In order to solve the aviation equipment fault prediction program,based on the analysis of the basic GM(1,1)model,the weakening operator is introduced to improve the fault prediction model.As an application example,a helicopter oil temperature control box's peak voltage data has been analyse by the improved fault prediction model.The results show that the improved model of grey weakening operator can reduce the fault prediction error and improve the prediction accuracy.Also the paper give two combi-natorial algorithms,one is the weakening operator combined with the the average change rate of the se-quence,the other is the weakening operator combined with the metabolism model,all of them proved the weakening operator can improve the prediction accuracy.It has important reference value for improving the fault prediction and maintenance support ability of aviation equipment.
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