A Calibration Mechanism Based on Worm Drive for Space Telescope

被引:1
|
作者
Chong, Yaqin [1 ,2 ]
Li, Chuang [1 ]
Xia, Siyu [1 ]
Zhong, Peifeng [1 ,2 ]
Lei, Wang [1 ]
机构
[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, 17 Xinxi Rd, Xian 710119, Shaanxi, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
来源
PACIFIC RIM LASER DAMAGE 2017-OPTICAL MATERIALS FOR HIGH-POWER LASERS | 2017年 / 10339卷
关键词
calibration mechanism; diffuse plate; worm gear reducer; finite element analysis; counterweigh block; end stop;
D O I
10.1117/12.2269878
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, a new type of calibration mechanism based on worm drive is presented for a space telescope. This calibration mechanism based on worm drive has the advantages of compact size and self-lock. The mechanism mainly consists of thirty-six LEDs as the light source for flat calibration, a diffuse plate, a step motor, a worm gear reducer and a potentiometer. As the main part of the diffuse plate, a PTFE tablet is mounted in an aluminum alloy frame. The frame is fixed on the shaft of the worm gear, which is driven by the step motor through the worm. The shaft of the potentiometer is connected to that of the worm gear to measure the rotation angle of the diffuse plate through a flexible coupler. Firstly, the calibration mechanism is designed, which includes the LEDs assembly design, the worm gear reducer design and the diffuse plate assembly design. The counterweight blocks and two end stops are also designed for the diffuse plate assembly. Then a modal analysis with finite element method for the diffuse plate assembly is completed.
引用
收藏
页数:9
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