不维修系统功能状态可靠性研究  

Reliability Study on the FunctionState of the NonRepairable Systems

作　　者：孙有朝[1,2] 施军[1,2] 贺斌[1,2] 

机构地区：[1]南京航空航天大学飞行器系 [2]南京航空航天大学无人机研究所

出　　处：《南京航空航天大学学报》1998年第2期194-199,共6页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：不维修系统指的是在任务期间发生故障时不采取维修活动的那些系统，飞机整体及其各功能系统可视为不维修系统。本文从组成系统各单元故障模式发生的概率出发，详细研究了基于故障模式影响后果的系统功能状态的可靠性问题，给出了求解不维修系统各功能状态概率的一般方法，提出了适用于多态功能系统分析的拟割集法，说明了拟割集的求解步骤，提出了不完全故障树的概念，说明了不完全故障树与传统的二态故障树的区别；引入模糊集理论，建立了考虑各功能状态影响的可靠性综合评估模型。文中提出的方法适用于多态系统或功能退化系统的可靠性分析与研究。Nonrepairable systems are defined as the systems which can not be repaired during operation, an aircraft and its function systems are nonrepairable systems. Basing on the fault modes of subsystems and elements, advanced the calculating methods of the probability of the function states, this paper proposes the concept of semicut set and nonfull fault tree, gives the process of obtaining semicut set, discusses the difference of the nonfull fault tree and the traditional twostate fault tree, applying for the theory of fuzzy set, and established the composite evaluating model of system reliability concerning with function states. This method is suitable for the reliability analysis of more state system or function reduce system. Proved by the practice application, the calculation results obtained by use of the formulae can really reflect the system reliability level.

关 键 词：功能分析 故障模式 故障树 可靠性 不维修系统 

分 类 号：TB114.3[理学—概率论与数理统计]