Development of a shape memory alloy wire actuator to operate a morphing wing
In Lee 1
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KAIST, School of Mechanical, Aerospace and Systems Engineering, Daejeon, Korea
University of South Carolina, Department of Mechanical Engineering, Columbia, USA
Journal of Theoretical and Applied Mechanics 2014;52(2):519–531
DSC tests were performed on several types of SMAs to verify the phase-transformation temperatures, and then experiments to examine their characteristics were carried out. An electric-current was supplied to the SMA wire to measure the appropriate operational current range. The force generated by the SMA wire increased according to the supplied current; but it diminished when the over-current was supplied because thermo-mechanical properties of the wire started to degrade. The appropriate stress range for effective actuation characteristics was also investigated. The SMA wire actuator was designed to operate a morphing wing. Experiments for the wing were conducted to verify its characteristics and it was smoothly deformed.