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Research on equipment reliability evaluation method based on information fusion

In engineering practice, during the gradual development of many equipment from normal state to fault state, they have to experience the three-level working state of "safety state - potential failure - functional failure". From the external performance of potential failure, the first is that the symptom is weak, non-stationary, and does not cause substantial damage to the system. The detected data is zero-failure data, Therefore, the characteristic information of potential failure is relatively small, which belongs to typical small sample information; Secondly, due to the lack of accurate judgment and health analysis of equipment working state, the unnecessary maintenance may aggravate the evolution speed from potential failure to failure; Third, when the equipment operates under overload or harsh conditions, it will promote the deterioration of potential failure to a certain extent. Aiming at the difficulty of reliability evaluation of multi state system, a reliability method based on information fusion is proposed by making rational use of prior information, which provides a technical way for equipment reliability evaluation.