Patent attributes
Disclosed herein are an apparatus and method of controlling a motor-driven power steering system. The apparatus may include: a sensor configured to detect at least one of a steering angle, an angular speed, and a column torque in the motor-driven power steering system; and a controller configured to determine whether a reverse steering operation has been performed based on the steering angle or the angular speed, and configured to output, when non-reverse steering, a high-frequency compensation gain (a second gain) based on the column torque, as a final compensation gain, and output, when reverse steering, a value obtained by applying an additional compensation gain (a first gain) optimized corresponding to an angular acceleration to the high-frequency compensation gain (the second gain), as the final compensation gain.
