Vehicle rollover sensing using extended kalman filter

  • US 6,002,974 A
  • Filed: 02/06/1998
  • Issued: 12/14/1999
  • Est. Priority Date: 02/06/1998
  • Status: Expired due to Term
  • ×
    • Pin
First Claim
Patent Images

1. A rollover sensing apparatus for predicting an overturn condition for a vehicle, comprising:

  • an angular roll rate sensor for sensing roll rate of a vehicle and producing an output signal indicative thereof;

    an angular pitch rate sensor for sensing pitch rate of the vehicle and producing an output signal indicative thereof;

    a longitudinal accelerometer for measuring longitudinal acceleration of the vehicle and producing an output signal indicative thereof;

    a lateral accelerometer for measuring lateral acceleration of the vehicle and producing an output signal indicative thereof;

    a vertical accelerometer for measuring vertical acceleration of the vehicle and producing an output signal indicative thereof;

    a non-linear filter for receiving said signals from said angular roll rate and pitch rate sensors, and said longitudinal, lateral, and vertical accelerometers, and for estimating a roll angle and a pitch angle as a function of said received signals;

    a predictor for predicting a future roll angle as a function of said estimated roll angle and said sensed roll rate, and for predicting a future pitch angle as a function of said estimated pitch angle and said sensed pitch rate;

    a comparator for comparing each of said predicted roll and pitch attitude angles to a threshold value; and

    an output for deploying a vehicle overturn condition output based on said comparison.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×