Abstract: According to the different types and characteristics of satellite fault, a kind of fault diagnosis method is proposed, which integrates multivariate threshold, model-based and fault tree-based method. In order to optimize the fault diagnosis method, it takes the advantages and remedy of a defect with other methods. This can diagnose many kinds of satellite fault occurring in the on-orbit phase rapidly and accurately. Besides, it can analyze the damage degree of the failure and establish the measures to eliminate the failure.

Key words: Combination of several methods, Fault diagnosis