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。
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.
经案例分析表明，该方法可以比较有效地解决一类带反馈环的故障分析问题，大大提高了功能角色模型的应用范围。
The research results show this method can resolve a type of fault analysis of the feedback system effectively, and the range of applications of the functional role model is extended along with it.
并以飞机发动机燃料计量系统FMEA为例，阐述了功能角色模型的故障注入和故障模式的建立，以及故障分析过程。
Taking FMEA of fuel-metering system of jet plane engine as an example, failure infusing of functional role model, setting-up model of failure, and process of fault analysis was introduced.
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