Mechanical design and analysis of focal plate for gravity deformation

Jianping Wang; Jiaru Chu; Hongzhuan Hu; Kexuan Li; Zengxiang Zhou

doi:10.1117/12.2055619

18 July 2014 Mechanical design and analysis of focal plate for gravity deformation

Jianping Wang, Jiaru Chu, Hongzhuan Hu, Kexuan Li, Zengxiang Zhou

Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 915134 (2014) https://doi.org/10.1117/12.2055619
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The surface accuracy of astronomical telescope focal plate is a key indicator to precision stellar observation. To conduct accurate deformation measurement for focal plate in different status, a 6-DOF hexapod platform was used for attitude adjustment. For the small adjustment range of a classic 6-DOF hexapod platform, an improved structural arrangement method was proposed in the paper to achieve ultimate adjustment of the focal plate in horizontal and vertical direction. To validate the feasibility of this method, an angle change model which used ball hinge was set up for the movement and base plate. Simulation results in MATLAB suggested that the ball hinge angle change of movement and base plate is within the range of the limiting angle in the process of the platform plate adjusting to ultimate attitude. The proposed method has some guiding significance for accurate surface measurement of focal plate.

Citation Download Citation

Jianping Wang, Jiaru Chu, Hongzhuan Hu, Kexuan Li, and Zengxiang Zhou "Mechanical design and analysis of focal plate for gravity deformation", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915134 (18 July 2014); https://doi.org/10.1117/12.2055619

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