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Proceedings Paper

Adaptive piezoelectric shunt damping
Author(s): Andrew J. Fleming; S. O. Reza Moheimani
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Paper Abstract

Piezoelectric shunt damping systems reduce structural vibration by shunting an attached piezoelectric transducer with an electrical impedance. Current impedance designs result in a coupled electrical resonance at the target modal frequencies. In practical situations, variation in structural load or environmental conditions can result in significant changes in the structural resonance frequencies. This variation can severely reduce shunt damping performance as the electrical impedance remains tuned to the nominal resonance frequencies. This paper introduces a method for online adaption of the shunting impedance. A reconstructed estimate of the RMS\ strain is minimized by varying the component values of a synthetic shunt damping circuit. The presented techniques are applied in real time, to tune the component values of a randomly excited beam.

Paper Details

Date Published: 10 July 2002
PDF: 12 pages
Proc. SPIE 4693, Smart Structures and Materials 2002: Modeling, Signal Processing, and Control, (10 July 2002); doi: 10.1117/12.475253
Show Author Affiliations
Andrew J. Fleming, Univ. of Newcastle (Australia)
S. O. Reza Moheimani, Univ. of Newcastle (Australia)

Published in SPIE Proceedings Vol. 4693:
Smart Structures and Materials 2002: Modeling, Signal Processing, and Control
Vittal S. Rao, Editor(s)

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