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ACTUATOR 2016 Manuscript C2.3


Author: Hubert Borgmann
eBook
Pages: 4
Language: English
Publication date: 01/06/2016
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Manuscript C2.3published in Conference Proceedings ACTUATOR 2016
Bi-Stable SMA Actuator

P. Motzki, S. Seelecke
ZeMA gGmbH, Saarbrücken, Germany, and Universität des Saarlandes, Saarbrücken, Germany

Abstract:
Shape Memory Alloy (SMA) actuators like SMA wires are already present in a few commercially available products, like valves or locking mechanisms. In these actuator systems, the SMA wires are always coupled with an additional biasing mechanism, such as a restoring coil spring. Other possible restoring forces are, for example, the gravitational force of a mass or the pulling force of a second SMA actuator. One drawback of an SMA actuator wire system, such as when coupled with a coil spring, is the continuous energy needed to remain in the contracted position. In this paper, a new SMA actuator design is presented that addresses and solves this drawback. In this actuator, a bi-stable snap mechanism is combined with a protagonist-antagonist SMA wire
configuration. In this way, the actuator has two defined stable and energy-free positions. The SMA wires are only activated to switch between these two positions.
El vendedor asume toda la responsabilidad de esta entrada.
Hubert Borgmann, MESSE BREMEN,
Project Manager ACTUATOR, International Conference and Exhibition on New Actuators and Drive Systems, Bremen, Germany, and Editor of the ACTUATOR Conference Proceedings (www.actuator.de)
Project Manager ITHEC, International Conference and Exhibition on Thermoplastic Composites, Bremen, Germany, and Editor of the ITHEC Conference Proceedings (www.ithec.de)

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