APPARATUS AND METHOD FOR CONTROLLING ELECTRIC POWER STEERING SYSTEM

摘要

According to an embodiment of the present invention, an apparatus for controlling an electric power steering system includes a failure detection unit detecting whether a torque sensor has failed; a first calculation unit calculating an absolute steering angle based on information detected by a motor position sensor; and a second calculation unit calculating an estimated lateral acceleration of a vehicle based on the absolute steering angle calculated by the first calculation unit and velocity of the vehicle received from a velocity sensor, wherein, if a failure of a torque sensor is detected by the failure detection unit, an assist current value is applied to the motor based on the estimated lateral acceleration of the vehicle.

主权项

1. An apparatus for controlling an electric power steering system, the apparatus comprising:
a failure detection unit detecting whether a torque sensor has failed; a first calculation unit calculating an absolute steering angle based on information detected by a motor position sensor; and a second calculation unit calculating an estimated lateral acceleration of a vehicle based on the absolute steering angle calculated by the first calculation unit and velocity of the vehicle received from a velocity sensor, wherein, if a failure of the torque sensor is detected by the failure detection unit, an assist current value is applied to the motor based on the estimated lateral acceleration of the vehicle, and wherein the assist current value is calculated to be proportionate to the estimated lateral acceleration calculated in the second calculation unit.