Application of hydraulic system in condition measurement and fault diagnose based on of information fusion

A method for fault diagnoses of hydraulic system for construction machinery and equipment based on the information fusion logic theory is put forward. The theory of the method is described. It can get the data of hydraulic system for construction machinery and equipment by various type sensors. The model of hydraulic system for construction machinery and equipment condition measurement and fault diagnoses is set up by using the state data as learning samples. And the hydraulic system for construction machinery and equipment state is identified by the model. The results after tested show that this method has the advantages that various tested information of fault symptoms can be made full use of to diagnose accurately faults of the hydraulic system for construction machinery and equipment. It can improve the veracity for diagnose the fault of hydraulic system.