A fault diagnosis optimization method based on fault propagation analysis

Abstract

The invention discloses a fault diagnosis optimization method based on fault propagation analysis, and relates to the technical field of fault diagnosis methods. The method comprises the following steps of obtaining an initial state fuzzy set of a diagnosed optimization system before testing; performing an optimization test on the initial state fuzzy set; judging whether the test is passed or not,inferring a possible diagnosis conclusion Xjp if the test is passed, and inferring a possible diagnosis conclusion Xjf if the test is not passed; judging whether the diagnosis conclusion Xjp and thediagnosis conclusion Xjf meet isolation requirements or not, outputting the diagnosis conclusion if the isolation requirements are met, judging whether a candidate fuzzy set exists or not if the isolation requirements are not met, and repeating the steps to test the candidate fuzzy set if the candidate fuzzy set exists; and outputting a diagnosis conclusion if the candidate fuzzy set does not exist. According to the method, the fault diagnosis method can be optimized, so that the time and the cost required by fault diagnosis are relatively lower.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis methods, in particular to a fault diagnosis optimization method based on fault propagation analysis. Background technique [0002] Diagnosis strategy optimization mainly includes test item selection and diagnosis process optimization. Its ultimate goal is to achieve accurate and rapid detection and isolation of product failures, and provide decision support for the implementation of maintenance support work. The main basis of diagnosis strategy optimization is the correlation relationship between product faults and test items, which is closely connected with the internal fault propagation path of the product. The fault diagnosis method in the prior art generally does not optimize the fault diagnosis strategy, so the time and cost required for the fault diagnosis are relatively high. Contents of the invention [0003] The technical problem to be solved by the present invention is how to ...

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Problems solved by technology

The fault diagnosis methods in the prior art generally do not optimize the fault diagnosis strategy, so the time and cost required for fault diagnosis are relatively high

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