参数自适应FMD在轴承早期故障诊断中的应用

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中图分类号：TH17 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202309004

Abstract：To solvetheproblemthattheearlyweak faultdiagnosiseffectbasedonfeaturemodedecomposition（FMD）is suscepti ble to the filter length L ，frequency band segment K and mode decomposition number n ，a diagnostic method is proposed in which ageneticalgorithmisused tooptimizethepreseparametersofFMD，andthekurtosis，envelopeentropyand modifiedadaptiveenvelopespectrumcharacteristicenergyratioasthecomprehensiveobjectivefunction.The methoduses geneticalgorithmtoompare thecomprehensiveobjective functionvaluesofeachcomponentsignaldecomposed byFMDunderdiferent presetparameters，and selects L ， K and n corresponding to the maximum value as the preset parameters of FMD.The bearing fault type is determined by thenvelope spectrumcharacteristicsofthesignal processed byFMD.Theopenbearing faultdataof WesternReserve University and UniversityofCincinnatishowthatthis method has goodantinoise abilityand efective earlyfaultdiagnosis ability.

Keywords：roling bearing；early weak fault；featuremode decomposition（FMD）；genetic algorithm

随着制造业技术的不断发展，机械设备的复杂程度日趋提升，这对机械设备的安全性和可靠性也提出了更高的要求。（剩余16290字）