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5、ChaiGuangyuan(Signature)ABSTRACTTheseatisaveryimportantpartwhichinfluencescomfortofvehicle.Modernvehicle,especiallyengineeringvehicles,trucks,militaryvehiclesandsoon.Becausetheirsuspensionsystemisworseandtheenvironmentofroadwhichtheyworkatisextremelybad.Vehiclesvibrateseriouslywhenworkingonba
6、droadforalongtime,thusmakesthedriversofthesevehiclessufferfromhighstrengthofthelowfrequencyvibration,whichwillsignificantlyaffecttheirhealth,andreduceworkefficiency.Theseatsuspension,asonepartofdecreasingvibrationofvehicle,iseasytobeimprovedandhasgreatinfluenceonthevibrationperformance,sowere
7、searchseatsuspensionsystem.Improvingvehiclecomfortbychangingseatsuspensionwillbecomeaveryeffectiveway.Thisdissertationwilltakesemi-activesuspensionofseatbasedMRdamperastheresearchobject,discussandresearchthekeytechnologieswhichhelprealizecont