The design of a piezostack-based active mount and application to a vibration controlsystem

Abstract

In this work, a new active mount featuring piezostack actuators and a rubber element isproposed and applied to a vibration control system. After describing the configuration andoperating principle of the proposed mount, an appropriate rubber element andappropriate piezostacks are designed and manufactured. Subsequently, the dynamiccharacteristics of the piezostacks and the rubber element are experimentally identified. Avibration control system with a supported mass of 50 kg is then constructed, and itsgoverning equations of motion are derived. In order to actively attenuate thevibration transmitted from the base excitation, a robust sliding mode controller isformulated with consideration of parameter uncertainties. The controller is thenexperimentally realized and vibration control performances (acceleration and transmittedforce) of the proposed mount are evaluated in both time and frequency domains.