Breakdown maintenance and fault analysis method for complicated equipment

Abstract

The invention discloses a breakdown maintenance and fault analysis method for complicated equipment. The method specifically comprises the following steps: (1) classifying faults into different types according to objects or visual degree; (2) building a knowledge base including a specification base and a history base; (3) configuring the analysis method according to the fault phenomenon; (4) generating 'fault links' and 'fault diagrams'; (5) utilizing fault analysis algorithm to conduct fault analysis according to the divided diagnosis objects; (6) and fusing the causes of various fault analysis algorithms. The fault analysis method provided by the invention is suitable for different fault cases, the 'fault links' are built from the specification base according to the fault phenomenon andthe configuration condition, and a plurality of fault links can form the 'fault diagram' of composite faults; and different fault phenomenon sets are respectively diagnosed and analyzed by adopting different analysis methods according to the configuration condition, so as to obtain the corresponding fault causes and the probability of faults and provide a solution for breakdown diagnosis of important equipment.

Description

technical field [0001] The invention belongs to the field of equipment fault diagnosis and maintenance, and specifically relates to a fault analysis method for complex equipment after-the-fact maintenance occasions, which can organize complex fault knowledge, analyze fault causes, and provide decision-making for on-site maintenance. Background technique [0002] Major and complex equipment has played an increasingly important role, and its downtime will seriously affect the production efficiency of the enterprise and bring huge losses to the enterprise. Therefore, related technologies such as condition monitoring, fault diagnosis, reliability analysis, life prediction, and preventive maintenance have become research hotspots for complex equipment. However, due to many contradictions between high acquisition accuracy requirements and harsh working environment, intensive data integration requirements and low informatization, high cost and low effectiveness, these intelligent d...

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Problems solved by technology

[0003] Few people have studied the fault diagnosis technology in post-event maintenance occasions. Fault tree analysis (FTA) and failure mode and effect analysis (FEMA) are the classic analysis methods. However, major equipment is generally a highly complex equipment that integrates mechanics, electricity, and hydraulics. , its faults are affected by its own design, assembly, environment and operation, etc., and the relationship between faults is intricate. FTA or FMEA can no longer fully express its fault knowledge. In terms of fault analysis, FMEA focuses on fault modes and their hazards The description of degree etc. is difficult to be used for diagnostic reasoning, while FTA focuses on weak link research and is greatly affected by the accuracy of fault tree when used for diagnosis

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