Control of high-frequency smart structures through embedded NiTiNOL fibers

A. V. Srinivasan; D. Michael McFarland; Howard A. Canistraro; Eric K. Begg

doi:10.1117/12.237039

26 April 1996 Control of high-frequency smart structures through embedded NiTiNOL fibers

A. V. Srinivasan, D. Michael McFarland, Howard A. Canistraro, Eric K. Begg

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237039
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

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.

Citation Download Citation

A. V. Srinivasan, D. Michael McFarland, Howard A. Canistraro, and Eric K. Begg "Control of high-frequency smart structures through embedded NiTiNOL fibers", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237039

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