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Title: A review of dynamic characteristics of magnetically levitated vehicle systems

Abstract

The dynamic response of magnetically levitated (maglev) ground transportation systems has important consequences for safety and ride quality, guideway design, and system costs. Ride quality is determined by vehicle response and by environmental factors such as humidity and noise. The dynamic response of the vehicles is the key element in determining ride quality, while vehicle stability is an important safety-related element. To design a guideway that provides acceptable ride quality in the stable region, vehicle dynamics must be understood. Furthermore, the trade-off between guideway smoothness and levitation and control systems must be considered if maglev systems are to be economically feasible. The link between the guideway and the other maglev components is vehicle dynamics. For a commercial maglev system, vehicle dynamics must be analyzed and tested in detail. This report, which reviews various aspects of the dynamic characteristics, experiments and analysis, and design guidelines for maglev systems, discusses vehicle stability, motion dependent magnetic force components, guideway characteristics, vehicle/ guideway interaction, ride quality, suspension control laws, aerodynamic loads and other excitations, and research needs.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
219431
Report Number(s):
ANL-95/38
ON: DE96008244
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Nov 1995
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 66 PHYSICS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; LEVITATED TRAINS; DYNAMICS; RAILWAYS; STATISTICAL MODELS; AERODYNAMICS; FATIGUE; DRAG

Citation Formats

Cai, Y., and Chen, S.S.. A review of dynamic characteristics of magnetically levitated vehicle systems. United States: N. p., 1995. Web. doi:10.2172/219431.
Cai, Y., & Chen, S.S.. A review of dynamic characteristics of magnetically levitated vehicle systems. United States. doi:10.2172/219431.
Cai, Y., and Chen, S.S.. 1995. "A review of dynamic characteristics of magnetically levitated vehicle systems". United States. doi:10.2172/219431. https://www.osti.gov/servlets/purl/219431.
@article{osti_219431,
title = {A review of dynamic characteristics of magnetically levitated vehicle systems},
author = {Cai, Y. and Chen, S.S.},
abstractNote = {The dynamic response of magnetically levitated (maglev) ground transportation systems has important consequences for safety and ride quality, guideway design, and system costs. Ride quality is determined by vehicle response and by environmental factors such as humidity and noise. The dynamic response of the vehicles is the key element in determining ride quality, while vehicle stability is an important safety-related element. To design a guideway that provides acceptable ride quality in the stable region, vehicle dynamics must be understood. Furthermore, the trade-off between guideway smoothness and levitation and control systems must be considered if maglev systems are to be economically feasible. The link between the guideway and the other maglev components is vehicle dynamics. For a commercial maglev system, vehicle dynamics must be analyzed and tested in detail. This report, which reviews various aspects of the dynamic characteristics, experiments and analysis, and design guidelines for maglev systems, discusses vehicle stability, motion dependent magnetic force components, guideway characteristics, vehicle/ guideway interaction, ride quality, suspension control laws, aerodynamic loads and other excitations, and research needs.},
doi = {10.2172/219431},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1995,
month =
}

Technical Report:

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  • The dynamic response of magnetically levitated (maglev) ground transportation systems has important consequences for safety and ride quality, guideway design, and system costs. Ride quality is determined by vehicle response and by environmental factors such as humidity and noise. The dynamic response of the vehicles is the key element in determining ride quality, while vehicle stability is an important safety related element. To design a guideway that provides acceptable ride quality in the stable region, vehicle dynamics must be understood. Furthermore, the trade off between guideway smoothness and levitation and control systems must be considered if maglev systems are tomore » be economically feasible. The link between the guideway and the other maglev components is vehicle dynamics. For a commercial maglev system, vehicle dynamics must be analyzed and tested in detail. This report, which reviews various aspects of the dynamic characteristics, experiments and analysis, and design guidelines for maglev systems, discusses vehicle stability, motion dependent magnetic force components, guideway characteristics, vehicle/ guideway interaction, ride quality, suspension control laws, aerodynamic loads and other excitations, and research needs.« less
  • An analytical and experimental evaluation was made of the stability and dynamic characteristics of a small scale magnetically levitated vehicle. The vehicle was levitated over a variety of guideway perturbations in an attempt at stimulating unstable modes of oscillation. No instabilities developed in the five degrees of freedom measured using either passive or active damping. The analytical model was used to simulate the observed motions of the vehicle using a computer. Reasonable agreement was found although more damping was observed than was simulated using the model.
  • The objective of this program was to design and construct a magnetically levitated test vehicle whose motion was unrestricted in all degrees of freedom except in the direction of motion, and to make elementary measurements of the motion of the vehicle after traversing vertical and lateral offsets in the guideway. The vehicle constructed fulfilled these requirements and consisted of a platform levitated by four superconducting magnets contained in liquid helium dewars. Position and acceleration sensors and a telemetry package were on board. The vehicle was towed by a winch at speeds up to 12 m/s (approximately 27 mph). Tests weremore » performed on a 400-ft long aluminum guideway. These tests consisted of measuring the vertical and lateral accelerations and vertical position of the center of mass of the vehicle before, during, and after traversing offsets in the guideway.« less
  • This report summarizes the studies of a program to establish the technology of magnetic suspension for ultimate use in a passenger-carrying high-speed ground transportation (HSGT) system - at speeds on the order of 134 m/s (300 mph). Magnetic Levitation (MAGLEV) is one of the advanced vehicle suspension concepts considered as alternatives to conventional transportation modes in the short-haul regime. This third volume contains the computer programs for the solution of the equations of motion for 5 degrees-of-freedom, and a summary of the analytical background. These programs provide the capability for performing stability analyses of magnetically levitated vehicles, and for evaluatingmore » vehicle response and ride quality characteristics for operation over guideways with irregularities. Each program is listed along with a sample run. The programs are written in BASIC language for use on time-sharing systems. (GRA)« less
  • This report summarizes the studies of a program to establish the technology of magnetic suspension for ultimate use in a passenger-carrying high-speed ground transportation (HSGT) system - at speeds on the order of 134 m/s (300 mph). Magnetic Levitation (MAGLEV) is one of the advanced vehicle suspension concepts considered as alternatives to conventional transportation modes in the short-haul regime. This volume presents some details of the mathematical analysis associated with the MAGLEV vehicle dynamics and control (i.e., ride quality) in Appendices A through D; the noise or acoustic characteristics associated with the baseline Hamilton Standard Q-fan air propulsion system (Appendixmore » E); and the Raytheon final report for the linear synchronous motor (LSM) studies (Appendix F). (GRA)« less