Patent ID: 8700261
Filing Date: 2014-04-15
Classification: B60G,F16F

Abstract:
1. An active damping device for suppressing vibrations of an object to be damped depending on an excitation frequency component of an excitation source, the active damping device comprising: an auxiliary mass; an actuator that drives the auxiliary mass to generate a spring force and a damping force while the auxiliary mass is driven, and the active damping device using a reaction force generated when the auxiliary mass is driven by the actuator, and a stiffness and damping controller, wherein the stiffness and damping controller feeds back a stiffness and damping control signal composed of a detected or estimated displacement of the actuator multiplied by a stiffness gain and a detected or estimated operating speed of the actuator multiplied by a damping gain to change stiffness and damping characteristics of the active damping device in response to variation in the excitation frequency, and wherein the stiffness and damping controller adjusts the stiffness gain and the damping gain in synchronization with the excitation frequency based on excitation frequency information indicative of the excitation frequency that varies depending on a driving condition of the excitation source so that a natural frequency of the active damping device can be matched with the excitation frequency of the object to be damped and damping of the active damping device can be cancelled out.