Technical Reports

Advanced Group Rapid Transit Vehicle Control Unit Design Summary

  • 01
  • May
  • 1985
AUTHOR: W. R. Greve, D. E. Haberman, R. P. Lang
SUBJECT: Passenger Rail
KEYWORDS: Automated Guideway Transit System, Failsafe, Microprocessors, Safety, Vehicle Longitudinal Control
ABSTRACT: The purpose pf the Advanced Group Rapid Transit (AGRT) program was to develop an advanced automated guideway transit system capable of providing high passenger volumes, short waiting times, and high levels of passenger service. The system is the development of a transportation system consisting of small, automated vehicles operating on a single lane guideway at short headways with unmanned, off-line stations. This report documents the design, development and test activity associated with the Vehicle Control Unit (VCU) for the AGRT program. The VCU is that part of the AGRT control hierarchy carried onboard a transit vehicle that is responsible for overall vehicle control and safety. The vehicle control function involves implementation of wayside commands conveyed to the vehicle by inductive communications and magnetic vehicle status measurements. The VCU controls longitudinal motion (jerk, acceleration, speed, and position); switching; closed-loop emergency stopping; and vehicle doors. Safety assurance tasks include overspeed protection, emergency removal of tractive effort, door control, status monitoring, fault protection, and system initialization. The VCU is described in detail, including conclusions as well as recommendations.
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