The longitudinal control system is considered in two functional areas: vehicle management and vehicle control. Synchronous and asynchronous vehicle management systems are evaluated, and the advantages and disadvantages associated with each technique are compared with their impact on management computer requirements, trip time, and system use. A synchronous slot concept was chosen as a logical first step in the development process because of its relative ease of implementation. Advantages associated with the adaptability of asynchronous vehicle management are outweighed by the complexity of asynchronous merge requirements. The vehicle longitudinal control system being developed is a point follower. A dual-mode vehicle was modeled and incorporated into a digital simulation containing a number of candidate guidance schemes controlling both throttle and brake actuators. With the aid of simulation results, guidance options are evaluated on the basis of on-board versus off-board equipment requirements, spacing and type of guideway benchmarks, and accuracy and response in the presence of abnormal operating conditions. Several options appear attractive.

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    • This paper appears in Dual Mode Transportation, which is a publication containing the proceedings of a conference conducted by the Transportation Research Board, May 29-31, 1974. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Transportation Research Board (TRB)

    Washington, DC   
  • Authors:
    • Farmer, Ray
    • Rumreich, Frank
    • Smisek, Ronald
  • Conference:
  • Publication Date: 1976

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  • Accession Number: 00149269
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 30 1977 12:00AM