A LQG control strategy for a new type of active suspensions in road surface status inspection vehicles

To compensate image excursions casued by vibration displacements of vehicle bodies,the method of designing a new type of active suspension systems was proposed. A LQG control law for this new type of active suspensions was derived with theory of minimum principle. By utilizing numerical results generated by Matlab for compensation effects for image excursions achieved by a passive suspension,a LQG controller used in traditional active suspensions and a LQG controller used in this new type of active suspensions were analysed. The results showed that the LQG controller used in this new type of active suspensions performed best in compensating image excursions and achieved higher imaging-stability precision than the electronic image stabilization method.