基于应变的变形副反射面位姿形貌快速重构方法  

Rapid Reconfiguration Method for Deformed Subreflector Position Attitude and Shape Based on Strain

作　　者：许谦[1,2] 王从思[1,3] 易乐天 XU Qian;WANG Cong-si;YI Le-tian(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Urumqi 830011;Key Laboratory of Electronic Equipment Structure Design,Xidian University,Ministry of Education,Xi'an 710071)

机构地区：[1]中国科学院新疆天文台,乌鲁木齐830011 [2]中国科学院射电天文重点实验室,乌鲁木齐830011 [3]西安电子科技大学电子装备结构设计教育部重点实验室,西安710071

出　　处：《天文学报》2020年第5期44-51,共8页Acta Astronomica Sinica

基　　金：新疆维吾尔自治区天山创新团队计划(2018D14008);中国科学院西部之光计划(2017-XBQNXZ-B-024);中国科学院青年创新促进会项目(2016058);中国科学院天文台站设备更新及重大仪器设备运行专项经费资助;国家自然科学基金项目(U1737211);新疆维吾尔自治区天池百人计划2017。

摘　　要：随着双反射面天线口径的增大、工作频段的升高,天线对副反射面的精度要求也越来越高.当天线受到自重以及风荷、温度等外界因素的影响时,为了更好地保证满足天线的高指向精度等电性能要求,基于应变传感器和模态叠加原理,分别利用天线变形后副反射面支撑腿与副反射面自身结构的应变值来快速重构副反射面的位姿、形貌,便于副反射面调整机构对其进行实时修正,以实现更加精准的主副反射面位置匹配,降低因天线结构变形造成的波束指向误差和增益损失.With the increase of aperture and observation frequency of dual-reflector antenna,the requirement for subreflector position precision is becoming higher and higher.When antenna is influenced by its own weight,wind,and temperature,etc.,in order to better meet the requirements of high pointing accuracy and high electrical performance,based on the strain sensor and principle of modal superposition,the position,attitude,and morphology of subreflector is rapidly reconstruct using the strain values of deformed supporting legs and deformed subreflector surface,which is convenient for the real-time correction of the subreflector by adjustment mechanism,and to achieve a more accurate position matching of the main and subreflector surfaces,so the beam pointing errors and gain losses due to deformation of the antenna structure are reduced.

关 键 词：双反射面天线 副反射面 应变 模态叠加 变形 

分 类 号：P111[天文地球—天文学]