Adaptive piezoelectric shunt damping

Andrew J. Fleming; S. O. Reza Moheimani

doi:10.1117/12.475253

10 July 2002 Adaptive piezoelectric shunt damping

Andrew J. Fleming, S. O. Reza Moheimani

Proceedings Volume 4693, Smart Structures and Materials 2002: Modeling, Signal Processing, and Control; (2002) https://doi.org/10.1117/12.475253
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

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.

Citation Download Citation

Andrew J. Fleming and S. O. Reza Moheimani "Adaptive piezoelectric shunt damping", Proc. SPIE 4693, Smart Structures and Materials 2002: Modeling, Signal Processing, and Control, (10 July 2002); https://doi.org/10.1117/12.475253

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