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Precision evaluation method for the sub-reflector adjustment mechanism of Shanghai 65 meters radio telescope

机译：上海65米射电望远镜副镜调整机构的精度评估方法

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摘要

In this paper, the configuration of the sub-reflector adjustment mechanism of Shanghai 65 meters radio telescope is introduced, and the kinematics calibration is performed by the laser tracker for institutions. Secondly, based on the strong coupling characteristics of the parallel mechanism, a method contains a coupled repeated positioning accuracy information is proposed which is suitable for the parallel mechanism repeated positioning accuracy measurement and evaluation. Finally, according to the proposed repeated positioning accuracy measurement and evaluation methods, the uniaxial repeated positioning accuracy and spatial pose repeat precision of the adjustment mechanism of sub-reflector are measured and analysed. The results show that the repeated positioning accuracy of the adjustment mechanism of sub-reflector is high and is able to meet the requirements of the pointing adjustment precision of the sub-reflector of 65 meter radio telescope.
机译：介绍了上海65米射电望远镜的副反射镜调节机构的结构，并利用激光跟踪仪对机构进行了运动学标定。其次，基于并联机构的强耦合特性，提出了一种包含耦合重复定位精度信息的方法，适用于并联机构重复定位精度的测量与评估。最后，根据提出的重复定位精度的测量和评估方法，对副反射镜调节机构的单轴重复定位精度和空间姿态重复精度进行了测量和分析。结果表明，副反射镜调整机构的重复定位精度较高，能够满足65米射电望远镜副反射镜指向调整精度的要求。

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