| 赋形卡氏天线主面变形的副面实时补偿 |
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| 引用本文： | 冷国俊,王伟,段宝岩,李小平.赋形卡氏天线主面变形的副面实时补偿[J].系统工程与电子技术,2011,33(5):996. |
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| 作者姓名： | 冷国俊 王伟 段宝岩 李小平 |
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| 作者单位： | 1. 西安电子科技大学电子装备结构设计教育部重点实验室， 陕西 西安 710071;;
2. 中国电子科技集团公司第三十九研究所， 陕西 西安 710065 |
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| 摘 要： | 针对赋形卡氏天线主面变形导致电性能变差的情况，提出了一种通过实时调整副面位置对其进行补偿的方法。根据最小二乘法对赋形主面的母线离散数据进行分段抛物线拟合，用得到的一组标准抛物环面对变形后的主面进行最佳吻合，同时限定各抛物环面满足同焦轴约束。通过优化计算得出主面吻合参数，再根据主副面的匹配关系，计算副面的空间位置调整参数。将各工况下的副面调整参数存入数据库，实时调用以补偿主面变形。对某64 m天线进行了案例验证，得到了满意的结果。
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| 关 键 词： | 深空网 赋形反射面 主面变形 副面补偿 最佳吻合抛物面 |
Subreflector real-time compensation for main reflector deformation of shaped Cassegrain antenna |
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| LENG Guo-jun,WANG Wei,DUAN Bao-yan,LI Xiao-ping.Subreflector real-time compensation for main reflector deformation of shaped Cassegrain antenna[J].System Engineering and Electronics,2011,33(5):996. |
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| Authors: | LENG Guo-jun WANG Wei DUAN Bao-yan LI Xiao-ping |
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| Institution: | 1. Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, Xi’an 710071, China；;
2. 39th Institute of China Electronics Technology Group Corporation, Xi’an 710065, China |
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| Abstract: | On the degradation of electrical performance of large shaped Cassegrain antennas by the main reflector deformation, a method for compensation by the moving subreflector is presented. A group of best fit paraboloids are found by least square fitting the theoretical discrete data. The group of paraboloids are used to fit the deformed main reflector, with the constraint of all these focuses being in line. The best fit parameters are optimized and the adjustments of subreflector are derived with the ratio of main reflector and subreflector. The adjustments at various attitudes are saved in a look up table to real time compensate for main reflector deformation. From the experimental verification on a 64 m reflector antenna, satisfactory results are obtained. |
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