航空发动机故障诊断技术对于保证发动机的可靠性和飞行的安全性、经济行具有重要意义。本文以FJ44型航空发动机为研究对象,采用灰色系统理论对发动机常见故障类型进行分析,通过灰色聚类分析的方法实现发动机常见故障的诊断。实际参数验证表明该方法具有较高的可行性,对FJ44型发动机的故障诊断有一定的参考性。 Aeroengine fault diagnosis technology for ensuring the reliability of the engine and flight safety, economic line is of great significance. In this paper, FJ44 aeroengine is taken as the research object, the common fault type of the engine is analyzed by the gray system theory, and the common fault diagnosis of the engine is realized by the method of gray cluster analysis. The actual parameter verification shows that this method has high feasibility and has certain reference to the fault diagnosis of FJ44 engine.