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Vehicle speed control apparatus and method

  • US 4,558,415 A
  • Filed: 05/20/1983
  • Issued: 12/10/1985
  • Est. Priority Date: 05/20/1983
  • Status: Expired due to Term
First Claim
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1. In apparatus for controlling the speed of a vehicle having a propulsion motor and moving along a track providing to the vehicle an input speed command having first and second information components, the combination of:

  • means responsive to the actual speed of the vehicle along said track;

    first means responsive to the first information component to provide a first speed command;

    second means responsive to the second information component to provide a second speed command;

    means including a dynamic serial link for providing the first speed command to the second means and for providing the second speed command to the first means;

    said first means establishing a predetermined relationship between the first speed command and the second speed command to provide a first output signal to control the energization of the propulsion motor when said predetermined relationship is present between the first and second speed commands; and

    said second means establishing a predetermined relationship between the second speed command and the first speed commond to provide a second output signal to control the energization of the propulsion motor when said predetermined relationship is present between the second and first speed commands.

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