大型星载天线的展开系统失效树分析

针对某周边桁架式大型星载天线进行了展开可靠性研究，重点在于展开机构的运动可靠性。首先分析了该大型天线的展开机理，并应用失效树分析方法建立起展开系统的失效树。随后探讨了星载天线展开机构可靠性的建模和底事件的失效概率计算，并在此基础上对系统的可靠度进行了预测。可靠性分析的结果表明：提高系统可靠性的关键环节在于防止动力矩不足和避免卡滞失效问题。

Faulty Tree Analysis of the Deployment System of a Large Satellite Antenna

A study on the deployment reliability of a large satellite antenna with hoop-truss was presented in this paper and the key point was on the movement reliability of the deployment mechanism. To begin with, Firstly the movement principium of the large antenna was studied and the faulty tree of the deployment system was built by using the Faulty Tree Analysis method. Subsequently,the reliability model of the deployment mechanism and the probability calculating formulae of some base affairs were given,and upon which the system reliability was forecasted. The reliability analysis shows that preventing the deployment mechanism from a lack of enough kinetic moments and avoiding the blocking problems are important for improving the system reliability.