Mechanical analysis of pointing mechanism for space spectrometer

	Mechanical analysis of pointing mechanism for space spectrometer
	Liu, L.
	2015
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
卷号	23 期号:11 页码:3161-3167
摘要	To accurately analyze dynamic characteristics of pointing mechanism of a CO2space spectrometer, a bearing finite element contact analysis model was established according to the bearing structural parameters in this paper. The displacements with different loads for an axis were calculated, and the nonlinear stiffness curve for the bearing was obtained by the polynomial fitting for calculated results. In finite element dynamic analysis model of pointing mechanism, a spring unit with corresponding stiffness was used to replace the bearing structure, and the dynamic characteristics of the pointing mechanism were obtained by analysis of infinite element frequency response. The simulation experiment shows that the surface shape of mirror is 19.23 nm and 19.27 nm in optics axis and meridian direction at a static condition, which satisfy the design requirement of /30(RMS, =632.8 nm) and all base frequencies in 3 directions are over 100 Hz. Moreover, mechanical vibration experiments also verify that all base frequencies in 3 directions are over 100 Hz and the surface shape accuracy of the mirror is /35. The calculation results agree well with the experimental results. It concludes that the analysis method with nonlinear contact solves the bearing stiffness accurately, and the static/dynamic performance of pointing mechanism meets design requirements. 2015, SCIENCE PRESS. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56064
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu, L.. Mechanical analysis of pointing mechanism for space spectrometer[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(11):3161-3167.
APA	Liu, L..(2015).Mechanical analysis of pointing mechanism for space spectrometer.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(11),3161-3167.
MLA	Liu, L.."Mechanical analysis of pointing mechanism for space spectrometer".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.11(2015):3161-3167.

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