Considering low accuracy problem of fault diagnosis for aircraft engine by gray relational analysis

the method of cloud relational analysis was proposed by integrating the cloud theory and the relational analysis.The characteristics of “cloud droplets” reflect fuzziness and randomicity of the mapping

and solve the problem in data mining while representing the distribution change of the integral “shape”.The comprehensive subjection method could mine information fully

then the cloud relation can be calculated.In order to diagnose the single fault for the sensors and components of aircraft engine

a fault diagnosis system based on cloud relational analysis was designed based on analysis of the fault characteristics of the sensors and the components.The simulation results show that the proposed method can not only distinguish the faults of sensors and components

but also locate the fault position of the sensors or the components.The methods can effectively improve the fault diagnosis ability for aircraft engine.