Multi-mode vibration reduction of a CD-ROM drive base using a piezoelectric shunt circuit

Abstract

This paper presents a new design methodology for the piezoelectric shunt damping system and applies to the multimode vibration suppression of a CD-ROM drive base. Admittance is introduced to predict the performance of the piezoelectric shunt damping. Numerical admittance obtained by commercial finite element code, ANSYS, is compared with experimentally measured one and the effectiveness of the model is verified. Multimode piezoelectric shunt damping is experimentally realized based on the target mode and frequencies obtained by the admittance analysis. The vibration of the CD-ROM drive base is effectively reduced by activating the piezoelectric shunt circuits. The experimental results presented in this work prove that admittance of the piezoelectric structure is capable of predicting the performance of piezoelectric shunt damping.