Design and optimize of high tolerance support structure for large aperture space mirror

doi:10.3788/OPE.20192705.1138

CIOMP OpenIR

	Design and optimize of high tolerance support structure for large aperture space mirror
	J.Guo; L.Zhu; J.Zhao; D.-P.Gong
	2019
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	27 期号:5 页码:1138-1147
摘要	In a traditional space mirror, the stress of processing and assembling cannot be eliminated and this causes the surface accuracy of the mirror to degrade. In this study, an optimization method for a high-stability support structure for a space mirror was proposed to solve this problem. A 1.5-m aperture high-tolerance and high-accuracy space mirror for engineering applications was fabricated. First, the initial configuration of the mirror subassembly was designed based on theory and experience. The mirror was composed of reaction-bonded silicon carbide. A back-half open triangle was selected for the lightweight structure of the mirror, and a diaphragm-type flexure structure was used to support the mirror. The main dimensions of the supporting structure were then optimized using iSIGHT, and the minimum change of the root mean square (RMS) in nine situations with a 0.01-mm assembly error was chosen as the target. A mirror with a mass of 170.23 kg and lightweight ratio of 82.1% was obtained in 30 months. A series of tests revealed the following: The surface accuracy of the mirror was 0.016 RMS(=632.8 nm) under 1 g of gravity, and a 0.02-mm forced displacement on the interface of the structure caused no changes. The change scope was 0.002(RMS) in a (20 5 )temperature environment, and the first-order natural frequency of the subassembly was 101.3 Hz. The static stiffness, dynamic stiffness, accuracy of the surface, and environment adaptability of the subassembly were found to meet the requirements of commercial remote sensing. 2019, Science Press. All right reserved.
关键词	Optical testing,Ground supports,Mirrors,Remote sensing,Silicon carbide,Stiffness
DOI	10.3788/OPE.20192705.1138
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63357
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J.Guo,L.Zhu,J.Zhao,et al. Design and optimize of high tolerance support structure for large aperture space mirror[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2019,27(5):1138-1147.
APA	J.Guo,L.Zhu,J.Zhao,&D.-P.Gong.(2019).Design and optimize of high tolerance support structure for large aperture space mirror.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,27(5),1138-1147.
MLA	J.Guo,et al."Design and optimize of high tolerance support structure for large aperture space mirror".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 27.5(2019):1138-1147.

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