VEHICLE-FOLLOWER CONTROLS FOR SHORT HEADWAY AGT SYSTEMS - FUNCTIONAL ANALYSIS AND CONCEPTUAL DESIGNS

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.

  • Corporate Authors:

    Johns Hopkins University, Laurel

    Applied Physics Laboratory, 11100 Johns Hopkins Road
    Laurel, MD  USA  20723-6099

    Urban Mass Transportation Administration

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Chiu, H Y
    • Stupp, GBJ
    • Brown, SJJ
  • Publication Date: 1976-12

Media Info

  • Pagination: 109 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00155351
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: APL/JHU-CP-051/TPR035Final Rpt, UMTA-MD-06-0018-76-4
  • Contract Numbers: DOT-UT-30010
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jul 19 1977 12:00AM