Research Papers

Design and Experimental Validation of Compact, Quick-Response Shape Memory Alloy Separation Device

[+] Author and Article Information
Xiaoyong Zhang

e-mail: zhangyong9119@163.com

Xiaojun Yan

e-mail: yanxiaojun@buaa.edu.cn
School of Energy and Power Engineering
Beihang University,
Xueyuan Road No. 37,
Haidian District,
Beijing 100191, China

Qiaolong Yang

China Academy of Space Technology,
Youyi Road,
Beijing 100191, China
e-mail: yang_qiao_long@hotmail.com

1Corresponding author.

Contributed by the Design Innovation and Devices of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received November 14, 2012; final manuscript received October 9, 2013; published online November 26, 2013. Assoc. Editor: Diann Brei.

J. Mech. Des 136(1), 011009 (Nov 26, 2013) (9 pages) Paper No: MD-12-1560; doi: 10.1115/1.4025795 History: Received November 14, 2012; Revised October 09, 2013

The shape memory alloy (SMA)-actuated separation devices that are currently used in small satellites were usually designed to handle large separation loads. As a result, they have complex structures, large footprints, and high power consumptions. In this paper, we report a simpler and more compact separation device. A design methodology for the load-shifting SMA actuator (LSSA) used in a device was developed. Four prototypes were fabricated and tested to demonstrate the design concept and the LSSA design methodology. Experiments showed that this separation device has the merits of a quick response time, compact size, and simple structure, which give it potential for small-satellite applications.

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Fig. 1

Design scheme of separation device

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Fig. 2

Operation stages of separation device: (a) pretrigger, (b) at trigger point, (c) at release point, and (d) after release

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Fig. 3

Force balance of sleeve during operations: (a) before trigger point and (b) after release

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Fig. 4

Schematic diagram of LSSA

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Fig. 5

LSSA design concept

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Fig. 6

Influence of spring rate on output displacement of LSSA

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Fig. 7

Experimental load–displacement data for selected SMA wire

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Fig. 8

Force analysis of nut segment

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Fig. 9

Actuation curves of LSSA (experiment versus simulation)

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Fig. 10

Experiment setup for LSSA

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Fig. 11

Prototypes of separation device

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Fig. 12

Actuation curve depicting separation device's operation process

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Fig. 13

Experimental setup for separation load test

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Fig. 14

Response time as function of separation force

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Fig. 15

Response time and required energy as function of power consumption

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Fig. 16

Folded solar array simulator fastened by four devices on vibration table




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