Calibration of Adjusting Mechanism for Subreflector of a 65 Meters Radio Telescope

Abstract

Abstract:

Based on the pose adjusting requirements, the calibration of a subreflector of antenna was performed herein. The process and scheme of the calibration of adjusting mechanism of the subreflector were identified firstly. The pose of the moving platform was measured using laser tracker, and according to the actual information of the motion parameters, the error function was constructed by the parallel mechanism theory. Then the kinematics parameters of the adjusting mechanism were identified by minimizing the error function. A calibration algorithm was developed and the calibration of the adjusting mechanism was performed. The structural parameters satisfied to the expected accuracy requirements were solved and the mechanism parameters were compensated. The research fruits herein have important guiding significance for the applications of the parallel mechanism in real engineering practice.

Key words: 65 meters radio telescope, subreflector of antenna, parallel mechanism, pose adjusting, calibration

摘要：

结合65m天线副反射面位姿调整任务要求,研究天线副反射面调整机构的标定问题。制定出副面调整机构标定流程与方案,利用激光跟踪仪测量机构动平台位姿,根据运动参数的实测信息,由并联机构学理论构造误差函数,并以误差函数最小化为目标进行机构运动学参数辨识;开发完成标定算法,对副面调整机构进行运动学标定，求解获得满足预期精度要求的结构参数，并对机构参数进行补偿。面向工程实际任务开展标定研究，研究结果对并联机构真正应用于工程实践具有重要的指导意义。

关键词: 65m射电望远镜, 天线副反射面, 并联机构, 位姿调整, 标定

CLC Number:

TH12

Hou Yulei, Duan Yanbin, Dou Yuchao, Yao Jiantao, Jin Chao, Li Jianjun, Zhao Yong. Calibration of Adjusting Mechanism for Subreflector of a 65 Meters Radio Telescope[J]. China Mechanical Engineering, 2013, 24(24): 3318-3322,3328.

侯雨雷, 段艳宾, 窦玉超, 姚建涛, 金超, 李建军, 赵永生. 65m射电望远镜天线副面调整机构标定研究[J]. 中国机械工程, 2013, 24(24): 3318-3322,3328.

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