机床主动磁悬浮支承进给平台系统的动力学研究

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1、上海大学硕士学位论文机床主动磁悬浮支承进给平台系统的动力学研究姓名：吴剑锋申请学位级别：硕士专业：机械设计及理论指导教师：张钢20040201圭塑查堂堡主堡苎垒!壁竺!AbstractThisthesisderivesfromtheNationaI863Hi．techResearch＆DevelopmentProject：ActiveMagneticSuspensioninTopGraceNCMachineT001．MagneticsuspensionisUnewkindofsuspensiontechnology．Magneticbearingandmaglevaret

2、hepracticalapplicationofmagnetictechnologyinindustry．Becauseofitsuniquecharacteristicssuchasnon-friction,needlessoflubrication，andhighprecision，researchershavebeendoingwiderandfurtherresearchonmagnetictechnology．Particularly,inhigh-speedmachining，high·speedprincipalaxisandquickfeedingsyst

3、emaretwokeytechnologiestorealizehigh—speedmachining．Howtoutilizemagnetictechnologytoimprovemachiningspeedandprecisionisaquestiontobesolved．Inthethesis，withtheresearchobjectofMag-Levfeedingstagefurmachinetool，asystematicschemeisproposedandatestsamplemachineisdesignedandmade．Meanwhile，inthe

4、thesis，dynamicperformanceofMag-Levfeedingstageformachinetoo]isresearched，andcriticalfrequencycharacteristicsofthesystemanditscorrespondingvibrantmodeareanalyzed．Therefore，thisthesisprovidesatheoreticalbasisforpracticalapplication．Atfirst，thethesisanalyzestheStroctUre，operationalprinciple，

5、stiffness，anddampofsingle-degree—of-freedommagneticsuspensionsystem．ThenamathematicalmodeloffivedegreeoffreedomMag-Levfeedingstageissetupaccordingtovibrantcharacteristicsoflinearguideformachinet001．Next，thethesis,basedontraditionaldynamicstheoryandcombinedwithmagneticsuspensioncharacteris

6、tics，analyzesdynamicperformanceofelectromechanicalcouplinginMag-Levfeedingstageformachinet001．Thisanalysisfocusesonvibrantfkquency，correspondingvibrantmodeoftheMag-Levfeedingstageandtheinfluenceofcontroller'selectricparameteronsystematicdynamicperformancewhenitisworkingunderidealworkingst

7、ate．Moreove‘theoreticalarithmeticisdoneonresearchingMag-Levfeedingstageformachinetoolaccordingtodifferentelectricparameters．Finally,thethesispresentsadesignprojeetofMag-Levfeedingstageformachinetool，inwhich，themainproblemssuch∞radialbearing，orientbearing，andthestruc