Trw Limited

Hristos K Mantjios

Kevin M McLaughlin

Stuart Walter Parker

A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A controller is connected to the vehicle speed sensor (56) and to the torque sensor (44). The controller includes an adaptive torque filter (80) that maintains a selectable system bandwidth independent of gain changes and vehicle speed changes. The adaptive filter (80) recovers any gain reduction by increasing the frequency of a filter pole.

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Troy, MI, United States of America

Hristos K Mantjios