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Vehicle control system for controlling side slip angle and yaw rate gain

  • US 4,767,588 A
  • Filed: 04/11/1986
  • Issued: 08/30/1988
  • Est. Priority Date: 04/13/1985
  • Status: Expired due to Fees
First Claim
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1. A steering control system for a controlled vehicle, comprising:

  • means for sensing a steering wheel angle of said controlled vehicle,means for sensing a vehicle speed of the controlled vehicle,means for determining a desired value of a steady state steering response gain corresponding to a sensed value of the vehicle speed in accordance with a desired steering characteristic,means for determining a target value of an overall steering ratio between the steering wheel angle and a front wheel steer angle corresponding to the desired value of the steady state steering response gain, a predetermined desired value of a steady state side slip angle and the sensed value of the vehicle speed in accordance with a first relation determined by values of parameters characterizing the controlled vehicle,means for determining a target value of a rear wheel steer angle corresponding to the sensed value of the vehicle speed and a sensed value of the steering wheel angle in accordance with a second relation determined by the values of the parameters characterizing said controlled vehicle and said target value of the overall steering ratio,steering ratio varying means for varying an actual overall steering ratio of the controlled vehicle so that the actual overall steering ratio remains equal to the target value of the overall steering ratio, andrear wheel steering means for varying an actual rear wheel steering angle of the controlled vehicle so that the actual rear wheel steer angle remains equal to the target value of the rear wheel steer angle.

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