飞机发动机燃料计量系统故障分析的一种方法

随着产品成本和复杂性的提高，故障模式影响分析已成为复杂系统设计过程中不可或缺的部分。但其有效性多年来一直存在争议，其主要原因在于采用以经验为主的定性推理法，分析繁琐，工作量大，导致很难确定每种故障模式的故障影响。本文从BIT设计的角度，以功能角色模型理论为基础，导出在反馈系统中的推理规则和故障模式影响分析方法。最后以喷气式发动机燃料计量系统为例，阐述对该系统进行故障分析的一般步骤。研究表明，本文提出的功能角色模型理论可有效提高故障模式影响分析效率。

Fault Analysis in the Fuel-metering System of Plane Engine

With the increasing of the cost and complexity of products,Failure Modes and Effects Analysis(FMEA) are becoming an indispensable part of the design process of complex systems.However,it isn't effective for complex system due to the qualititative reasoning maily by experiences,which is overloaded with details.It is difficult to ensure the fault effect of each fault modes.In this paper,based on the functional role model theory,the reasoning rule and the technique of FMEA,which are facing to Built in Test(BIT),are developed.The process of fault analysis is illustrated by the Fuel metering System of jet plane engine.The results of research show that the fuctional role model theory can be more efficient and effective in the FMEA.