A control unit for an electric power steering apparatus that controls a motor based on a current command value (2) calculated based on a current command value (1) due to steering torque generated on a steering shaft and a current detection value of the motor providing a steering mechanism with a steering assist force. The apparatus includes an SAT estimating section that inputs a motor angular velocity, a motor angular acceleration, the current command value (1) and the steering torque, and estimates a self-aligning torque (SAT) or measures by a sensor; and a feedback section that processes the estimated SAT value and outputs an SAT compensation value. The feedback section comprises a BPF, a dead band section, a steering torque sensitive gain section and a vehicle velocity sensitive gain section. The current command value (2) is obtained by adding the SAT compensation value to the current command value (1).


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    Title :

    Control unit for electric power steering apparatus


    Contributors:

    Publication date :

    2017-05-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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