Electric power steering compensation for vehicles
AssigneeGM Global Technology Operations LLC
InventorsKenneth L. Oblizajek, John D. Sopoci, Stephen R. Pastor
Life of this patent
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Abstract
Methods and systems are provided for controlling steering in a vehicle having an electric power steering system (EPS) with a steering wheel, the EPS configured to attenuate smooth road shake (SRS) for the vehicle. A first relationship is determined between a torque of the steering wheel and motions of the steering wheel while free of SRS excitation. A second relationship is determined between the torque and the motions with SRS excitation. A mapping is generated based on the first relationship and the second relationship via a processor for use in adjusting steering control.
Claims20
A method of controlling steering in a vehicle having an electric power steering system (EPS) having a steering wheel, the EPS configured to attenuate smooth road shake (SRS) for the vehicle, the method comprising the steps of:
- determining a first relationship between a torque of the steering wheel and motions of the steering wheel while free of SRS excitation;
- determining a second relationship between the torque and the motions with SRS excitation through road wheel excitation;
- and
- generating a mapping based on the first relationship and the second relationship via a processor for use in adjusting steering control.
A program product for controlling steering in a vehicle having an electric power steering system (EPS) having a steering wheel, the EPS configured to attenuate smooth road shake (SRS) for the vehicle, the program product comprising:
- a program configured to:
- determine a first relationship between a torque of the steering wheel and motions of the steering wheel while free of SRS excitation;
- determine a second relationship between the torque and the motions with SRS excitation through road wheel excitation;
- and
- generate a mapping based on the first relationship and the second relationship for use in adjusting steering control;
- and
- a non-transitory, computer-readable storage medium storing the program.
A system for controlling steering in a vehicle having an electric power steering system (EPS) having a steering wheel, the EPS configured to attenuate smooth road shake (SRS) for the vehicle, the system comprising:
- an actuator configured to dither the steering wheel;
- and
- a processor configured to:
- determine a first relationship between a torque of the steering wheel and the motions of the steering wheel while free of SRS excitation;
- determine a second relationship between the torque and the motions with SRS excitation through road wheel excitation;
- and
- generate a mapping based on the first relationship and the second relationship for use in adjusting steering control.
Dependencies are inferred from the claim text.