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Proceedings Paper

Vibration control via shunted embedded piezoelectric fibers
Author(s): Alberto Belloli; Dominik Niederberger; Xavier Kornmann; Paolo Ermanni; Manfred Morari; Stanislaw Pietrzko
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Paper Abstract

The scientific community has put significant efforts into the manufacturing of sensors and actuators made of piezoceramic fibers with interdigitated electrodes. These allow for increased conformability, integrability in laminate structures and offer high coupling factors. They are of particular interest for damping applications. This paper presents a comparison between piezoceramic monolithic actuators and Active Fiber Composites (AFCs) for shunt damping. For this purpose, the different actuators were bonded on aluminum cantilever plates, respectively embedded in a glass fiber composite cantilever plate. The vibration suppression was attained by converting the electric charge by means of the converse piezoelectric effect and dissipated through robust resonant shunt circuits. A new circuit topology was used, which enables efficient damping even with low piezoelectric capacitance. An integrated FE model was implemented for prediction of the natural frequencies, the optimum values for the electric components and the resulting damping performance. Patches working in the direct 3-3 mode show much better specific damping performance than the 3-1 actuated patch. The comparison between monolithic and AFC actuators shows that AFCs fulfill integrability and performance requirements for the planned damping applications.

Paper Details

Date Published: 29 July 2004
PDF: 10 pages
Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); doi: 10.1117/12.539823
Show Author Affiliations
Alberto Belloli, Swiss Federal Institute of Technology, Zurich (Switzerland)
Dominik Niederberger, Swiss Federal Institute of Technology, Zurich (Switzerland)
Xavier Kornmann, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Paolo Ermanni, Swiss Federal Institute of Technology, Zurich (Switzerland)
Manfred Morari, Swiss Federal Institute of Technology, Zurich (Switzerland)
Stanislaw Pietrzko, Swiss Federal Labs. for Materials Testing and Research (Switzerland)


Published in SPIE Proceedings Vol. 5386:
Smart Structures and Materials 2004: Damping and Isolation
Kon-Well Wang, Editor(s)

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