US Patent 9452656 Damper control apparatus

A damper control apparatus damps vibration of an unsprung member by controlling a damping force of a damper in a vehicle, the damper being interposed between a sprung member and the unsprung member. The damper control apparatus includes a vibration level detecting unit that detects a vibration level serving as a magnitude of the vibration of the unsprung member, and a stroke speed detecting unit that detects a stroke speed of the damper. The damper control apparatus further includes a command value calculating unit that determines a control command value, the control command value is a command value for controlling the damping force of the damper on the basis of the vibration level of the unsprung member and the stroke speed of the damper.