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Shock and Vibration
Volume 2016, Article ID 9739217, 18 pages
Research Article

The Behaviour of Mistuned Piezoelectric Shunt Systems and Its Estimation

1Department of Industrial Engineering, Università degli Studi di Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
2Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 34, 20156 Milan, Italy

Received 20 May 2016; Revised 18 July 2016; Accepted 26 July 2016

Academic Editor: Nicola Caterino

Copyright © 2016 M. Berardengo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper addresses monoharmonic vibration attenuation using piezoelectric transducers shunted with electric impedances consisting of a resistance and an inductance in series. This type of vibration attenuation has several advantages but suffers from problems related to possible mistuning. In fact, when either the mechanical system to be controlled or the shunt electric impedance undergoes a change in their dynamical features, the attenuation performance decreases significantly. This paper describes the influence of biases in the electric impedance parameters on the attenuation provided by the shunt and proposes an approximated model for a rapid prediction of the vibration damping performance in mistuned situations. The analytical and numerical results achieved within the paper are validated using experimental tests on two different test structures.