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A New Electrical Circuit With Negative Capacitances to Enhance Resistive Shunt Damping

[+] Author Affiliations
Marta Berardengo, Stefano Manzoni

Politecnico di Milano, Milano, Italy

Olivier Thomas, Christophe Giraud-Audine

Arts et Métiers ParisTech, Lille, France

Paper No. SMASIS2015-8836, pp. V001T03A006; 9 pages
  • ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Development and Characterization of Multifunctional Materials; Mechanics and Behavior of Active Materials; Modeling, Simulation and Control of Adaptive Systems
  • Colorado Springs, Colorado, USA, September 21–23, 2015
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-5729-8
  • Copyright © 2015 by ASME


This article proposes a new layout of electrical network based on two negative capacitance circuits, aimed at increasing the performances of a traditional resistive piezoelectric shunt for structural vibration reduction. It is equivalent to artificially increase the modal electromechanical coupling factor of the electromechanical structure by both decreasing the short-circuit natural frequencies and increasing the open-circuit ones. This leads to higher values of the modal electromechanical coupling factor with respect to simple negative capacitance configurations, when the same margin from stability is considered. This technique is shown to be powerful in enhancing the control performance when associated to a simple resistive shunt, usually avoided because of its poor performances.

Copyright © 2015 by ASME
Topics: Damping , Circuits



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