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标题：Scalable Bi-Directional SMA-Based Rotational Actuator
其他标题：Scalable Bi-Directional SMA-Based Rotational Actuator
本地全文：下载
作者：Rouven Britz ; Paul Motzki ; Stefan Seelecke 等
期刊名称：Actuators
电子版ISSN：2076-0825
出版年度：2019
卷号：8
期号：3
页码：60
DOI：10.3390/act8030060
出版社：MDPI Publishing
摘要：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.
关键词：SMA; shape memory alloy; rotational actuator; antagonistic system SMA ; shape memory alloy ; rotational actuator ; antagonistic system