A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m

doi:10.1016/j.ijleo.2018.09.108

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	A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m
	Z.S.Wang; J.X.Zhang; J.X.Wang; X.He; L.T.Fu; F.X.Tian; X.F.Liu; Y.C.Zhao
	2019
发表期刊	Optik
ISSN	0030-4026
卷号	179 页码:499-504
摘要	The larger the aperture of the mirror, the more sensitive it was to the disturbance of temperature and gravity load. So that it was more difficult to guarantee the accuracy of the surface shape. Therefore, the large aperture mirror needs exact constraint and positioning especially. In this paper, the exact constraint theory was applied. The constraint line diagram of 2.8m diameter mirror was drawn by dual line rule. Parallel mechanical connections add constraints and series mechanical connections add the degrees of freedom. According to this principle, the tangential flexible support structure and the axial flexible support structure were designed synthetically by the constraint line diagram, by which the 6 degrees of freedom of the mirror was constrained. There is neither overconstraint nor underconstraint. By means of finite element analysis calculation, under temperature rise 3 working conditions, the surface shape accuracy RMS value of the mirror was 7.5nm. Under self-gravity load on the mirror with gravity compensation device, the surface shape accuracy RMS value of the mirror was 6.4nm. The results showed, this support method finally realized the exact constraint of this large aperture mirror, and sensitivity to temperature and gravity load disturbances was within acceptable range.
关键词	Large aperture mirror,Exact constraint,Flexible structure,Finite,element analysis,Optics
DOI	10.1016/j.ijleo.2018.09.108
收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62958
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	Z.S.Wang,J.X.Zhang,J.X.Wang,et al. A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m[J]. Optik,2019,179:499-504.
APA	Z.S.Wang.,J.X.Zhang.,J.X.Wang.,X.He.,L.T.Fu.,...&Y.C.Zhao.(2019).A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m.Optik,179,499-504.
MLA	Z.S.Wang,et al."A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m".Optik 179(2019):499-504.

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