Models And Methods Of Fault Diagnosis Based On Information Fusion Technology

The fault diagnosis and detection of system is an important methodology to insure the equipment turn over normally. Information fusion is a suitable methodology for fault diagnosis. In this paper, the model and methodology of fault diagnosis with information fusion based on the depiction of the basic principle of information fusion and fault diagnosis and the relationship of them is expounded. In this model, the acquisition , processing and allocation of information , the partial and the all-round diagnosis is included. The wavelet is used in the processing of message; in the allocation of message, the general fuzzy entropy is regard as the evaluation criterion and the correlation analysis is used to the feature selection and allocation; the partial diagnosis is realized by neural network; the evidence theory and fuzzy integral is used to decision in decision fusion net, in this section, this paper give a texture methodology of basic probability and fuzzy integral. Compare with other methodology, this methodology enter upon from the structure of the neuron of capita in theory, so this methodology is closed to the acquaintance course of people. By the fusion of fault symptom, higher accurate and more reliable diagnosis result can be obtain and the lose of information is lesser than others. The evidence theory and fuzzy integral can abate the incertitude and improve the accuracy of decision.The methodology that is given by this paper is used to the fault diagnosis of automobile motor. The result of emulation declaration that the result is according to the matter of factor, which shows this methodology, is workable and correct. This methodology can also be used in others complication system.This paper design a system to diagnose the fault of motor based on the research of theory and discuss the way to achieve the fault diagnosis online. The work that in this paper is the research of basic theory, it must be monitor , modify and integrated if it want to be used in practice.