Design and analysis for focusing mechanism of space solar telescope

doi:10.19650/j.cnki.cjsi.J2107651

CIOMP OpenIR

	Design and analysis for focusing mechanism of space solar telescope
	B. Shan; H. Xin and C. Chen
	2021
发表期刊	Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
ISSN	2543087
卷号	42 期号:6 页码:1-8
摘要	According to the optical system characteristics and the structure of a space solar telescope, a focal plane focusing mechanism is designed to save the installation space and ensure the imaging quality. By using worm gear and cam chute groove as transmission parts, the circular motion of the stepping motor is transformed into linear motion in the normal direction of the focal plane. The focus range is 1.5 mm, the overall size is 167 mm64 mm94 mm and the mass is 2 kg. Two adjacent self-lubricating silicon nitride rings are arranged between the base back plate and the cam chute. It can increase the preloading force without affecting the rotation of the cam chute, improve the positioning accuracy to a certain extent, and reduce the backlash error. After that, the design scheme, resolution and self-locking capability of the focusing mechanism are introduced in detail, and the error sources, theoretical positioning accuracy and finite element model simulation are analyzed. Finally, the positioning accuracy test and vibration test of the focusing mechanism are carried out. The results show that the positioning accuracy is better than 4.5 m and the first-order mode is 349 Hz, which is basically consistent with the finite element simulation results. As a result, it has good dynamic stiffness and can effectively avoid resonance phenomenon. The encoder code values of the focusing mechanism are recorded before and after vibration test, which shows well self-locking performance. The focusing mechanism has the characteristics of small volume, large stiffness and high precision, which can well meet the working conditions of space solar telescope. 2021, Science Press. All right reserved.
DOI	10.19650/j.cnki.cjsi.J2107651
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收录类别	EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65136
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	B. Shan,H. Xin and C. Chen. Design and analysis for focusing mechanism of space solar telescope[J]. Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument,2021,42(6):1-8.
APA	B. Shan,&H. Xin and C. Chen.(2021).Design and analysis for focusing mechanism of space solar telescope.Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument,42(6),1-8.
MLA	B. Shan,et al."Design and analysis for focusing mechanism of space solar telescope".Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 42.6(2021):1-8.

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