星载SAR天线展开机构装配精度确信可靠性建模  

Belief reliability modeling for assembly accuracy of spaceborne SAR antenna deployable mechanism

作　　者：李云 张湘霄 孙富强 李晓阳[2] 韩建超 LI Yun;ZHANG Xiangxiao;SUN Fuqiang;LI Xiaoyang;HAN Jianchao(Beijing Spacecraft Manufacturing Co.,Ltd.,Beijing 100094,China;School of Reliability and Systems Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京卫星制造厂有限公司,北京100094 [2]北京航空航天大学可靠性与系统工程学院,北京100191

出　　处：《北京航空航天大学学报》2024年第1期134-143,共10页Journal of Beijing University of Aeronautics and Astronautics

基　　金：可靠性与环境工程技术重点实验室稳定支持项目(WDZC20220101)。

摘　　要：星载合成孔径雷达(SAR)天线展开机构是空间桁架结构,其杆系和铰链的空间位置相互耦合,在装配过程中主要依赖于人工装调,装配精度难以准确控制,装配可靠性直接影响星载SAR天线的服役性能。为此,基于可靠性科学原理,提出星载SAR天线装配精度确信可靠性建模方法。考虑天线装配过程中影响装配精度的内因和外因,确定表征天线展开机构装配精度的性能指标及阈值,建立性能裕量模型。开展多源不确定性分析与量化,构建星载SAR天线展开机构装配精度确信可靠性模型。以某型号星载SAR天线展开机构为研究对象,进行可靠性敏感度分析和验证。研究结果表明:所提方法可为星载SAR天线展开机构装调提供理论指导,有效提高装配精度和效率。The deployable mechanism for a spaceborne synthetic aperture radar(SAR)antenna is a space truss structure,with the rod system and hinge coupled in space.Assembling accuracy is difficult to control precisely during the assembly process,and assembly reliability directly impacts the spaceborne SAR antenna’s service performance.Therefore,based on the principle of reliability science,a precision assurance reliability modeling method for spaceborne SAR antenna ground assembly is proposed in this paper.First,the performance index and threshold indicating the assembly accuracy of the antenna deployable mechanism were established,taking into account both internal and external elements that have an impact on the assembly accuracy in the antenna assembly process.Then,the multi-source uncertainty analysis and quantification were carried out to construct the assembly precision certainty reliability model of the spaceborne SAR antenna deployable mechanism.Finally,the reliability sensitivity analysis and verification of a spaceborne SAR antenna deployable mechanism are carried out.The results show that the proposed method can provide theoretical guidance for the mounting and adjusting of spaceborne SAR antenna deployable mechanism,and effectively improve the assembly accuracy and efficiency.

关 键 词：确信可靠性 天线展开机构 装配精度 性能裕量 不确定性 

分 类 号：TB114.3[理学—概率论与数理统计]