"SAFE-APPROACH" VEHICLE-FOLLOWER CONTROL

This paper presents a vehicle-following control strategy suitable for both long- and short-headway automated guideway transit (AGT) systems. The strategy handles the vehicle overtake situation with the same basic controller as is used in steady-state string operations. A tight control loop is tied around each vehicle in the string. This control loop is isolated from large transients, such as those that occur during overtake situations, by constraining the vehicles to follow a well-behaved target trajectory, which closes on the vehicle immediately ahead, in accordance with a "safe-approach" operating policy. By this means, the controller operates on small signals at all times. The safe-approach target trajectory is determined by the states of the leading and trailing vehicles, the states of a vehicle which may become a new lead vehicle during merges, and the jerk, acceleration, and velocity constraints of the AGT system. The policy is illustrated with an example controller design and simulation evaluation.

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    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Sklar, S J
    • Bevans, J P
    • Stein, G
  • Publication Date: 1979-2

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Filing Info

  • Accession Number: 00196459
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 15 1979 12:00AM