汽車(chē)半主動(dòng)懸架系統(tǒng)的建模研究.pdf

1、重慶大學(xué)碩士學(xué)位論文汽車(chē)半主動(dòng)懸架系統(tǒng)的建模研究姓名：朱明申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：車(chē)輛工程指導(dǎo)教師：鄧兆祥20040420英文摘要ABSTRACTBasedononehomemademiIli—carthispaperresearchesthemethodgettingthedynamicsparametersofacar，andthewayestablishingthedynamicsmodelMoreover，飯spaperdesi

2、gnsthesemi—activesuspensionsystembasedonmagnelorheological(MR)fluiddamperandsimulatesitaccordingtoLinear—Quadratic(LQ)optimaIcontroltheoryThefollowingfoursubjectsaremainlystudiedAdoptingthreemethodstogetthedynamicsparame

3、tersofacarTherearetest，3DmodelingandreferringtodrawingsrespectivelyInthetestmethod，aspecialdoublespringinverted—pendulumtestrigisdesigned，whichisusedtotesttheseparametersofengine，doorsandseats；Usingthe3DmodelsofCarbody，f

4、rontaxleandrearaxletogettheirparameters；Accordingtothetestreport，gettingthedampingandstiffnessofsuspensionandthestiffnessoftyresThenobtainingthewholeCardynamicsparametersbasedonmasscentercoordinatesformulaofspaceforcesys

5、temandtorquetranslationtheoremFinally，respectivelyformingdifferentdynamicsparameterstablesaccordingtodifferentdegreeoffreedom(DOF)modelsStudyOIlthetheoreticmodelingandexperimentalmodelingaboutMRfluiddamperInthispaper，MRf

6、luiddamperworkmodeismixedmodeBasedontherheologyanalysisaboutparallel—platemodel，thedampingforcetheoreticmodelofMRfluiddamperisbroughtforwardBasedonBinghamplasticitymodel，thedampingforceexperimentalmodelofMRfluiddamperisp

7、utforwardTakingsubsectionnonlinearregresstofittestdataunderlowandhighspeedTheresultshowsthatthesimulationmodelCanreflecttheforce—displacementandforce—velocitycharacteristicwellFurthermore，analyzingthetimeflagphenomenaofM

8、Rfluiddamper，andgettingtheconclusionthatitresultsfromthetransientstateresponseofLRckcuitandtheresponsetimeCanbedecreasedbyusingthecurrentdriverUsingLagrangemethodtOconstruct2，4，and7DOFautomobilesemi‘a(chǎn)ctivesuspensionsyste

9、mbasedonMRfluiddamperOnthebasisofit，writingoutthestateequationandoutputequationaccordingtostatespacemethodMoreover，analyzingtheinherentcharacteristicsaccordingtodifferentDOFmodelsAtthesametime，theroadtestiscarriedthrough