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Improved shunt damping with two negative capacitances: an efficient alternative to resonant shunt

Article dans une revue avec comité de lecture
Author
BERARDENGO, Marta
125443 Politecnico di Milano [Milan] [POLIMI]
ccTHOMAS, Olivier
MANZONI, Stefano
125443 Politecnico di Milano [Milan] [POLIMI]
ccGIRAUD-AUDINE, Christophe
13338 Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 [L2EP]
13338 Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 [L2EP]

URI
http://hdl.handle.net/10985/11321
DOI
10.1177/1045389X16667556
Date
2016
Journal
Journal of Intelligent Material Systems and Structures

Abstract

This paper deals with piezoelectric shunt damping enhanced with negative capacitances. A novel electrical circuit layout is addressed, based on the use of two negative capacitances. It is shown that the shunt performances, in terms of vibration reduction and stability margins, are increased as compared with the classical single negative capacitance layouts. Then, the article focuses on the comparison of a simple resistive shunt, enhanced by a pair of negative capacitances, with a classical resonant shunt. It is shown that the newly proposed enhanced resistive shunt can show equivalent performances in terms of vibration attenuation than the resonant shunt, with at the same time an increased robustness to frequency detuning, in the case of mono-modal damping. The broadband control capability of the resistive shunt coupled to the new negative capacitance layout is also evidenced. The main part of the work is analytical, and then the model is validated by an extensive experimental campaign at the end of the paper.

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