Engineering machinery hydraulic cylinder fault diagnosis system and fault sample signal acquisition method applicable to same

Abstract

The invention relates to an engineering machinery hydraulic cylinder fault diagnosis system and a fault sample signal acquisition method applicable to the engineering machinery hydraulic cylinder fault diagnosis system. The system comprises a feature parameter extraction module, a database module, a human-computer interaction module and a classifier module, wherein the feature parameter extraction module is used for extracting fault feature parameters and checking the similarity; the database module is used for storing sample data and temporary data; the classifier module is used for designing a classifier and classifying unknown fault signals; the human-computer interaction module is used for completing related query display functions according to user input. The fault sample signal acquisition method is used for carrying out hierarchical simulation tests on fault tree bottom events on a hydraulic cylinder type test bed and acquiring fault sample signals and test bed status signals. The engineering machinery hydraulic cylinder fault diagnosis system and the fault sample signal acquisition method have the advantages that the system is high in fault diagnosis precision, fault causes and fault levels can be diagnosed, and the acquired fault sample signals have few impurities and facilitate extraction of the feature parameters.

Description

technical field [0001] The invention belongs to the intersecting fields of computer software technology, signal analysis and processing technology and fault diagnosis technology, and relates to a hydraulic cylinder fault diagnosis system and a fault sample signal acquisition method applicable thereto, in particular to a construction machinery hydraulic cylinder fault diagnosis system And the fault sample signal acquisition method applicable thereto. Background technique [0002] The hydraulic cylinder is a hydraulic critical part composed of multiple components, with various failure phenomena and complex mechanisms, showing the characteristics of comprehensiveness and complexity. There are many reasons for a macroscopic failure phenomenon of hydraulic cylinders. For example, the failure of the hydraulic cylinder may be caused by internal leakage of the hydraulic cylinder, excessive external load, tension inside the hydraulic cylinder, failure of the cushioning effect, and h...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fault diagnosis system for construction machinery hydraulic cylinders and a fault sample signal acquisition method that cooperates with it to overcome the low accuracy of fault diagnosis, the fault sample signal has many impurities and it is difficult to separate and extract fault characteristic parameters, and it is difficult to diagnose simultaneously Insufficient failure reasons and failure levels, etc.

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