Dynamic Characterization of a Piezoelectric Actuated Cantilever Beam Using Energetic Parameters

Abstract

This article aims to examine, in experimental terms, some new research opportunities on the dynamic behavior of the mechanical systems with piezoelectric actuation, using the energetic parameters evolution (especially the electric active power or real power as well) captured from the supply circuit of the actuator. The study is carried out on an experimental setup that consists of an aluminium cantilever beam having two small thickness PZT piezoelectric plate transducers glued close-by the rigidly fixed end on each side of the beam. Using some new theoretical and experimental approaches developed for these purposes there is undertaken the computer assisted monitoring of the energetic parameters from the piezoelectric transducers supply circuit. The transducers are used as sensors and actuators as well. The research focuses on the possibility to describe some essential dynamic phenomena, such as vibration modes characterization, resonance, modal damping using negative power actively and passively generated, and the dynamics of transient regimes. Some results are similar to those already obtained on a cantilever beam actuated with a voice-coil (Lorentz force) actuator.