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Proceedings Paper

Numerical simulation of the activation behavior of thermal shape memory alloys
Author(s): Reimund Neugebauer; André Bucht; Kenny Pagel; Jakob Jung
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Paper Abstract

Problems in using shape memory alloys (SMA) in industrial applications are often caused by the fragmentary knowledge of the complex activation behavior. To solve this problem, Fraunhofer IWU developed a Matlab®-based simulation tool to emulate the properties of a SMA wire based on the energy balance. The contained terms result of the characteristic material behavior combined with thermal, electrical, and mechanical conditions. Model validation is performed by laboratory tests. It is shown that there is almost no difference between the measured and the simulated actuator movement. Due to the good quality of the model it is possible to use it in a control loop. Knowing current and voltage enables the computation of the electrical resistance of the actuator and can therefore be used for feedback control. Implementation of the results into industrial applications is exemplified by integration of an actuator in a flap as used in air condition systems of cars. Furthermore, the SMA-based drive will be compared to an electromechanical drive.

Paper Details

Date Published: 29 March 2010
PDF: 12 pages
Proc. SPIE 7645, Industrial and Commercial Applications of Smart Structures Technologies 2010, 76450J (29 March 2010); doi: 10.1117/12.847594
Show Author Affiliations
Reimund Neugebauer, Fraunhofer-Institute for Machine Tools and Forming Technology (Germany)
André Bucht, Fraunhofer-Institute for Machine Tools and Forming Technology (Germany)
Kenny Pagel, Fraunhofer-Institute for Machine Tools and Forming Technology (Germany)
Jakob Jung, Fraunhofer-Institute for Machine Tools and Forming Technology (Germany)


Published in SPIE Proceedings Vol. 7645:
Industrial and Commercial Applications of Smart Structures Technologies 2010
M. Brett McMickell; Kevin M. Farinholt, Editor(s)

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