Patent ID: 6751538
Filing Date: 2004-06-15
Classification: B62D

Abstract:
A control unit for an electric power steering apparatus that controls a motor for giving steering auxiliary force to a steering mechanism, the control unit comprising:a calculating section that calculates a steering auxiliary command value, wherein the calculation is based on steering torque generated in a steering shaft and on a complementary sensitivity function, wherein the complementary sensitivity function relative to a frequency is set to a level that approaches 1 in a band in which disturbance to be suppressed exists, and is set to a level that approaches 0 in a band in which disturbance to be transmitted exists; and a control section that calculates a current control value for controlling the motor, wherein the calculation of the current control value is based on the steering auxiliary command value, and on a current value of the motor; wherein an eigenvalue of the power steering apparatus that is set to 10 to 13 Hz, an eigenvalue of suspension that is set to 13 to 17 Hz, a flutter oscillation area that is set to 15 to 25 Hz, and a motor torque ripple area that is set to 15 to 30 Hz, are included in the band in which the disturbance to be suppressed exists.