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Active wheel steering control

  • US 20050234621A1
  • Filed: 04/20/2004
  • Published: 10/20/2005
  • Est. Priority Date: 04/20/2004
  • Status: Active Grant
First Claim
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1. A control system for providing active rear-wheel steering for a vehicle, said system comprising:

  • an open-loop controller for generating an open-loop steering control signal;

    a yaw rate feedback controller for generating a yaw rate feedback signal, said yaw rate feedback controller including a yaw rate proportional control process block that generates a rear-wheel steering proportional control signal for determining the yaw rate feedback signal, wherein the yaw rate proportional control process block determines the rear-wheel steering proportional control signal based on at least one wheel longitudinal slip input signal from one or more of wheel speed, automatic braking system on or off, and traction control system on or off;

    a side-slip rate feedback controller for generating a side-slip rate feedback signal, said side-slip rate feedback controller including a side-slip rate proportional control process block that generates a side-slip rate control component signal for determining the side-slip rate feedback signal, wherein the side-slip rate proportional control process block determines the side-slip rate control component signal based on at least one wheel longitudinal slip input signal from one or more of wheel speed, automatic braking system on or off, and traction control system on or off; and

    a combiner for combining the open-loop steering control signal, the yaw rate feedback signal and the side-slip rate feedback signal to generate a rear-wheel steering control signal for steering the rear wheels of the vehicle.

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