Shape memory alloys (SMAs) are active metallic ``smart'' materials used as actuators and sensors in high technology smart systems . The term shape memory refers to ability of certain materials to ``remember'' a shape, even after rather severe deformations: once deformed at low temperatures, these materials will stay deformed until heated, whereupon they will return to their original, pre-deformed ``learned'' shape . This property can be used to generate motion and/or force in electromechanical devices and micro-machines. However, the accuracy of SMA actuators is severely limited by their highly nonlinear stimulus-response characteristics. In this work, modeling, simulation, and experimental efforts to precisely control the position of a Ni-Ti based shape memory alloy wire is presented. In this content three separate control strategies are tried and very good positioning accuracies are obtained.
DÖNMEZ, BURCU; ÖZKAN, BÜLENT; and KADIOĞLU, FEVZİ SUAT
"Precise position control using shape memory alloy wires,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 18:
5, Article 12.
Available at: https://journals.tubitak.gov.tr/elektrik/vol18/iss5/12