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Development of shape memory alloy actuators with inherent guidance function

Entwicklung von Formgedächtnisaktoren mit inhärenter Führungsfunktion
: Drossel, Welf-Guntram; Zorn, Wolfgang; Bucht, Andre; Kunze, Holger; Ettrichrätz, Martin; Pagel, Kenny


Mechatronics 30 (2015), S.254-258
ISSN: 0957-4158
Fraunhofer IWU ()
Shape-Memory-Alloys; actuators; wire-robot; inherent guidance function; adaptive control

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.