STEER RECOVERING METHOD FOR MOTOR DRIVEN POWER STEERING

摘要

PURPOSE: A method for restoring the position of a steering wheel of an electric powered steering system is provided to restore a steering wheel to an original state by using a torque sensor which corrects the restoring angle to 5 degrees without a steering angle sensor. CONSTITUTION: Steering torque is measured by a torque sensor and is based on the manipulation of a steering wheel(S10). Using the measured speed of a vehicle, a gain value is given to each speed value(S22a). A control factor value for a steering wheel restoring operation is produced using a total torque requiring value calculated by multiplying a gear ratio with motor torque when measuring steering torque. A necessary torque restoring value is calculated by steering torque denotation, steering wheel state, steering opposition power, and rubbing compensatory torque. A motor is controlled with the necessary restoring torque value.