考虑扭簧失效的桁架式可展开天线可靠性研究  

Reliability analysis of truss deployable antenna considering torsional spring failure

作　　者：张惠峰[1] 关富玲[1] 侯国勇 

机构地区：[1]浙江大学土木系空间结构研究中心,浙江杭州310058 [2]浙江省城乡规划设计研究院,浙江杭州310007

出　　处：《浙江大学学报（工学版）》2010年第6期1207-1212,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(69982009)

摘　　要：利用故障树理论建立桁架式可展开天线失效模型,在此基础上,采用概率理论推导出天线系统失效概率方程,利用动力学理论建立桁架式可展开天线展开分析方程,对不同位置处扭簧失效时天线的展开过程进行分析,进而得出扭簧失效时使天线无法完全展开或使其展开形面精度很差的扭簧位置和失效后对天线展开及其展开形面精度基本没有影响的扭簧位置;将此分析结果引入可靠性分析中,可以使可展桁架天线的可靠性分析更准确.通过一个算例计算了桁架式可展开天线的可靠度,得其可靠度为0.999787571.A failure model of the truss deployable antenna was established using faulty tree theory,and based on which failure probability formulations for the antenna system were deduced using probability theory. Deployment analysis formulations for truss deployable antenna were established using dynamic theory. The deployment process of the antenna was analyzed when there were torsional spring failures at different positions,then those positions where the antenna could not deploy fully or the surface error was very high when torsional springs failed were obtained,and those positions where the antenna could deploy smoothly and the surface error was low when torsional springs failed were also obtained. Combining these results and reliability analysis,the reliability of deployable truss antenna can be analyzed accurately. Finally,the reliability degree of truss deployable antenna was analyzed with an example,and the result is 0.999 787 571.

关 键 词：可展开天线 可靠性 扭簧失效 展开分析 

分 类 号：V414.1[航空宇航科学与技术—航空宇航推进理论与工程] TB114.3[理学—概率论与数理统计]