Vehicle following is a technique for the longitudinal control of vehicles in an automated transit system where the speed and spacing of a given vehicle are governed by the behavior of its predecessor on the guideway. Vehicle-follower control at very short headways (0.4 to 3 s) may be achieved by introducing a variable-gain capability. The approach can entail two modes of operation: velocity-command (open-loop) control and regulation (closed-loop) control. Conventional vehicle-follower design is successfully applied in the regulation mode at short headways. However, significant problems can arise when transitions are attempted from velocity-command to regulation mode because of jerk and acceleration constraints for ride-quality considerations. The report investigates the use of variable-gain techniques to resolve the transition problem.


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    Title :

    Vehicle-Follower Controls for Short Headway AGT Systems - Functional Analysis and Conceptual Designs


    Contributors:
    H. Y. Chiu (author) / G. B. Stupp (author) / S. J. Brown (author)

    Publication date :

    1976


    Size :

    109 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English