Research on reliability modeling of CNC equipment subsystem

In order to reduce the reliability modeling error of CNC equipment, It is proposed in the paper that when a fault occurs in one subsystem, the fault data of other subsystems can be processed as truncated data. The fault sequence can be corrected by means of the average rank method, then the parameters of the model can be estimated and the fitting test can be performed. Finally,taking a series of machining center as an example, the validity of this method is verified by modeling the subsystem.