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Driver intent estimation without using torque sensor signal

  • US 10,155,534 B2
  • Filed: 06/14/2016
  • Issued: 12/18/2018
  • Est. Priority Date: 06/14/2016
  • Status: Active Grant
First Claim
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1. A power steering system for providing a motor torque assist command, the power steering system comprising:

  • a rack torque estimator module that determines an estimated rack torque value based on a motor angle, and a motor velocity;

    a driver intent detection module that computes a disturbance torque scaling factor based on the estimated rack torque value by computing a disturbance torque signal based on the estimated rack torque value; and

    a blend module that generates the motor torque assist command based on a scaled value of the estimated rack torque value using the disturbance torque scaling factor, the scaling comprising multiplying the estimated rack torque value by the disturbance torque scaling factor.

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