Design and experimental validation of piezoelectric shunt structures using admittance analysis

摘要

In this paper, a new shunt design method using piezoelectric materials is proposed. Admittance is introduced to represent the electro-mechanical characteristics of piezoelectric structures and to predict the performance of the piezoelectric shunt system. It is shown that the admittance of the piezoelectric structure is proportional to the dissipated energy in the shunt circuit. Admittance is used as a design index to construct the piezoelectric shunt system, and it is obtained by the finite element method. In order to demonstrate the effectiveness of the proposed design method, vibration reduction of the piezoelectric structure with the shunt circuit is realized by experiments. Damped system responses of the piezoelectric structure in the frequency and time domains verify that the admittance is proportional to the performance of the piezoelectric shunt system.