State-of-the-art actuators that produce rotatory motion and torsional moment are based on either combustion engines, electro-motors, hydraulic or pneumatic machines. Each of these actuation methods has several drawbacks. All of these systems often come with high initial costs, big weight and need a lot of construction space because of their dimensions. Shape memory alloys are known for their superior energy density. That allows for the construction of very compact and light-weight actuator systems. In this paper, the design and construction of a light weight rotational actuator based on SMA wires is presented. The design is based on a modular concept, with each module contributing to the total rotational radius. This way, the actuator can be custom fitted to specific application needs.
- Aerospace Division
Modular SMA-Based Bi-Directional Rotational Actuator
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Motzki, P, Britz, R, & Seelecke, S. "Modular SMA-Based Bi-Directional Rotational Actuator." Proceedings of the ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 1: Multifunctional Materials; Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Structural Health Monitoring. Stowe, Vermont, USA. September 28–30, 2016. V001T04A001. ASME. https://doi.org/10.1115/SMASIS2016-9017
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