SYSTEM AND METHOD FOR REDUCING STEERING WHEEL VIBRATION IN ELECTRONIC POWER STEERING SYSTEMS

摘要

Methods and apparatus are provided for reducing steering wheel vibrations in electronic power steering systems. The apparatus includes a processor and performs a method that estimates an average angular wheel speed of at least one wheel of the vehicle; determines an average wheel angle from the average angular wheel speed; generates sine and cosine functions of the average angular wheel angle; processes the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; reconstructs the sine and cosine functions using the steering wheel torque signal; combines the sine and cosine functions to provide a control signal, and controls the EPS system via the control signal to attenuate smooth road shake vibrations in a steering wheel of the vehicle.

主权项

1. In a vehicle having an Electric Power Steering (EPS) system, a method, comprising:
(a) estimating an average angular wheel speed of at least one wheel of the vehicle; (b) determining an average wheel angle from the average angular wheel speed; (c) generating sine and cosine functions of the average angular wheel angle; (d) processing the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; (e) reconstructing the sine and cosine functions using the steering wheel torque signal; combining the sine and cosine functions to provide a control signal; and (f) controlling the EPS system via the control signal; wherein smooth road shake vibrations in a steering wheel of the vehicle are attenuated.