A Review on Vibration Suppression of Flexible Structures Using Piezoelectric Actuators

Abstract

Piezoelectric Actuators are devices that convert electrical energy into a mechanical displacement or stress by a phenomenon known as Piezoelectric Effect. These crystals generate energy when mechanical stress is applied. This paper reviews the application of piezoelectric actuators in vibration suppression of flexible lightweight structures. Feedback control strategies are used for suppressing periodic and aperiodic vibrations. Negative velocity feedback and positive position feedback are two such common strategies employed for controller design. A finite element is defined for modelling of a uniform cantilever beam and a thin, flexible plate. The appropriate controller frequency is obtained by modal analysis, for monomodal vibration control.