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Proceedings Paper

Modeling and experimental verification using the sensoriactuator circuit for passive vibration damping
Author(s): Matthew Van Santen Kozlowski; Daniel G. Cole; Robert L. Clark
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Paper Abstract

It has been shown that passive electronic damping can be successfully achieved using tuned RL circuits to shunt piezoelectric materials on structures. These designs provide electronic equivalents of tuned-vibration dampers where the coupling coefficient plays the role of the mass ratio in similar mechanical devices and is the primary factor in determining performance. However, in many applications the coupling coefficient is too small to produce desired or acceptable changes in performance. In addition, changes in system parameters, such as the piezoelectric's capacitance, detune the system also limiting performance. A sensoriactuator circuit offers the ability to eliminate the effects of the piezoelectric's capacitance and improve the coupling coefficient. Thus, electronic dampers built with a sensoriactuator circuit could see improved performance over their strictly passive counterparts. A cantilevered beam test article is modeled with a sensoriactuator attached. The sensoriactuator and appropriate control filter are used in place of the passive shunt circuitry. An optimal circuit design criteria somewhat analogous to that of the resonant shunt damper is developed. The sensoriactuator circuit is built using this design criteria, and the effects of the sensoriactuator electronic damping scheme are included in the model.

Paper Details

Date Published: 27 June 2002
PDF: 11 pages
Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002); doi: 10.1117/12.472659
Show Author Affiliations
Matthew Van Santen Kozlowski, Duke Univ. (United States)
Daniel G. Cole, Duke Univ. (United States)
Robert L. Clark, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 4697:
Smart Structures and Materials 2002: Damping and Isolation
Gregory S. Agnes, Editor(s)

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