Precise position control using shape memory alloy wires

Authors : Burcu DÖNMEZ, Bülent ÖZKAN, Suat KADIOĞLU

Pages : 899-912

View : 10 | Download : 4

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Shape memory alloys insert ignore into journalissuearticles values(SMAs); are active metallic ``smart`` materials used as actuators and sensors in high technology smart systems [1]. 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 [2]. 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.
Keywords : Shape memory alloy wire, precise control, smart materials, computer simulations, experiment