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Proceedings Paper

Conceptual design of a hybrid parallel mechanism for mask exchanging of TMT
Author(s): Jianping Wang; Hongfei Zhou; Kexuan Li; Zengxiang Zhou; Chao Zhai
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Paper Abstract

Mask exchange system is an important part of the Multi-Object Broadband Imaging Echellette (MOBIE) on the Thirty Meter Telescope (TMT). To solve the problem of stiffness changing with the gravity vector of the mask exchange system in the MOBIE, the hybrid parallel mechanism design method was introduced into the whole research. By using the characteristics of high stiffness and precision of parallel structure, combined with large moving range of serial structure, a conceptual design of a hybrid parallel mask exchange system based on 3-RPS parallel mechanism was presented. According to the position requirements of the MOBIE, the SolidWorks structure model of the hybrid parallel mask exchange robot was established and the appropriate installation position without interfering with the related components and light path in the MOBIE of TMT was analyzed. Simulation results in SolidWorks suggested that 3-RPS parallel platform had good stiffness property in different gravity vector directions. Furthermore, through the research of the mechanism theory, the inverse kinematics solution of the 3-RPS parallel platform was calculated and the mathematical relationship between the attitude angle of moving platform and the angle of ball-hinges on the moving platform was established, in order to analyze the attitude adjustment ability of the hybrid parallel mask exchange robot. The proposed conceptual design has some guiding significance for the design of mask exchange system of the MOBIE on TMT.

Paper Details

Date Published: 8 October 2015
PDF: 12 pages
Proc. SPIE 9678, AOPC 2015: Telescope and Space Optical Instrumentation, 967813 (8 October 2015); doi: 10.1117/12.2202374
Show Author Affiliations
Jianping Wang, Univ. of Science and Technology of China (China)
Hongfei Zhou, Univ. of Science and Technology of China (China)
Kexuan Li, Univ. of Science and Technology of China (China)
Zengxiang Zhou, Univ. of Science and Technology of China (China)
Chao Zhai, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 9678:
AOPC 2015: Telescope and Space Optical Instrumentation
Bin Xiangli; Dae Wook Kim; Suijian Xue, Editor(s)

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