Evaluation and test of self-locking ability for focusing mechanism of space camera

doi:10.3788/OPE.20182602.0355

CIOMP OpenIR

	Evaluation and test of self-locking ability for focusing mechanism of space camera
	An, Yuan; Du, Yi-Min; Jia, Xue-Zhi; Li, Lin; Li, Ji; Ke, Shan-Liang
	2018
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	26 期号:2 页码:355-362
摘要	Focusing mechanisms in space camera needs to possess self-locking ability to resist the shock and vibration in the process of launching. Therefore, a self-locking analysis on the mechanism is the key of ensuring the space optics remote sensors work properly. This paper studied the sliding mechanism of thread contact surface under environments of vibration, and built a engineering models of the focusing mechanism of certain space camera with two types of screw pitch (1 mm, 1.5 mm). Contact stress, shear stress distribution and self-locking ability of the mechanism were researched in detail. The results showed that the Mises stress value of focusing mechanism with screw pitch 1 mm was bigger than its calibration value of self-locking, which means self-locking lost efficacy. The Mises stress value of focusing mechanism with screw pitch 1.5 mm was under its calibration value of self-locking, which means self-locks was effective. Finally, a random variation test was performed on the focusing mechanism. The results showed that the focal plane's displacement of the mechanism with 1 mm screw pitch reached 2 753 m, resulting in failure of self-locking. On the contrary, the focal plane's displacement of the mechanism with 1 mm screw pitch reached 6 m, which was less than measuring error, the mechanism worked properly. It can be seen that the analysis approach proposed is effective, reliable, and provides a new way of researching the self-locking of focusing mechanism under the dynamic environment. 2018, Science Press. All right reserved.
关键词	Locks (fasteners) Calibration Cameras Focusing Remote sensing Screw threads Shear stress
DOI	10.3788/OPE.20182602.0355
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/181722/60655
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	An, Yuan,Du, Yi-Min,Jia, Xue-Zhi,et al. Evaluation and test of self-locking ability for focusing mechanism of space camera[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2018,26(2):355-362.
APA	An, Yuan,Du, Yi-Min,Jia, Xue-Zhi,Li, Lin,Li, Ji,&Ke, Shan-Liang.(2018).Evaluation and test of self-locking ability for focusing mechanism of space camera.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,26(2),355-362.
MLA	An, Yuan,et al."Evaluation and test of self-locking ability for focusing mechanism of space camera".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 26.2(2018):355-362.

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