磁流变阀控制应用程序的设计

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1、发展和绩效评价的一个了磁流变阀控制应用程序的设计JariT.Kostamo工程设计与生产部门托大学医学院的科学和技术Espoo,02150FinlandEmail:jari.kostamo@tkk.fiEsaP.KostamoDepartmentofEngineeringDesignandProductionAaltoUniversitySchoolofScienceandTechnologyEspoo,02150FinlandEmail:esa.kostamo@tkk.fiJyrkiT.KajasteDepartmentofEngineeringDesi

2、gnandProductionAaltoUniversitySchoolofScienceandTechnologyEspoo,02150FinlandEmail:jyrki.kajaste@tkk.fiMattiT.PietolaDepartmentofEngineeringDesignandProductionAaltoUniversitySchoolofScienceandTechnologyEspoo,02150FinlandEmail:matti.pietola@tkk.fiABSTRACTMagnetorheologicalfluidsareof

3、tenproposedforapplica-tionsrequiringfastresponseandgoodcontrollabilitybutthedy-namiccharacteristicsoftheMRdevicesareseldomanalyzedindetail.Theaimofthisstudyistopresentamagnetorheologicalvalveoptimizedforfastdynamicalresponse.ThefundamentaldesigncriteriaforfastMRvalvesarediscusse

4、dandanexperi-mentalvalvedesignedforhighfrequencyactuationisanalyzed.ItisshowntheperformancefiguresgenerallyreportedforMRtechnologycanbesignificantlyimproved.Theresultsshowasteppressuredifferenceof7MPacanbecontrolledwithare-sponsetimeof0.7ms.Themaximumrateofchangeforcon-trollablepr

5、essurewasmeasuredtoachieve20.2MPainonemil-lisecond.INTRODUCTIONMagnetorheological(MR)fluidsbelongtothegroupofsmartmaterialswhoserheologicalpropertiescanbevariedbyinducingamagneticfieldtothefluid.MRfluidshaveprovenasapromisingtechnologyforsemiactivedampersandapplicationsinmotioncontr

6、olsystemshavebeenresearched.TheresponsetimeofmagnetorheologicaltechnologyiscommonlyconsideredfastandtheimportanceofgooddynamicpropertiesofMRde-vicesareemphasizedinvibrationcontrolapplications.[1–3]MRfluidsconsistofmagneticallysoftironparticlesmixedintocarrierfluidwhichcanbemineral

7、oil,forexample.Uponapplicationofamagneticfieldtheironparticlesformcolumnarstructuresalongthefieldlines.Theorientationandthemag-neticforcesbetweentheparticlescauseanincreasedapparentyieldstresstotheMRfluidandthefluidflowisresistedorre-stricted[4,5].Duetothiseffectauniquepropertytoacti

8、vefluidstechnologyisthatcontrollablevalvescanbei