65m射电望远镜天线结构指向精度分析与设计  

Analysis and Design on Pointing Precision of a 65 m Radio Telescope Antenna Structure

作　　者：米月英 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2014年第5期60-63,共4页Radio Engineering

基　　金：国家自然科学基金资助项目(ZX131020019)

摘　　要：针对国内口径最大、精度最高的65 m射电望远镜天线,分析计算了其结构指向精度。介绍了轨道组合、枢轴组合和测角装置等关键部件的精度设计过程和结构误差,以及其他重力和环境因素引起的误差。通过结果分析、现场实测和长期工作,证明了天线结构设计指向精度的均方根误差达到11.8″,去掉系统误差,天线指向精度的均方根误差有望达到2″的精度。The pointing precision of a 65 m radio telescope antenna with the largest caliber and highest accuracy in China is intro-duced. The factors that affect the pointing precision are analyzed, and then the accuracy design process of key assembles are listed, such as antenna railway, pivot, angular measuring devices, etc. Besides, the other factors that cause errors are introduced. Finally, by theoretical analysis, field measurements and long-term operation, it’ s proved that the root-mean-square error of antenna pedestal point-ing precision could be 11.8″. Not taking the system errors into account, the root-mean-square error could be 2″.

关 键 词：轮轨式天线座架 指向精度 枢轴 测角装置 

分 类 号：P111.44[天文地球—天文学]