Fault Analysis of Machine Tools Based on Grey Relational Analysis and Main Factor Analysis

In order to realize the recognition of key subsystems of NC machine tools under fault-related conditions, a method of factor association analysis based on integrated grey relational analysis and principal factor analysis was proposed. According to the subsystem failure time series, the correlation of the failure process between the various subsystems of the machine tool is evaluated by the grey correlation degree calculation. In combination with the principal factor analysis method, the subsystem characteristic values are calculated and the key machine subsystems are determined accordingly. This method provides the basis for subsequent reliability improvement. Finally, a domestic CNC machine tool is used as an example to verify the effectiveness of the method.