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专利名称：Method and apparatus for controlling an
electric assist steering system using anadaptive blending torque filter
发明人：Kevin M. McLaughlin申请号：US08/246947申请日：19940520公开号：US05504403A公开日：19960402
摘要：A steering assist system (10) providing assist in response to a steering controlsignal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing aspeed 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 signalindicative of applied steering torque. A blending filter (70, 71) is connected to the torquesensor and provides a blended filtered torque signal having a non-linear characteristic attorque frequencies less than a blending frequency and a linear characteristic at torquefrequencies greater than the blending frequency. The blending filter establishing theblending frequency at a value functionally related to vehicle speed. Steering assist motor(28) provides steering assist in response to a control signal. The control signal is providedin response to the blended filtered torque signal. The blending filters filtering thetorque signal so as to maintain a selectable system bandwidth during system operation.
申请人：TRW INC.
代理机构：Tarolli, Sundheim & Covell
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