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Piezoelectric resonant shunt enhancement by negative capacitances: Optimisation, performance and resonance cancellation

Article dans une revue avec comité de lecture
Author
BERARDENGO, Marta
304135 University of Parma = Università degli studi di Parma [Parme, Italie]
MANZONI, Stefano
125443 Politecnico di Milano [Milan] [POLIMI]
THOMAS, Olivier
543315 Laboratoire d’Ingénierie des Systèmes Physiques et Numériques [LISPEN]
VANALI, Marcello
304135 University of Parma = Università degli studi di Parma [Parme, Italie]

URI
http://hdl.handle.net/10985/15356
DOI
10.1177/1045389x18770874
Date
2018
Journal
Journal of Intelligent Material Systems and Structures

Abstract

This article addresses piezoelectric shunt damping through a resonant shunt associated with negative capacitances. The main objective of this article is to provide guidelines for choosing the best electrical circuit layout in terms of control performance and possible stability issues. This article proposes general analytical formulations for the tuning/optimisation of the electrical shunt impedance and for the prediction of the attenuation performance. These formulations are demonstrated to be valid for all the possible configurations of the negative capacitances. It is demonstrated that the behaviour of the different shunt circuits can indeed be described by a common mathematical treatment. Moreover, the use of two negative capacitances together is shown to provide benefits compared to traditional layouts based on a single negative capacitance. The mentioned advantages relate to both stability and attenuation performance. The use of a resonant shunt with the addition of negative capacitances is finally proven to provide enough attenuation to even cancel eigenfrequency peaks in some cases. This article also analyses the main issues arising from the practical implementation of the negative capacitances. Finally, the theoretical results are validated through experiments conducted on a cantilever beam coupled to two piezoelectric patches.

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