基于擠壓模式的磁流變液懸置及發(fā)動(dòng)機(jī)隔振控制系統(tǒng)研究.pdf

1、重慶大學(xué)碩士學(xué)位論文基于擠壓模式的磁流變液懸置及發(fā)動(dòng)機(jī)隔振控制系統(tǒng)研究姓名：駱靜申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：儀器科學(xué)與技術(shù)指導(dǎo)教師：廖昌榮201005重慶大學(xué)碩士學(xué)位論文IVABSTRACTEngineisawidelyusedthermalpowermachinerythevibrationofwhichisoneofthemainvibrationsourceofvehicle(carsshipsaircraftetc.).Engine

2、hasawidefrequencymultisourcesmultimainfrequencyvibrationwhenitruns.Itnotonlyaffectnmalwkofequipmentsinstrumentsonthevehiclesbutalsodecreaseridingcomfthaveaseriouseffectonsurroundingenvironmentevencauseseriouspropertylive

3、sdamage.Mountingsystemcanreducetheenergytothelaunchvehicletransmittedfromtheengine.Therubbermounthydraulicmountareusedgenerallyatpresentwhichcannotmeettheisolationrequirementsinawiderfrequencyrange.Sothesemiactivemountba

4、sedmagheologicalfluid(MRF)isstudiedextensively.AfourcylinderinlinedieselengineistakentostudyinthispapermechanicalmodelmageiccircuitdesignofMRFmountisdiscussedtheenginevibrationisolationsystemissimulatedthePIDhumansimulat

5、edintelligentcontrol(HSIC)methodsarestudiedthetestiscarriedoutontheenginevibrationbench.Thespecificwkisasfollowed:①FsmalldisplacementofenginevibrationakindofMRFmountbasedonthemodelofdisksqueezeisdesignedproduced.Naviersl

6、ipconditionboundarycompatibleconditionareestablishedradialvelocityradialpressuredistributionofdifferentlocationunderextrusionarederived.TheinterfacebetweenNewtonianflowareaBinghamflowareaisdeterminedthemathematicalexpres

7、sionofstressbetweentwodiskschangedwiththecurrentwascalculated.TheexperimentaldampingfceisinaccdancewiththetheeticalvalueunderthetestonMTS870Electrohydraulicservoexcitationconsole.②Theexcitingfcetqueofthefourcylinderinlin

8、edieselengineareanalyzed.Sothemainvibrationexcitingsourcesofenginearesecondderreciprocatinginertiafceoverturningmomentthefceoftheincentivesisestimated.AccdingtoLagrangeequationthetwofreedomdegreesdynamicmodelofenginevibr

9、ationisolationsystembasedMRFmount.Influenceoffcetransmissionratebyfrequencyratiodampingisanalyzedtherangeofstiffnessisestimated.③ThedominantideologyofHSICistostudysimulatehumancontrolfunctionsbasedoncontrolstructuremacro