Beam shape feedback control by means of a shape memory actuator

This paper presents an experimental investigation of an adaptive flexible beam actuated by means of an actuator made of Shape Memory Alloy. The deflection of a flexible beam is controlled by means of resistive heating of a shape memory actuator and cooling in the surrounding air. The shape memory ac...

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Bibliographic Details
Published in:Materials in engineering 2007, Vol.28 (5), p.1592-1596
Main Author: Silva, E.P. Da
Format: Article
Language:English
Subjects:
Adaptive structures
Shape memory actuators
Shape memory alloys
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Summary:This paper presents an experimental investigation of an adaptive flexible beam actuated by means of an actuator made of Shape Memory Alloy. The deflection of a flexible beam is controlled by means of resistive heating of a shape memory actuator and cooling in the surrounding air. The shape memory actuator consists of a NiTi wire fixed on the upper side of the beam. The heating of the wire causes it to contract, which in turn deflects the beam. A feedback control system was implemented to control this deflection, taking the Joule heat as the control variable. A number of control experiments were carried out using a proportional controller. The results obtained illustrate the potential of Shape Memory Actuators in the development of such applications.
ISSN:0261-3069
DOI:10.1016/j.matdes.2006.02.021