A neural network is trained and tested by the vibration power spectrum of the hydraulic pump and the results show the validity of the neural network diagnosis.

This model has a certain guidance meaning for realization of the intelligent monitoring and diagnosis system, is helpful to build an integrated, intelligent, automation and network diagnosis system.

Finally, taking ADRT as the application object, using the integrated inference technology of rule diagnosis and Bayesian Network diagnosis methods, we develop the intelligent fault diagnosis system.