Active Vibration Control of Plate Structure

Abstract

Vibration control and/or reduction can significantly improve the performance and operation of systems and machines in various industries. As technology advances, the methods of vibration control also become more involved and therefore allow for control of more complex structures. This paper focuses on vibration control of a flexible plate system. An experimental setup is designed to demonstrate reduction of flexible modes of the plate system. Actuators, accelerometers, and force sensors are specified to apply appropriate disturbance forces of varying complexity and to measure and record data necessary to update the theoretical model and design an effective controller. The experimental setup is initially made up of Aluminum plate of 3mm thickness. The control scheme involves non-collocation control of a location to which the piezo-patch is mounted. Software and experimental results of the modeling of a smart plate are presented for active vibration control. The smart plate consists of a rectangular aluminum plate modeled in cantilever configuration with surface bonded piezoelectric patches. The patches are symmetrically bonded on top and bottom surfaces. The study uses ANSYS 16.0 software to derive the finite element model of the smart plate. By using this model, the study first gives the influences of the actuator placement and size on the response of the smart plate and determines the maximum admissible piezoelectric actuation voltage.