DAMPER FOR AUTOMOBILES FOR REDUCING VIBRATION OF AUTOMOBILE BODY

摘要

A damper for automobiles capable of producing good damping effect with a simple structure while ensuring high reliability. The damper is used for reducing the vibration of an automobile body and attached to the automobile body. The damper comprises an actuator for driving an auxiliary mass, a current detector for detecting the current flowing through an armature of the actuator, means for detecting the terminal voltage applied to the actuator, a computing circuit for computing the induced voltage of the actuator from the current detected by the current detector and the terminal voltage and computing at least one of the relative speed of the actuator, the relative shift thereof, and the relative acceleration thereof, and a control circuit for driving/controlling the actuator according to at least one of the relative speed, relative shift, and relative acceleration of the actuator computed by the computing circuit.