Control of thermally induced vibration in a composite beam with damping effect

This article deals with control of thermally induced vibration in a composite beam with damping effect. The beam consists of a central thermoelastic structural layer and two outer piezothermoelastic layers. The thermoelastic vibration in the beam is suppressed by the superposition of electroelastic vibration. The electroelastic vibration is repeatedly excited through application of electric potential differences across the piezoelectric layers. The initiation and termination times of the applied electric pulses are determined by a method similar to the optimization procedure developed previously by the authors. The amplitudes of the applied electric pulses are determined using a control method based on speed feedback. Numerical results for an aluminum/PZT ceramic beam are illustrated graphically.