Modelling and Modal Control of a Quarter Vehicle Suspension System

Abstract

In this paper is presented the mathematical model of a quarter vehicle suspension system, it includes disturbances caused by the terrain irregularities. The work shows a model for a passive suspension and the model of a semiactive suspension system, which includes the damping force of a magnetorheological damper connected to the vehicle chassis. The MR damper has the function to attenuate the vertical movement, by means of the application of an algorithm of control. To minimize the chassis movement, is considered a modal control scheme based on the Positive Velocity Feedback (PVF). Fi nally some numerical results are included to show the dynamic per fomance of the passive suspension system and the response of the semiactive suspension system based on a Magnetorheological damper.