A SMA-based redundant actuation locking device for rotary feed structure using self-locking principle

Xiaoyu Qin; Xiaojun Yan; Xiaoyong Zhang; Dianyin Hu; Weibing Wang; Lianghai Li

doi:10.1117/12.2218355

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20 April 2016 A SMA-based redundant actuation locking device for rotary feed structure using self-locking principle

Xiaoyu Qin, Xiaojun Yan, Xiaoyong Zhang, Dianyin Hu, Weibing Wang, Lianghai Li

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Proceedings Volume 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016; 98033C (2016) https://doi.org/10.1117/12.2218355
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

This paper presents a locking device which achieves in locking the rotary feed structure of a space-borne microwave radiometer during the launch stage. This locking device employs two shape memory alloy (SMA) wires as the actuating elements, and uses a self-locking structure to achieve the locking function. To improve the performance and reliability, a redundant SMA wire and a step structure are employed. To validate the proposed SMA locking device, four prototypes were fabricated and tested. The result shows that the locking device possesses the advantages of remarkable locking performances, wide operation electric current and high survival temperature. Based on the test results, the locking device has a great potential for the application of space rotary structures.

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Xiaoyu Qin, Xiaojun Yan, Xiaoyong Zhang, Dianyin Hu, Weibing Wang, and Lianghai Li "A SMA-based redundant actuation locking device for rotary feed structure using self-locking principle", Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 98033C (20 April 2016); https://doi.org/10.1117/12.2218355

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