nasa.gov Alonzo Kelly The Robotics Institute Carnegie Mellon University On-Line Stability Margin and Attitude which move heavy loads, accelerate or brake aggressively, turn at speed, or operate on sloped terrain

  3. Steve Wright School of Computing

    E-Print Network [OSTI]

    Leeds, University of

    the effect of fatigue on driver atten- tion, event traf c might be scripted to form a stationary line ahead of the subject driver to measure the reaction time of the driver's braking responses (Ward, 1997). The second

  4. Techniques for developing verified concurrent programs based on monitors and semaphores

    E-Print Network [OSTI]

    Peters, Dennis

    course instructors of Memorial University for their valu- able lectures and course materials which of Engineering and Applied Science and Gerard Brake, ECE, for their administrative and technical as- sistance

  5. Computer-Aided Verification: How to Trust a Machine with Your Life

    E-Print Network [OSTI]

    Pace, Gordon J.

    are used to control all sorts of devices -- from washing machines and microwave ovens to braking systems is formidable. The formal verification of a five-line algorithm can easily run into pages of dense mathematical

  6. WABCO Automotive UK Ltd is part of American Standard Companies Inc. One

    E-Print Network [OSTI]

    Berzins, M.

    automotive products companies, it supplies braking and other control systems to the commercial vehicle and the Institute for Materials Research. RESULTS Research and teaching benefited, with WABCO product studies

  7. Reducing Rally Car Damage in Forests Partnership-working with the

    E-Print Network [OSTI]

    also incurs heavy costs when repairing the road surfaces after an event. The damage caused by motor driving, fast cornering, heavy braking and rapid acceleration causes significant damage to the loose prevent oil or f

  8. Gravity Train Project

    E-Print Network [OSTI]

    Dec 7, 2013 ... As soon as the brakes of a railroad car in West Lafayette are released, the car will roll down under the force of gravity. It will accelerate, then ...

  9. Fluid Dynamics Seminar Fluid Dynamics Research Centre

    E-Print Network [OSTI]

    Davies, Christopher

    France) 8th Nov. Future Trends in Condition Monitoring of Rotating Machines Using System Identification Simulation of the Cooling of a Simplified Brake Disc Dr. Thorsten J. Möller, (Institute for Fluid Mechanics

  10. Fluid Dynamics Seminar Fluid Dynamics Research Centre

    E-Print Network [OSTI]

    Thomas, Peter J.

    France) 8 th Nov. Future Trends in Condition Monitoring of Rotating Machines Using System Identification Simulation of the Cooling of a Simplified Brake Disc Dr. Thorsten J. Möller, (Institute for Fluid Mechanics

  11. Tyre modelling for use in vehicle dynamics studies

    SciTech Connect (OSTI)

    Bakker, E.; Nyborg, L.; Pacejka, H.B.

    1987-01-01T23:59:59.000Z

    A new way of representing tyre data obtained from measurements in pure cornering and pure braking conditions has been developed in order to further improve the Dynamic Safety of vehicles. The method makes use of a formula with coefficients which describe some of the typifying quantities of a tyre, such as slip stiffnesses at zero slip and force and torque peak values. The formula is capable of describing the characteristics of side force, brake force and self aligning torque with great accuracy. This mathematical representation is limited to steady-state conditions during either pure cornering or pure braking and forms the basis for a model describing tyre behaviour during combined braking and cornering.

  12. About Zonar Systems Based in Seattle, Washington, Zonar is a leading provider of electronic

    E-Print Network [OSTI]

    Fisher, Kathleen

    to critical inspection zones on the vehicle. At each site the driver enters the condition of the tires, brakes buses and waste and recycling vehicles. "Zonar is really unique. There's nobody that does the breadth

  13. PHYS 101 Lecture 26 -Pascal's Principle 26 -1 2001 by David Boal, Simon Fraser University. All rights reserved; further copying or resale is strictly prohibited.

    E-Print Network [OSTI]

    Boal, David

    's important: · Pascal's principle Demonstrations: · Pascal's vases; books-on-a-bag (hydraulic press) Static. Pascal's principle underlies the operation of the hydraulic press, car brakes, etc. F same P everywhere F

  14. Introduction to special section on the Phoenix Mission: Landing Site Characterization Experiments, Mission Overviews, and

    E-Print Network [OSTI]

    Duck, Thomas J.

    braking strategy. After a safe landing, twin fan-like solar panels are unfurled and provide the energy. 5 Department of Earth Sciences, University of Bristol, Bristol, UK. 6 Lockheed Martin, Littleton

  15. Examining the Effects of Variability in Average Link Speeds on Estimated Mobile Source Emissions and Air Quality

    E-Print Network [OSTI]

    Sogutlugil, Mihriban

    2005-01-01T23:59:59.000Z

    running evaporative (or running loss), starts/parks, idle,diurnal, resting loss, running loss, tire- and brake-wearOn-Road Diesel Exhaust Running Losses The SCCs are based on

  16. Notes 12. (a) Annular pressure (damper) seals, and (b) Hydrostatic journal bearings

    E-Print Network [OSTI]

    San Andres, Luis

    2009-01-01T23:59:59.000Z

    The mechanism of centering stiffness in seals. Force coefficients for short-length pressure seals. Design of annular seals: swirl brakes, impact on rotordynamics. Hydrostatic bearings in modern applications. The principle of hydrostatic lubrication...

  17. Emission Reduction and Assisted Combustion Strategies for Compression Ignition Engines with Subsequent Testing on a Single-Cylinder Engine

    E-Print Network [OSTI]

    Ragone, Colter

    2012-08-31T23:59:59.000Z

    temperatures, while decreasing brake specific PM due to increased turbulence. Resulting performance calculations displayed a slight increase in fuel consumption. Chapter three analyzes the effects of ozone-assisted combustion on a single cylinder diesel engine...

  18. Legislation & Embedded Fundamental Ambiguities in

    E-Print Network [OSTI]

    Classify These? Fuel injectors Anti-lock brakes Hot water heater control Refrigerator control Home destroy the software industry." Step-Saver Data Systems, Inc. v. Wyse Technology and The Software Link

  19. Motorized control for mirror mount apparatus

    DOE Patents [OSTI]

    Cutburth, Ronald W. (Tracy, CA)

    1989-01-01T23:59:59.000Z

    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.

  20. Research and Development of High-Power and High-Energy Electrochemical Storage Devices

    SciTech Connect (OSTI)

    No, author

    2014-04-30T23:59:59.000Z

    The accomplishments and technology progressmade during the U.S. Department of Energy (DOE) Cooperative Agreement No. DE-FC26- 05NT42403 (duration: July 11, 2005 through April 30, 2014, funded for $125 million in cost- shared research) are summarized in this Final Technical Report for a total of thirty-seven (37) collaborative programs organized by the United States Advanced Battery Consortium, LLC (USABC). The USABC is a partnership, formed in 1991, between the three U.S. domestic automakers Chrysler, Ford, and General Motors, to sponsor development of advanced high-performance batteries for electric and hybrid electric vehicle applications. The USABC provides a unique opportunity for developers to leverage their resources in combination with those of the automotive industry and the Federal government. This type of pre-competitive cooperation minimizes duplication of effort and risk of failure, and maximizes the benefits to the public of the government funds. A major goal of this program is to promote advanced battery development that can lead to commercialization within the domestic, and as appropriate, the foreign battery industry. A further goal of this program is to maintain a consortium that engages the battery manufacturers with the automobile manufacturers and other key stakeholders, universities, the National Laboratories, and manufacturers and developers that supply critical materials and components to the battery industry. Typically, the USABC defines and establishes consensus goals, conducts pre-competitive, vehicle-related research and development (R&D) in advanced battery technology. The R&D carried out by the USABC is an integral part of the DOE’s effort to develop advanced transportation technologies that will significantly improve fuel economy, comply with projected emissions and safety regulations, and use domestically produced fuels. The USABC advanced battery development plan has the following three focus areas: 1. Existing technology validation, implementation, and cost reduction. 2. Identification of the next viable technology with emphasis on the potential to meet USABC cost and operating temperature range goals. 3. Support high-risk, high-reward battery technology R&D. Specific to the Cooperative Agreement DE- FC26-05NT42403, addressing High-Energy and High Power Energy Storage Technologies, the USABC focus was on understanding and addressing the following factors (listed in priority of effort): • Cost: Reducing the current cost of lithium- ion batteries (currently about 2-3 times the FreedomCAR target ($20/kW). • Low Temperature Performance: Improving the discharge power and removing lithium plating during regenerative braking. • Calendar Life: Achieving 15-year life and getting accurate life prediction. • Abuse Tolerance: Developing a system level tolerance to overcharge, crush, and high temperature exposure. This Final Technical Report compilation is submitted in fulfillment of the subject Cooperative Agreement, and is intended to serve as a ready-reference for the outcomes of following eight categories of projects conducted by the USABC under award from the DOE’s Energy Efficiency and Renewable Energy ) Vehicle Technologies Program: USABC DoE Final Report – DoE Cooperative Agreement DE-FC26-95EE50425 8 Protected Information 1. Electric Vehicle (EV) (Section A of this report) 2. Hybrid Electric Vehicle (HEV) (Section B 3. Plug-In Hybrid Electric Vehicle (PHEV) (Section C) 4. Low-Energy Energy Storage Systems (LEESS) (Section D) 5. Technology Assessment Program (TAP) (Section E) 6. Ultracapacitors (Section F) 7. 12 Volt Start-Stop (Section G) 8. Separators (Section H) The report summarizes the main areas of activity undertaken in collaboration with the supplier community and the National Laboratories. Copies of the individual supplier final reports are available upon request. Using project gap analysis versus defined USABC goals in each area, the report documents known technology limits and provides direction on future areas of technology and performance needs for vehicle applicatio