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1、AbstractThesuspensionsystemwhichistheimportantcomponenttoensurethecontrolstabilityandrideperformanceisthekeystoneofautomobileperformance.Thepassivesuspensionhaslotsoflimitationsforitcanonlyaccepttheroadstimulation.Theactivesuspensionwhichcombinestheadvancedelectroniccontro
2、ltechnologyandtheordinarysuspensionbecomesmoreandmorevalued.Buttherelationshipbetweenactiveforceandthemotionoftheactuatorisalwaysignoredintheactivesuspensionmodelusedinresearchtoday,whichmakesthetolerancefromthefactsystem.Thecontrolstrategybasedonthemoreintegralmodelwillbe
3、researchedinthisthesis.Ahydraulicactuatingcylinderisresearchedaccordingtothehydraulicdesignationtheoryfortheactivesuspension.Thematchingparameterisselectedbytheaimofuseandthematchingprinciple.Throughanalyzingthecharacteristicsandstructuresofproportionalamplifier,proportion
4、alelectro-magnet,slidevalveandhydraulicactuatingcylinder,themathematicalmodelofeachcomponentisbuiltbasedonthefluidandhydraulictheory.Theroadinputmodelisgotthroughmakingthewhitenoisegothroughanintegrator.ThePIDcontrolmodelandLQGcontrolmodelissetupbasedonthetheoryofLQGcontro
5、landPIDcontrol.ThecontrolledaccelerationqualityisadaptedbytheparameterofP,IandDthroughmodelingsimulationofthePIDandLQGcontrol.Thecomprehensiveoptimalcontrolofthecarbodyacceleration,thesuspensiondynamicdeflectionandthetyrodynamicdisplacementcanbegetthroughdesigningthediffer
6、entweightedmatrixandturntheinfluenceextentbythethreecontrolvariable.ThePIDcontrolmodelandLQGcontrolmodelcombinedwiththehydraulicparameteraremorecompletely,whichhaspracticalguidingsignificancetoimprovethecontrolstabilityandrideperformance.Keywords:activesuspension,PIDcontro
7、l,LQGcontrol,hydraulicsystemmodel,simulationii目錄第一章緒論...........................................................................................................................11.1汽車(chē)懸架概述.......................................................................................
8、.........................11.2主動(dòng)懸架研究的背景和意義................................................
