SUSPENSION CONTROL DEVICE AND FOUR WHEEL STEERING DEVICE

摘要

PURPOSE:To prevent control of a suspension and a four wheel steering device from becoming unstable by the drift of an angular acceleration sensor. CONSTITUTION:A car speed sensor 1 detects the speed of a car, while a yaw angular acceleration sensor 2 detects angular acceleration around a yaw-axis of a vehicle. A zero point calculating means 6 calculates the amount of drift and zero point from an output signal of the yaw-angular acceleration sensor 2, and based on the calculation results, an angular acceleration correcting means 7 corrects an output signal of the yaw angular acceleration sensor 2. A turning state estimating means 8 estimates the degree of rolling generated during turning by the output from the car speed sensor 1 and the corrected value of the yaw angular acceleration, and outputs a control signal so as to restrict the rolling. A drive circuit 9 drives an actuator 4 by the control signal from the turning state estimating means 8 to control damping force of a shock absorber 3.