基于系统功能-结构-故障模型的[WTHZ]FMMEA[WTBZ]分析方法

针对传统故障模式及影响分析（failure mode and effects analysis，简称FMEA）不能识别装备或零部件的故障机理，其故障原因分析、故障影响推理及潜在故障模式识别能力较弱，故障信息描述不规范等导致的分析效率低、可信度差、分析结果重复使用性差等问题，提出一种新的故障机理、模式及影响分析（failure mode, mechanism and effects analysis，简称FMMEA）方法。首先，根据系统结构、功能及其内部物质流、能量流、信号流、部件故障等信息建立系统的功能-结构-故障模型；其次，采用模糊认知图推理分析各故障模式的传播途径及影响，得到规范化的故障模式及影响分析表格，可为系统的可靠性、测试性设计与分析提供基础数据；最后，以某燃油供给系统为例进行了FMMEA分析，验证了该方法的可行性和有效性。

A FMMEA Analysis Method Based on Function-StructureFailure Model

A novel method combining failure modes, mechanisms, and effects analysis (FMMEA) is presented, because traditional failure mode and effect analysis (FMEA) methods cannot identify failure mechanisms and are weak at analyzing failure causes, identifying potential failure modes, and reasoning failure effects. First, a function-structure-failure model is created in accordance with the system structure, function, internal material flow, energy flow, signal flow and failure information. Then, the failure mode propagated tables are obtained using fuzzy cognitive map (FCM) theory. A standard and regular FMMEA table is obtained as a good base for further system reliability and testability design and analysis. Finally, a fuel distribution system (FDS) is analyzed to verify the feasibility and effectiveness of the proposed method.