Precise position control using shape memory alloy wires

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...

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Published inElektrik : Turkish journal of electrical engineering & computer sciences Vol. 18; no. 5; pp. 899 - 912
Main Authors DÖNMEZ, Burcu, ÖZKAN, Bülent, KADIOĞLU, Suat
Format Journal Article
LanguageEnglish
Published TUBITAK 01.01.2010
TÜBİTAK
Subjects
Akıllı sistem
Benzetim
Biçim bellekli alaşım
Control Engineering
Deneysel çalışma
Experimental study
Intelligent system
Kontrol Mühendisliği
Konum kontrolü
Metalik Malzemeler
Metallic Materials
position control
shape memory alloy
Shape memory alloy wire, precise control, smart materials, computer simulations, experiment
simulation
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Summary: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.
Bibliography:http://dergipark.ulakbim.gov.tr/tbtkelektrik/article/view/5000020016
TMUH
ISSN:1300-0632
1303-6203
DOI:10.3906/elk-0906-14