Patent ID: 6983818
Filing Date: 2006-01-10
Classification: B62D

Abstract:
1. A steering control apparatus comprising: a steering wheel angle detector for detecting a rotation angle of a steering wheel mounted in a vehicle and outputting a steering wheel angle signal; a road surface reaction force torque detector for detecting a road surface reaction force torque from a front wheel of the vehicle and outputting a road surface reaction force torque signal; an arithmetic part for calculating a steering reaction force torque by using a specified constant, based on the road surface reaction force torque; a first motor fixed to the steering wheel for generating the steering reaction force torque applied to the steering wheel; a first control part for controlling the first motor based on the steering reaction force torque; a correction arithmetic part, including a differential circuit to which the road surface reaction torque signal is input and which has a differential time constant, for calculating a correction signal using a signal output by the differential circuit; a lead differential correction arithmetic part for inputting the steering wheel angle signal to a first order lead filter having the same time constant as the differential time constant, and adding the correction signal to an output signal of the first order lead filter to calculate a steering angle signal of the front wheel; a second motor fixed to the front wheel for controlling the front wheel angle; and a second control part for controlling the second motor based on the steering angle signal.