Patent ID: 9205863
Filing Date: 2015-12-08
Classification: B62D

Abstract:
1. A control apparatus of a motor-driven power steering (MDPS), the control apparatus comprising: a torque sensor configured to measure steering torque applied to the steering wheel and to output a steering torque signal indicative of the steering torque; a steering angle sensor configured to measure a steering angle of the steering wheel and to output a steering angle signal indicative of the steering angle, wherein a steering angle speed is defined as a rate of the steering angle changes over time; a variable notch filter configured to receive and process the steering torque signal and to output a processed steering torque signal, wherein the variable notch filter is configured to reduce a torque ripple in the steering torque signal when the steering angle speed is equal to or higher than a predetermined reference value; a vehicle speed sensor configured to measure a vehicle speed and to output a vehicle speed signal indicative of the vehicle speed; and a controller configured to control the steering motor based on the steering angle signal, the processed steering torque signal, and the vehicle speed signal from the steering angle sensor, the variable notch filter, and the vehicle sensor, respectively.