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Method for detecting an erroneous direction of travel signal

  • US 6,198,988 B1
  • Filed: 08/10/1998
  • Issued: 03/06/2001
  • Est. Priority Date: 08/10/1998
  • Status: Expired due to Term
First Claim
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1. A method of detecting an erroneous travel direction signal for use in a yaw control system for a motor vehicle, said method comprising the steps of:

  • establishing a first yaw rate estimate;

    establishing a second yaw rate estimate;

    calculating a first difference between said first and second yaw rate estimates;

    halting further erroneous travel direction analysis until said first difference is less than a threshold;

    obtaining a measured yaw rate signal using a yaw rate sensor;

    calculating a second difference between said measured yaw rate signal and one of said first and second yaw rate estimates; and

    setting a travel direction signal fault false if said second difference is not greater than said threshold and setting said travel direction signal fault true if said second difference is greater than said threshold.

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