Research on lightweight passive deployment mechanism for the secondary mirror in the deployable space telescope

Peifeng Zhong; Chuang Li; Nan Jing; Yaqin Chong; Guorui Ren

doi:10.1117/12.2243221

25 October 2016 Research on lightweight passive deployment mechanism for the secondary mirror in the deployable space telescope

Peifeng Zhong, Chuang Li, Nan Jing, Yaqin Chong, Guorui Ren

Author Affiliations +

Proceedings Volume 9685, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; and Smart Structures and Materials; 968513 (2016) https://doi.org/10.1117/12.2243221
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China

Abstract

In this paper, a new type of lightweight passive deployment mechanism based on the tape spring and the shape memory alloy is presented for the secondary mirror of a deployable space telescope. In this passive deployment mechanism for the secondary mirror, the high elastic potential energy of the folded tape springs is used as driving force when the support structure is extended, and the high stiffness characteristics of the circular arc cross section of the tape spring can be used to achieve structure self-locking after deployment. Then a deployable space telescope combined with lightweight passive deployable mechanism for the secondary mirror is designed for applying to nanosatellite imaging. Furthermore, a lock-release device is designed to achieve the function of locking the folded structure and releasing on orbit by taking advantage of the phase transformation characteristics of shape memory alloy with temperature changing. Finally, the correction method for the deployment error of secondary mirror is discussed. The temperature of the tape springs is controlled respectively to make a required length change. This can achieve the purpose of adjusting the position of the secondary mirror and improve the deployment accuracy.

Citation Download Citation

Peifeng Zhong, Chuang Li, Nan Jing, Yaqin Chong, and Guorui Ren "Research on lightweight passive deployment mechanism for the secondary mirror in the deployable space telescope", Proc. SPIE 9685, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; and Smart Structures and Materials, 968513 (25 October 2016); https://doi.org/10.1117/12.2243221

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KEYWORDS

Mirrors

Shape memory alloys

Space telescopes

3D modeling

Optical instrument design

Titanium

Mirror structures

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