Precision Analysis and Experiment of Focusing Mechanism of Space Hyperspectral Camera

被引：4
作者：
Wang K. [1 ,2 ]
Xu M. [1 ]
Xie P. [1 ]
Xu Z. [1 ]
Tao S. [1 ]
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] University of Chinese Academy of Sciences, Beijing
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2019年 / 55卷 / 12期
关键词：
CMOS target plane; Dynamics; Focusing mechanism; Hyperspectral camera; Precision analysis;
D O I：
10.3901/JME.2019.12.029
中图分类号：
学科分类号：
摘要：
For meeting the features and requirements of space hyperspectral camera, the image surface movable focusing mechanism is designed, the motion displacement is in the range of ±3 mm, correcting deviated focal plane, and meeting the imaging quality requirements of hyperspectral camera. The working principle of the focusing mechanism is introduced, and the transmission curve and positioning accuracy are theoretically analyzed; Dynamic model of the focusing mechanism is established and the finite element analysis is performed. The relationship test method of code value and displacement of CMOS target plane is discussed in detail, and obtain the reliable focusing formula. The dynamic experiments show that the first-order natural frequency of the focusing mechanism is 182.7 Hz, which can effectively avoid the resonance phenomenon, the acceleration response is reasonable, and has good strength and stiffness; Before and after the dynamic experiments, the closed-loop accuracy tests are performed on the focusing mechanism, and the positioning accuracy is better than ±6 μm, therefore the focusing mechanism has good stability, which satisfies the ±10 μm design index and verifies the effectiveness of focusing formula and closed-loop control programs. At present, this set of focusing mechanism has been successfully on-orbit operation, and the indicators are in good condition, which satisfies the imaging quality requirements of hyperspectral camera. © 2019 Journal of Mechanical Engineering.
引用
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页码：29 / 36
页数：7
相关论文
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