Propose of active suspension under reference-input modification using vibration manipulation function

Abstract

This study proposes an active suspension that suppresses vehicle rolling oscillation under preview closed-loop finite-time settling control using rotational vibration manipulation function (rVMF) as a reference input. The active suspension operation is performed efficiently by using preview data on the road surface profile beforehand. A 1/2 car model was used in simulations. As a comparison, a 1/2 car model that is ideally controlled under sky-hook theory was considered. At each operational instant, the rolling oscillation of the car body was suppressed by driving two actuators under the base of the active suspension along rVMF. Under two different road surface profile in left and right, the rolling oscillation was well suppressed. On the other hand, sky-hook took more time to cease the vibration. However, since proposed method focused on the suppression for rolling oscillation, it cannot suppress vertical vibration of the car.