Automated mixed traffic transit vehicle microprocessor controller

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Automated mixed traffic transit vehicle microprocessor controller

Marks, R.A. / Cassell, P. / Johnston, A.R.

The long-range objective of the Automated Mixed Traffic Vehicle (AMTV) program is to develop the sensing and logic required to operate a low-speed, driverless shuttle bus or tram in mixed traffic and to demonstrate operation of such a system in a user environment. This report describes an improved AMTV speed control system employing a microprocessor and transister chopper motor current controller and its performance is presented in terms of velocity versus time curves.The on-board computer hardware and software systems are fully described as is the software development system. All of the programming used in this controller was implemented using Fortran. This new microprocessor controller has made possible a number of new safety features and has improved the comfort associated with starting and stopping. Back-up systems are used when needed. In addition, most of the vehicle's performance characteristics can be altered by simple program parameter changes. A failure analysis of the microprocessor controller has been generated and the results are included in the Appendices, as well as flow diagrams for the speed control algorithms and complete Fortran code listings.