汽车悬架系统的振动特性分析与半主动控制方法研究

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1、天津大学硕士学位论文汽车悬架系统的振动特性分析与半主动控制方法研究姓名：叶智超申请学位级别：硕士专业：振动与控制指导教师：贾启芬20070601ABSTRACTAtpresent，semi．activecontrolsuspensionsystemshavereceivedagreatdealofattentioninacademeandindustrialcirclestoimproveridecomfortandroadholdingandhandingstability．Thedamperw

2、ithdynamicallyvariabledampingpropertieslSoneofthekeyelementsforsemi．activesuspensionsystems．Magneto·rheologicalfluiddampershaverecentlyemergedasenablingtechnologyforimplrmentingsemi．activecontrolinvarietyofapplicationbecauseoftheirmechanicalsimplicity

3、,lowoperatingpowerrequirements，environmentalrobustness，anddemonstratedpotentialfordevelopingforcessufficientforapplications．Inthedissertation，astate．of-the．artsemi．activecontrolsuspensionsysteminwhichtheMRdampersareused雒thesemi．activecontrolactuatorsh

4、aSbeenproposedanddeveloped．Thetheoreticallyanalyticalandsimulationareconductedtocharacterizethedynamicalperformanceandtodevelopthesemi．activecontroltechnologyoftheMRdampingsemi．activesuspensionsystem．ThemainpartsincludedinthethesisareaSfollow：1．Arevie

5、wofthenonlineardynamicmodelingandsemi—acWecontrolofthevehiclesuspensionsystemsbasedonMRathomeandabroadWaSgiven，itpointsoutthathighdotsmodelingandminglecontrolmethodalecurrentorientationandtrend．2．Introducemanyparametermodelsofmagnetorheologicaldampers

6、，throughanalyzingSigmoidmodelusedinthetextnumerically,itrevealstheinfluenceoftheparameterstodamperpowerofmagnetorheologicaldamper．3．Bysineexcitement,theequationsof2一dofs—suspension—systemweresolvedbytheequilibrationtheory,thatwerevalidatedbynurnercalc

7、alculation。DynamicalcharactersintimeandfrequentyieldandtheinfluenceoftheSigmoidmodel’Sparameterswereanyzingwiththesuspension．Theinfluenceofthemajorstandardofthesuspensionsystem’scapabilitywasalsoanalyzingwiththesubmitpowerthatcanbecontrolled．ThebaSict

8、heoryofthecontrolsystemdesignwassuppliedowingtotheanalyseofnonlinearvibrationmechanisminthesemi-activesuspensionsystems．4．Buildingasemi．activenonlinear8-dofsintegritysuspensionsystemmodel，whichsimulatingtherunontheroadrealitilyandthe也eridecomf