Hard real-time fault diagnosis method and system

Abstract

The invention discloses a hard real-time fault diagnosis method and a hard real-time fault diagnosis system and relates to the field of real-time engineering system fault diagnosis. The calculation efficiency for diagnosing the rule is improved by fully using information of a test process. The method disclosed by the invention mainly comprises the steps of performing static optimization on a fault rule in a knowledge base file to generate an optimized knowledge base file; resolving the optimized knowledge base file to generate a dynamic knowledge base; searching the dynamic knowledge base according to acquired fault diagnosis sign data; judging whether the fault diagnosis time is larger than a soft time threshold value during testing and training, if the fault diagnosis time is larger than the soft time threshold value, generating a new rule base file through a fault diagnosis result serving as a second component and a first fault diagnosis component, and storing the new rule base file into the knowledge base file; during arrangement and use, judging whether the fault diagnosis time is larger than a hard time threshold value, if the fault diagnosis time is larger than the hard time threshold value, ending the current fault diagnosis. The embodiment of the invention is mainly used in a hard real-time fault diagnosis process.

Description

technical field [0001] The invention relates to the field of real-time fault diagnosis of engineering systems, in particular to a strong real-time fault diagnosis method and system. Background technique [0002] Safety-critical engineering systems (including aircraft, missiles, satellites, automobiles, nuclear power plants, etc.) are designed using methods such as fault tree analysis to analyze and design the reliability of the system. Faults that occur during operation need to be dealt with in real time. The real-time fault diagnosis expert system is usually an important part of the test system and the fault diagnosis and fault-tolerant control system. Through the fault tree-oriented real-time fault diagnosis expert system, the system fault diagnosis is realized, and the purpose of real-time fault location, isolation and fault-tolerant control is realized. [0003] As the complexity of engineering systems increases, the real-time fault diagnosis expert system needs to obta...

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Problems solved by technology

[0004] When the inventor implemented the real-time fault diagnosis method in the prior art, he found at least the following problems in the prior art: a large number of tests were carried out before the system to be diagnosed was officially deployed and operated, but the information generated by the tests was not fully collected and utilized, and there was no To improve the performance of fault diagnosis, the data accumulation during the test is wasted

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