Please use this identifier to cite or link to this item: doi:10.22028/D291-28411
Title: Scalable Bi-Directional SMA-Based Rotational Actuator
Author(s): Britz, Rouven
Motzki, Paul
Seelecke, Stefan
Language: English
Title: Actuators
Volume: 8
Issue: 3
Publisher/Platform: MDPI
Year of Publication: 2019
Free key words: SMA
shape memory alloy
rotational actuator
antagonistic system
DDC notations: 600 Technology
Publikation type: Journal Article
Abstract: In industrial applications, rotatory motions and torques are often needed. State-of-the-art actuators are based on either combustion engines, electro-motors, hydraulic, or pneumatic machines. The main disadvantages are the construction space, the high weight, and a large amount of needed peripheral devices. To overcome these limitations, compact and light-weight actuator systems can be built by using shape memory alloys (SMAs), which are known for their superior energy density. In this paper, the development of a scalable bi-directional rotational actuator based on SMA wires is presented. The scalability was based on a modular design, which allowed the actuator to be adapted to various application specifications by customizing the rotational angle and the output torque. On the mechanical side, each module enabled a small rotatory motion, which added up to the total angle of the actuator. The SMA wires were arranged in an agonist-antagonist configuration to provide active rotation in both directions. The presented prototype achieved a total rotation of 100°. The modularity of the mechanical concept is also reflected in the electronics, which is discussed in this paper as well. This consideration allows the electronics to be adapted to the mechanics with minimal changes. As a result, a prototype, including the presented mechanical and electronic design, is reported in this study.
DOI of the first publication: 10.3390/act8030060
Link to this record: urn:nbn:de:bsz:291--ds-284112
ISSN: 2076-0825
Date of registration: 13-May-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Systems Engineering
Professorship: NT - Keiner Professur zugeordnet
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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