Optimal piezo-electro-mechanical coupling to control plate vibrations

TL;DR

This paper introduces an optimal piezo-electro-mechanical coupling method for controlling plate vibrations by designing electric networks that are analogs of mechanical structures, enhancing energy exchange and dissipation.

Contribution

It proposes a novel approach to maximize energy transfer between mechanical and electrical systems by designing electric networks that mirror the mechanical structure.

Findings

Optimal coupling achieved through electric network design.

Enhanced energy exchange independent of modal evolution.

Efficient mechanical energy dissipation via electric network elements.

Abstract

A new way of coupling electrical and mechanical waves, using piezoelectric effect, is presented here. Since the energy exchange between two systems supporting wave propagation is maximum when their evolution is governed by similar equations, hence, an optimal electromechanical coupling is obtained by designing an electric network which is "analog" to the mechanical structure to be controlled. In this paper, we exploit this idea to enhance the coupling, between a Kirchhoff-Love plate and one possible synthesis of its circuital analog, as obtained by means of a set of piezoelectric actuators uniformly distributed upon the plate. It is shown how this approach allows for an optimal energy exchange between the mechanic and the electric forms independent of the modal evolution of the structure. Moreover, we show how an efficient electric dissipation of the mechanical energy can be obtained adding dissipative elements in the electric network.