19 June 2000 Controlled continuous tuning of an adaptively tunable vibration absorber incorporating shape memory alloys
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Abstract
Controlled continuous tuning of the stiffness of shape memory alloy (SMA) spring elements of an adaptively tunable vibration absorber (ATVA) is a novel concept for adaptive-passive vibration control. Minimization of the vibration of a primary system is achieved indirectly via stiffness control of the SMA structural elements supporting a secondary mass. Stiffness control is further achieved via the heating of the SMA elements. In this paper a control law to achieve phase- tracking by controlling the heating of the SMA elements is developed and implemented. Successful analytical and experimental results demonstrate the feasibility of continuous control of the SMA ATVA. Performance of the SMA ATVA is compared to the performance of comparable passive tuned vibration absorbers (TVA). The comparison shows that substantial improvements in vibration attenuation can be achieved through the implementation of the SMA ATVA.
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Keith A. Williams, Keith A. Williams, George T.C. Chiu, George T.C. Chiu, Robert J. Bernhard, Robert J. Bernhard, } "Controlled continuous tuning of an adaptively tunable vibration absorber incorporating shape memory alloys", Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); doi: 10.1117/12.388800; https://doi.org/10.1117/12.388800
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