Fault diagnosis method and fault diagnosis system

Abstract

The invention provides a failure diagnosis method and a failure diagnosis system. When determining the similarity between each failure and status information obtained by an apparatus monitor system, the invention not only takes the similarity between each characteristic quantity value in the status information and the relative failure characteristic of each failure into consideration, but also takes the degree of association between each characteristic quantity type and each failure into consideration, wherein, the degree of association is indicative of the sensitivity of distinct characteristic quantity types to distinct failures. Since the degree of association between the characteristic quantity type and the failure can be obtained in accordance with historic failure diagnosis course or with statistics of pre-implemented multiple failure experiments, the obtained degree of association can objectively and accurately reflect the sensitivity of the distinct characteristic quantity types to the distinct failures such that the similarity between the status information and the failure is capable of more accurately giving a reflection of the similarity between the known failure and the failure represented by the status information, therefore the failure diagnosis acquires higher accuracy.

Description

technical field [0001] The invention relates to fault diagnosis technology, in particular to a fault diagnosis method and a fault diagnosis system. Background technique [0002] The existing equipment monitoring system can monitor the status of various equipment, such as various feedback signals and operating parameters of the equipment through sensor measurement, and these data are converted into various characteristic quantities (Characteristic Quantity, CQ). The converted set of at least one characteristic quantity is called status information. Fault diagnosis personnel then judge the current state of the equipment based on their professional knowledge and experience, as well as the characteristic quantities in the state information, that is, judge whether the equipment has a certain type of fault at present, so as to realize fault diagnosis. [0003] However, the above-mentioned fault diagnosis process mainly depends on the experience of the fault diagnosis personnel an...

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Problems solved by technology

[0007] However, the above-mentioned system mainly obtains the fault diagnosis result based on the similarity between the value of the characteristic quantity in the state information and the fault feature, so the basis for fault diagnosis is not comprehensive enough, so that the accuracy of fault diagnosis is not high

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