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1、‘1一‘j東北大學(xué)碩士學(xué)位論文AbstractTheStudyonOptimalDesignandFuzzyControlofActiveSuspensioninVehiclesAbstractInthevehicleengineering，thesuspensionsystemisthekeycomponenttoimprovetheridingcomfortandhandlingstability．Currently,whatiswidelyusedinvehicleispassivesuspension．The依eddampparameterinpass
2、ivesuspensionCan’tadjustitselftoaccordwiththecomplexdrivingconditions．ButtheactivesuspensionCandothat．ItcarladjustthecontrolforceintimeandexactlySOastomakethesuspensionatisbeststatus．So，theanalysisofsuspensionhasimportantsignificancetothedesignandresearchofvehiclesBasedonthevirtualp
3、attemmachineryandadvancedcontroltechnique，Inthisdissertation,thedynamicanalysissoftwareADAMSandtheMAn．AB／Simulik’whichpossessedpowerfulfuzzylogicfunctionwereusedasourstudytoolstocarryontheoptimaldesignandvibrationanalysisoftheIndependentMacphersonsuspension．First，throughtheanalysiso
4、fthestructureofsuspensionandtherelativelocationofallpartsinsuspensionandcoordinateofsuspensioninthevehicle，thedynamicmodelofthesuspensioninADAMS／CarWasbuilt．Then,、析tllthesimulatedroadsignal．thechangesofthelocationparametersofsuspensionweresutdied，andtheseparameterswereusedasOurtarge
5、tvariablestooptimizethesuspensionmodelinADAMS／Insight．Bycomparison，theoptimalsolutionofthesuspensionsystemWasgot,whichwillofferareferencetothedesignofphysicalpatternmachinery．Second，duringthewholedesignprocess，thecontrolmethodisthekeyfactortothecontroleffect．Bycomparingtheperformanc
6、eofallkindsofcontrolmethodsandconsideringthenon-linearfactorofthevehicles，thefuzzycontrolmethodwhichdoesn’tneedtheexactlymathematicmodelWasdecidedtouse．Next,throughmakinguseofthecontrolboxinMATLAB／Simulink,thecontrollerWascreatedaccordingtothecontrolruleswhichcouldchangetheactivefor
7、cetoreducetheverticalacceleration．Co·simulationnotonlyexertthedynamicmodelingandsolutionadvantage，butalsomakegooduseoftheadvancedcontrolfunctionofMATLAB．Also，itcouldmakethemechanicaldesignsystemandcontroldesignsystemsharethesamemodelofsuspension．Bycomparison,wecouldseefuzzycontrolme
8、thod，thisnewcontrol
