Study on moment correction method of primary mirror semi-active support

doi:10.3788/IRLA201948.0518003

CIOMP OpenIR

	Study on moment correction method of primary mirror semi-active support
	X.Liu; F.Wang; J.Zhang; L.Fan; W.Wang
	2019
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
ISSN	10072276
卷号	48 期号:5
摘要	In the development of large ground -based telescope technology, the primary mirror support technology is always a key technology. In this paper, a semi-active support method was researched based on a 2 m SiC lightweight primary mirror, which was used to correct some unpredictable low -order wavefront aberration caused by machining error, assembly error and other factors. Firstly, the finite element simulation model was established, and the finite element simulation was carried out. An unit correction moment (1 Nmm) of Mx or My, which were two orthogonal moments, was separately applied to the 6 Tripod soft hinge, so the primary mirror deformations under a total of 12 cases of the situation were respectively analyzed. And then with the linear superposition principle of small deformation, the correction ability of the moment correction method for low order wavefront aberration was analyzed and calculated. It could be seen from the analysis that the moment correction method could correct the tilt and astigmatism very well. The initial mirror RMS value of the tilt and initial astigmatism which were normalized to 1/10 (=632.8 nm), could be respectively corrected to 0.687 nm and 2.97 nm, the correction abilities were respectively 98.9% and 95.3%, and the required maximum correction moments were respectively 6.3 Nmm and 19.9 Nmm. Then, according to the whiffletree support structure of the primary mirror, a structure of the moment correction was designed with the leaf spring at the Tripod soft hinge. Finally, the feasibility of the leaf spring correction structure was verified through experiments, and the feasibility of the semi-active support scheme of moment correction was verified further. And a certain degree of engineering experience for the implementation of the moment correction method has been accumulated with high guiding significance. 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
关键词	Finite element method,Aberrations,Deformation,Electromagnetic wave attenuation,Leaf springs,Mirrors,Silicon carbide,Silicon compounds,Wavefronts
DOI	10.3788/IRLA201948.0518003
URL	查看原文
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/181722/63183
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	X.Liu,F.Wang,J.Zhang,et al. Study on moment correction method of primary mirror semi-active support[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2019,48(5).
APA	X.Liu,F.Wang,J.Zhang,L.Fan,&W.Wang.(2019).Study on moment correction method of primary mirror semi-active support.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,48(5).
MLA	X.Liu,et al."Study on moment correction method of primary mirror semi-active support".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 48.5(2019).

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