Fault Assessment of Hydraulic System Based on Gaussian Mixture Model

Based on the civil aircraft hydraulic system, the typical slow-change fault injection is carried out in hydraulic system MWorks model, and the fault state assessment technology based on Gaussian mixture model is studied. The results show that the health curve of the Gaussian mixture model can truly reflect the system pressure abnormal deviation process, and the health confidence value obtained by the inverse tangent function normalization is more sensitive to the early failure process of the fault, which can better support the predictive maintenance.