航天器环境工程2025，Vol.42Issue(6)：650-659,10.DOI:10.12126/see.2025030
多板式星载SAR天线展开机构装配误差建模与分析
Modeling and analysis of assembly errors in a multi-panel SAR antenna deployment mechanism
摘要
Abstract
To address the challenge of controlling assembly accuracy due to the coupled transmission of multiple errors in multi-panel synthetic aperture radar(SAR)antenna deployment mechanisms,a modular error modeling approach was proposed.The complex deployment structure was decomposed into functional modules—hinges,rods,and panels—based on series-parallel mechanism principles.Parametric assembly error models for each module were established using the closed-loop vector method.By linearly superimposing the error-transfer functions of the modules,the pose errors of the antenna panels were mapped to global geometric-tolerance sources,enabling the prediction of geometric accuracy in statically indeterminate rod systems.Partial differential methods were further employed to quantify the sensitivity coefficients of individual error sources.Assembly and adjustment tests on a 22 m×3 m antenna yielded a pointing accuracy better than 0.012°.The results demonstrate that the method provides a systematic theoretical tool for the digital assembly,adjustment,and tolerance optimization of SAR antennas,effectively enhancing on-orbit deployment accuracy and imaging performance.关键词
SAR天线机构/串并联耦合/闭环矢量法/装配误差建模/灵敏度分析Key words
SAR antenna mechanism/series-parallel coupling/closed-loop vector method/assembly error modeling/sensitivity analysis分类
机械制造引用本文复制引用
余精汉,侯鹏,马海龙,刘俊杰..多板式星载SAR天线展开机构装配误差建模与分析[J].航天器环境工程,2025,42(6):650-659,10.基金项目
国防基础科学研究计划项目 （）
