基于小波循環(huán)自相關(guān)分析方法的滾動(dòng)軸承振動(dòng)信號(hào)處理技術(shù)的研究.pdf

1、中南大學(xué)碩士學(xué)位論文基于小波循環(huán)自相關(guān)分析方法的滾動(dòng)軸承振動(dòng)信號(hào)處理技術(shù)的研究姓名：李昊申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：陽(yáng)春華20050510碩士畢業(yè)論文摘要ABSTRACTRollingelementbearingisoneofthemostwidelyusedcomponentsiIlalmostallldndsofmacIlinery，wllichdirectlyi11nuencesonwo越ngsafet)rof

2、machine巧inindustryBasedonanalyzing也emlliIlgelemembe撕ng丘equencyspec衄mcharacteristic，Sincesymme仃yorapproxiIIlatelysymme仃yofworkingp眥sofabearingaIlditsuIliquelyperiodicalrotatingwo越r瑪mode，vi刪onofades仃oyedbea血lggenemllye)(1l

3、ibitss仃ongp嘶odici哆Tlleseperiodicalpulsesb血g鋤plitudemodulation(AM)characteristicConsideringtlleabovere2Lsons，anewsi印alprocess協(xié)gmetllodforbe痂gconditionmoIlitoringisstudiedi11mist11esisAMvibrationsi印alofmllingelemembearing’

4、scyclostation碰哆mechaIlismisdiscussedIthaSbeenprovedtIieoreticallytllattllesi印aleXhibi乜fi阱ordercyclostati∞舭時(shí)mconclusion麗llbeuse矗llatprocessiI唱鋤plitudemodlllationvibrationForacycloStationarysignal，itScycloergodic毋ensures廿l

5、ecorrelationfora11alyzingasinglemeasureddata111edi伍cul移ofsi印alpmcess噸wouldbereducedgreatlyCyclostation撕哆isakilldofillllerentpr叩er哆forabe撕ng，Ⅵ，hichcomes丘Dmitsphysicalcon69umtionaIldworkingInodeSocyclicstatisticsmeorywould

6、beabletoidenti母廿ulycond“ionofabearingAnewconclllsionis砷∞ducedmatcyclicautocorrelation‰ctionpossessesdemodulationcapabili夠Comp耐ng謝t11envelopedemodulation協(xié)chnique，“isproved廿latmet曷omemodshaveasiIllilarperfbmanceonex時(shí)actiIl

7、gfeatLlre自equenciesofabearingHo、^，everme鉚omemodsalsohaveessentialdifferenceBasedonstudyiIlgt11enoiseeliIn【i11ationabil塒ofwavelet咖sfom，aa11alyticmetllodofwaveletcyclicautoconelation如nctionissetupThesimulationprovesⅡlisnle