Optimization Design of Supporting Backplate for Ultra-Light Space Camera

doi:10.3788/AOS201939.0322001

CIOMP OpenIR

	Optimization Design of Supporting Backplate for Ultra-Light Space Camera
	M.Shao; L.Zhang; L.Li; L.Wei
	2019
发表期刊	Guangxue Xuebao/Acta Optica Sinica
ISSN	02532239
卷号	39 期号:3
摘要	According to the requirements of ultra-light and high thermal stability of a space camera, an integrated backplate structure is designed so that the supporting backplate is not only the backplate of the main mirror, but also the main bearing plate of the space camera. The SiC with high specific stiffness and high thermal stability is used as the backplate material. The layout of back ribs is determined by the variable density topology optimization with the addition of a minimum size constraint. The size optimization design is completed by a multi-objective optimization model with Non-dominated Sorting Genetic Algorithm II (NSGA-II), integrating the mirror surface shape and the mass of the backplate. The mass of the backplate is only 0.591 kg and the minimum rib thickness is 2.1 mm. The dynamic and static performances of the optimization results are finally analyzed by the finite element analysis. The results show that the root-mean-square value of the mirror shape in the mirror assembly is 0.158 nm under a temperature rising load of 5, which means good thermal stability. The root-mean-square value of the mirror shape is 1.169 nm and the peak to valley value is 5.403 nm under the X-direction gravity load (the direction perpendicular to the optical axis/the direction of detecting surface shape). The first-order intrinsic frequency of the mirror assembly is 397 Hz and the random vibration response value of the sampling point of the mirror edge is less than 16g. These mean the requirements for space application are satisfied. 2019, Chinese Lasers Press. All right reserved.
关键词	Shape optimization,Cameras,Finite element method,Genetic algorithms,Mirrors,Multiobjective optimization,Silicon carbide,Silicon compounds,Thermodynamic stability
DOI	10.3788/AOS201939.0322001
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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/181722/63081
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	M.Shao,L.Zhang,L.Li,et al. Optimization Design of Supporting Backplate for Ultra-Light Space Camera[J]. Guangxue Xuebao/Acta Optica Sinica,2019,39(3).
APA	M.Shao,L.Zhang,L.Li,&L.Wei.(2019).Optimization Design of Supporting Backplate for Ultra-Light Space Camera.Guangxue Xuebao/Acta Optica Sinica,39(3).
MLA	M.Shao,et al."Optimization Design of Supporting Backplate for Ultra-Light Space Camera".Guangxue Xuebao/Acta Optica Sinica 39.3(2019).

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