关键词: 航空发动机;性能参数;故障诊断

Abstract: According to the problem on calculating the synthetic exponent characterizing the whole performance of engine by using the synthetic weighted method, the weights of every parameter are difficult to be determined. To solve this problem, a method of determining the weights of every parameter by genetic algorithm is presented. The synthetic exponent gained by GA is more sensitive and exact than the one gained by the expert investigated method in reflecting the whole performance of the engines. Meanwhile, this method improves the rate of identifying whether the performance of the engine is normal or not, finds the potential forepart fault of engine and prevents the spread of the fault. The validity of the method is testified by monitoring certain type of turbine-fan engine.

Key words: Aircraft engine;Performance monitoring;Fault diagnosis