Vehicle suspension system

A vehicle suspension system, comprising:

• an electromagnetic damper provided with a sprung member and an unsprung member of a vehicle to apply a drive force and a damping force between the sprung member and the unsprung member;
• and
• a control unit for controlling the electromagnetic damper;
• the control unit comprising:
• an unsprung member demand load computing unit for computing an unsprung member demand load that attenuates a vertical vibration of the unsprung member;
• a sprung member demand load computing unit for computing a sprung member demand load that restrains a vertical displacement of the sprung member;
• and
• a target load computing unit for computing a target load for the electromagnetic damper based on the unsprung member demand load and the sprung member demand load;
• the sprung member demand load computing unit being configured to reduce an absolute value of the sprung member demand load to be forwarded to the target load computing unit when a sprung member frequency given as a frequency of a vertical vibration of the sprung member is in an unsprung member resonance frequency range where a resonance of the unsprung member can occur.