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A method of oil uncertainty state characterization and fault diagnosis based on multi-index monitoring

A fault diagnosis and multi-index technology, applied in the field of oil condition monitoring, can solve the problems of difficult diagnosis of oil faults and inaccurate results, and achieve the effect of overcoming the inaccurate results of oil condition monitoring.

Active Publication Date: 2022-08-05
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to propose a multi-indicator monitoring oil uncertainty state characterization and fault diagnosis method, which classifies the oil monitoring index data according to different attribute categories, and applies expert knowledge , establish the corresponding inference rule base, and apply the fuzzy inference system FIS method to realize the quantitative representation of the oil state. , overcoming the problems of inaccurate oil state monitoring results and difficult diagnosis of oil faults in traditional oil monitoring methods

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  • A method of oil uncertainty state characterization and fault diagnosis based on multi-index monitoring
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  • A method of oil uncertainty state characterization and fault diagnosis based on multi-index monitoring

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[0060] The present invention will be further described below with reference to the accompanying drawings.

[0061] The indicators of oil state monitoring can be classified into the physical and chemical state of lubricating oil, the state of additives, the state of pollutants and the wear state reflected by the inflow of wear debris generated by component wear into the oil according to the different objects, corresponding to the indicators {x 11 ,x 12 ,…x ij ,…} and property {H 1 ,H 2 ,…,H c …,H N }. like figure 1 As shown, the oil monitoring data is classified, including index layer, attribute layer, and status layer, wherein the index layer is the obtained oil index monitoring data, and the attribute layer includes physical and chemical properties, additive properties, pollutant properties and component wear and tear. The properties of the abrasive particles reflected in the inflow of the wear debris into the oil, the state layer is represented by the value of [0,1] t...

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Abstract

A method for oil uncertainty state representation and fault diagnosis based on multi-index monitoring. By collecting oil data, a linear interpolation method is applied to normalize oil monitoring data in an index layer; a fuzzy evaluation method is applied to the index layer. Evaluate the data of the index layer to the attribute state of the attribute layer; establish a fuzzy rule base according to expert knowledge, and perform fuzzy inference on the attribute state to realize the quantitative characterization of the oil state; according to the set judgment threshold, Diagnose whether there is a fault in the equipment; the present invention has the advantages of overcoming the problems of inaccurate results of oil state monitoring and difficult identification of oil faults in traditional oil monitoring methods through quantitative characterization of oil state.

Description

technical field [0001] The invention belongs to the technical field of oil state monitoring, and particularly relates to a method for characterizing and diagnosing an uncertain state of oil in multi-index monitoring. Background technique [0002] As the "blood" of the equipment transmission system, oil is the core guarantee for lubricating bearing, heat dissipation and cooling of all motion pairs, and plays a decisive role in the power transmission of the equipment and the life of the components. Oil monitoring is to provide equipment status information by monitoring the comprehensive information of the continuous running lubricating oil of the friction system, which is a comprehensive representation of multi-index information. Therefore, it is of great significance to monitor multiple indicators of oil to obtain comprehensive information of oil and to complete fault diagnosis. [0003] There are many kinds of indicators for oil monitoring, including physical and chemical p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06N5/04G06K9/62G06Q10/06
CPCG06N5/048G06Q10/06393G06F18/2415
Inventor 武通海李博潘燕
Owner XI AN JIAOTONG UNIV
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