空间索杆铰接式伸展臂故障树分析

结合空间索杆铰接式伸展臂的应用环境, 在分析空间索杆铰接式伸展臂组成和展开原理的基础上, 建立以伸展臂展开失效为顶事件的故障树, 分别对其进行定性及定量分析, 获得各底事件的失效概率、概率重要度和关键度结果, 确定引起伸展臂展开失效的主要因素. 结果表明驱动力不足、 角点滚轮卡死、精度失效是影响伸展臂正常展开的主要因素, 据此提出了相应的改进措施, 为空间索杆铰接式伸展臂的展开可靠性分析提供了依据. 

Fault Tree Analysis of the Space Cable-strut Deployable Articulated Mast

Combined the application environment of the space cable-strut deployable articulated mast, the fault tree of the deployable mast is established by considering the deploying failure of the mast as the top event based on the analysis of its composition and deployment mechanism, whose quantitative and qualitative analysis is finished for the fault tree of the deployable mast. And then the results of the probability of failure, important degree of probability and criticality are obtained and the main factors leading to the deploying failure of the mast are found out. The results show that the accurate deploying of the mast is influenced by lack of driving force, jamming on its roller card of the corner wheel and precision failure, which provides the foundation for the deploying reliability analysis of the space cable-strut deployable articulated mast