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Proceedings Paper

New method for multiple-mode shunt damping of structural vibration using a single piezoelectric transducer
Author(s): Sam Behrens; Andrew J. Fleming; S. O. Reza Moheimani
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Paper Abstract

A new multi-mode semi-active shunt technique for controlling vibration in piezoelectric laminated structures is proposed in this paper. The effect of the ``negative capacitor'' controller is studied theoretically and then validated experimentally on a piezoelectric laminated simply-supported beam. The negative capacitor controller is similar in nature to passive shunt damping techniques, as a single piezoelectric transducer is used to dampen multiple modes. While achieving comparable performance to that of the purely piezoelectric passive shunt schemes, the negative capacitor controller has a number of advantages. It is simpler to implement, less sensitive to environmental variations, and can act as a multiple mode and broadband vibration controller. Experimental resonant amplitudes for the piezoelectric laminated simply-supported beam 1st, 2nd, 3rd, 4th and 5th modes were successfully reduced by 6.1, 16.3, 15.2, 11.7 and 10.2dB.

Paper Details

Date Published: 2 July 2001
PDF: 12 pages
Proc. SPIE 4331, Smart Structures and Materials 2001: Damping and Isolation, (2 July 2001); doi: 10.1117/12.432707
Show Author Affiliations
Sam Behrens, Univ. of Newcastle (Australia)
Andrew J. Fleming, Univ. of Newcastle (Australia)
S. O. Reza Moheimani, Univ. of Newcastle (Australia)

Published in SPIE Proceedings Vol. 4331:
Smart Structures and Materials 2001: Damping and Isolation
Daniel J. Inman, Editor(s)

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