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Proceedings Paper

Control of high-frequency smart structures through embedded NiTiNOL fibers
Author(s): A. V. Srinivasan; D. Michael McFarland; Howard A. Canistraro; Eric K. Begg
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Paper Abstract

A method to increase the usable bandwidth of shape memory alloy (SMA) actuators for structural control is investigated. Because the change in material properties exploited in SMA components requires significant temperature variation, usually achieved through resistive heating, the response time of SMA actuators is ultimately limited by heat transfer in many applications. Typically, very rapid heating can be achieved but the time needed for cooling is long compared to the vibratory period of a mechanical or civil structure. By using several actuators in parallel and energizing subsets of these during successive cycles of structural motion, an effective bandwidth can be achieved that is greater than the bandwidth possible with a single actuator. This is demonstrated here for an active structural system comprised of SMA wires embedded in the outer laminae of a composite beam specimen. The beam was mounted as a cantilever and its first and second modes of vibration were excited by energizing the embedded wires.

Paper Details

Date Published: 26 April 1996
PDF: 6 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237039
Show Author Affiliations
A. V. Srinivasan, Worcester Polytechnic Institute (United States)
D. Michael McFarland, Univ. of Connecticut (United States)
Howard A. Canistraro, Univ. of Connecticut (United States)
Eric K. Begg, Univ. of Connecticut (United States)


Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials
Pierre Francois Gobin; Jacques Tatibouet, Editor(s)

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