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Roll stability indicator for vehicle rollover control

  • US 7,788,007 B2
  • Filed: 01/12/2006
  • Issued: 08/31/2010
  • Est. Priority Date: 01/12/2006
  • Status: Expired due to Fees
First Claim
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1. A method for generating a roll stability indicator for indicating a likelihood that a vehicle will tip-up or rollover, said method comprising:

  • providing a roll rate signal of the roll rate of the vehicle;

    providing a yaw rate signal of the yaw rate of the vehicle;

    providing a lateral acceleration signal of the lateral acceleration of the vehicle;

    providing a speed signal of the speed of the vehicle;

    providing a hand-wheel angle signal of the angle of the hand-wheel of the vehicle;

    estimating a roll angle signal of the vehicle based on one or more of the roll rate signal, the yaw rate signal, the lateral acceleration signal, the speed signal and the hand-wheel angle signal;

    estimating a bank angle signal of the vehicle from one or more of the roll rate signal, the yaw rate signal, the lateral acceleration signal, the vehicle speed signal and the hand-wheel angle signal;

    correcting the roll angle signal based on the estimated bank angle signal to provide a corrected roll angle signal;

    calculating a roll energy signal based on the corrected roll angle signal;

    calculating a roll energy rate signal based on the roll energy signal;

    determining a critical energy signal and a critical energy rate signal; and

    calculating the roll stability indicator based on the roll energy signal, the roll energy rate signal, the critical energy signal and the critical energy rate signal.

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