运载火箭常规燃料调温系统模糊故障树研究  

Fuzzy Fault Tree Analysis on Temperature Control System of Conventional Rocket Propellant

作　　者：陈慧星[1,2] 任艳 俞少行 

机构地区：[1]西昌卫星发射中心,西昌615606 [2]国民核生化重点实验室,北京102205 [3]航天工程指挥部,北京100101

出　　处：《宇航学报》2017年第1期104-108,共5页Journal of Astronautics

摘　　要：应用模糊故障树分析方法对运载火箭常规燃料调温系统的可靠性进行了研究。首先,建立了常规燃料调温系统的故障树模型;其次,基于模糊数学理论,运用上行法求解了故障树的最小割集,提出了以正态型模糊数描述底事件发生概率的表达方式和上层事件模糊集的计算方法;最后,提出了基于模糊概率重要度的故障定位与排查方法。以PLC通讯故障为例进行了计算分析,结果表明,依据模糊概率重要度大小逐次排故的方法,能有效提升故障定位效率。Fuzzy fault tree analysis method is applied to study the reliability of the conventional temperature control system. Firstly, a fault tree model of the conventional rocket propellant temperature control system is established. Secondly, based on the fuzzy mathematics theory, the ascending method is applied to solve the minimum cut set of the fault tree. The expression of the bottom event occurrence probability is described by the normal type fuzzy numbers, and the calculation method of the top event fuzzy sets is put forward. Finally, a fauh location and screening method based on the fuzzy probability importance is provided. The PLC communication faults are calculated and analyzed as an example. The results show that the troubleshooting methods based on the fuzzy probability importance can effectively improve the efficiency of fault location.

关 键 词：调温系统 模糊故障树 最小割集 模糊概率重要度 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]