On-orbit health state evaluation method for satellite control moment gyroscope

The invention discloses an in-orbit health state assessment method for a satellite control moment gyroscope, which comprises the following steps of: selecting in-orbit data of a single machine to be assessed as ideal data, extracting six elements of the control moment gyroscope, calculating an expected value and a standard deviation of each element, and obtaining a normalized weight vector by using a variable coefficient method; establishing a relative deviation matrix according to the six elements and the ideal reference vector; and multiplying the weight vector by the relative deviation matrix to obtain an evaluation vector. According to the method, the known on-orbit data is adopted for analysis and statistics, the internal interdependence relationship among the multi-dimensional data in the stable and ideal operation state is found, so that the abnormal trend is pre-judged, the limitation of manual evaluation is eliminated, potential abnormities are found and processed in time, the current technical blank