Analysis for active isolation of the equipment on flexible beam structure

Abstract

This paper dealt with the active isolation of vibration. Many home appliance and vehicles in operation generate the vibration for several reasons. Due to the vibration propagated to the structure, it has a negative influence of the structure such as breakage and decreased reliability. As basic study on vibration isolation, the analytical model is as follows. The analytical model consists of the equipment as source of vibration and the flexible beam to be controlled. The equipment is assumed by rigid body and excited by a concentrated force as disturbance. And the equipment and the beam are connected to spring located at both ends the equipment. The actuators are located slightly away from spring. To minimize the vibration propagated to the beam structure through the equipment, the controller was designed by using the multi-channel Wiener filter after calculating the transfer path through the theoretical formula. The disturbance was given as harmonic components. The propagated vibration to the beam caused by the disturbance was controlled using a designed controller. Finally, the numerical results for the displacement obtained at each point of the beam structure with and without control were carried out and compared.