Development of shape memory alloy actuators with inherent guidance function

Shape-Memory-Alloys (SMA) are suited for miniaturized drives since they possess a high specific workload and scalability. However, most SMA drives still require guidance to realize stiffness. But, there is a design approach for actuators which realize both. Here, the stiffness in the non-moving dire...

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Bibliographic Details
Published in:Mechatronics (Oxford) 2015-09, Vol.30, p.254-258
Main Authors: Drossel, W.-G., Zorn, W., Bucht, A., Kunze, H., Ettrichraetz, M., Pagel, K.
Format: Article
Language:English
Subjects:
Actuators
Adaptive control
Inherent guidance function
Lightweight design
Shape-Memory-Alloys
Wire-robot
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Summary:Shape-Memory-Alloys (SMA) are suited for miniaturized drives since they possess a high specific workload and scalability. However, most SMA drives still require guidance to realize stiffness. But, there is a design approach for actuators which realize both. Here, the stiffness in the non-moving directions is achieved by the arrangement of the SMA as wire robot. This paper presents a general description of such actuators. Based on that the design of such actuators is formulated as a mathematical optimization algorithm providing a correlation between the variables for design and specification. In order to evaluate this approach, a rotary and a linear actuator are designed and experimentally investigated.
ISSN:0957-4158
1873-4006
DOI:10.1016/j.mechatronics.2015.07.011