基于EMD与神经网络的滚动轴承故障诊断方法(3)

Keywords:rollerbearing,EMD,energy,neuralnetwork,faultdiagnosis

STUDYONSIMPLIFIEDADAPTIVEFEEDFORWARDCONTROL

FORVIBRATIONREDUCTIONOFSTRUCTURES

LuMinyue　GuZhongquan　YangTiejun

1

1

2

(1.NationalKeyLaboratoryofRotorcraftAeromechanics,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016;

2.PowerandNuchlearEngineeringCollege,Ha’erbinEngineeringUniversity,erbin150001)

　　Abstract　AfeedforwardadaptivecontrolsystembasedondevelopedandappliedtothecontrolofstructuralvibrationexcitedbyPseudo-peri.-esystemidentificationisrealizedbyRecursiveLeastSquare(RLS)method,while(LMS)algorithm.Incontrolsystem,sys2temidentificationandcontrolarehighsignalprocessingboard.Excitingresultsareobtainedwhenthiscontrolalgorithmisonreductionwithperiodicandpseudo-periodicsignals.

Keywords:,midentification

EXPERIMENTALINVESTIGATIONONTRANSVERSALVIBRATIONOFSTEELSUPPORTINGPOSTOFOVERHEADCATENARYSYSTEMONTHEDECKOFQINSHENPASSENGER

ACCOMMODATIONRAILWAYBRIDGE

LiuHanfu

(RailwayEngineeringResearchInstitute,ChinaAcademyofRailwayScience,Beijing100081)

　　Abstract　InthetransversalvibrationtestofthesteelsupportingpostontheflangeofQinShenRailwaybridge,thepracticaltechniquesofinstrumentselection,theprovisionofstaticeliminaterandthewayofdatasamplingaremainlydiscussed.Itisprovedthatafavorabletestingeffectcanbeobtained.Theregularitiesrelatedtoamplitudechangeoftransversalvibrationofthesteelpostareanalyzed,andtheideaoftransversalvibrationcontrolofthesteelpostaswellasthefutureresearchdirectionareputforward.

Keywords:steelsupportingpostofoverheadcatenarysystem,impactinducedvibration,response,datasampling

ONOBJECT-ORIENTEDSOLVINGMETHODFORPOWER

FLOWOFISOLATIONSYSTEM

FengDezhen　ZhengXiaozhong

1

2

(1.SchoolofMech.Eng.,JinanUniv.JinanCityShandongProvince,Jinan250022;2.SchoolofMech.Eng.,ShangdongUniv.,JinanCity,Shandongprovince,Jinan250061)

　　Abstract　Thesolutionstrategyofcomplexvibrationisolationsystemwhichiscomposedofsingle-layersandmul2tiple-layerscompoundstructureisanalyzedindetail,andthe"depthfirst"structuralmodeling,methodisproposed.Byvirtueofthesolvingstrategyfordepthfirstsystemandthesolvingalgorithm,themethodtoanalysecomplicatedflexi2