Applications of the impedance method on multiple piezoelectric actuators driven structures

An impedance-based system modeling technique has been developed to determin e the output forces of multiple piezoelectric (PZT) patch actuators on an a ctive structure to produce a known vibration response. In the analysis of t he dynamic response of a structure driven by multiple PZT patches, the prop osed model includes not only the dynamic interactions between the PZT patch and the host structure bur also the impedance couplings among PZT patches. Therefore this approach can apply to a structure with multiple PZT actuato rs. Furthermore, the bending stiffness and the thickness of a PZT patch tha t are proved to be important as increases of excitation frequency are inclu ded in the proposed impedance model. Examples are given to demonstrate how to synthesize a known vibration response and how to suppress vibration resp onse at an arbitrary location on structures using this technique.