- Turkish Journal of Electrical Engineering and Computer Science
- Vol: 18 Issue: 5
- Precise position control using shape memory alloy wires
Precise position control using shape memory alloy wires
Authors : Burcu Dönmez, Bülent Özkan, Suat Kadioğlu
Pages : 899-912
View : 7 | Download : 2
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Shape memory alloys (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