Force control in electrohydraulic active suspensions revisited

The inner loop control for the actuator force can be quite simply compensat ed by means of a correction term to the desired force signal at the input. The correction requires only a measurement of the actuator piston velocity and is employed to cancel the loop disturbance caused by the oil flow to th e actuator. Although an additional time constant is introduced by the integ ration in the inner loop force control, the overall performance is neverthe less quite close to that of an ideal optimal system.