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1、某轿车动力装置参数的匹配设计英文翻译毕业论文1.IntroductionAutomaticandcontinuouslyvariabletransmissionsystemshavebeenexpandingtheirpresenceinpassengervehiclesinrecentyears,whichhasnaturallypromptedactiveresearchonvehiclepowertransmissioncontrolsystems.Themaintopicsincludeshiftcontrol
2、algorithm(Shin,Hahn,Yi,&Lee,2000a;Zheng,Srinivasan,&Rizzoni,1999;Shin,Hahn,&Lee,2000b),feedbackcontroloftorqueconverterclutchslipsystems(Jauch,1999;Hibino,Osawa,Yamada,Kono,&Tanaka,1996;Hahn&Lee,2000),newhydrauliccircuitsforcontrolperformanceenhancement(Jung,Cho
3、,&Lee,2000),etc.Despitetheextensiveresearcheffortoncontrolalgorithms,itappearsthatthepressureinformationofahydraulicactuatorhasnotbeenfullyutilizedinvehiclepowertransmissioncontrol,largelyduetothehighcostofapressuresensor.Asaresult,mostpracticalcontrollershavebe
4、enlargelybuiltuponthemechanicalsubsystemonly,whileneglectingthedynamicsofahydraulicactuator.Insteadofdirectlymeasuringthepressureoutputofahydraulicactuator,thispaperproposesanindirectalternativetoestimatethepressureoutput:anobserver-basedapproach.Themainthrustof
5、thispaperisthatthepressureoutputofahydraulicactuatoris‘observable’withtheslipvelocitymeasurementofthemechanicalsubsysteminavehiclepowertransmissioncontrolsystem.Inadditiontothereadilyavailableslipvelocitymeasurement,theobserverdesignrequiresthemodelsofhydraulica
6、ndmechanicalsubsystemswhoseaccuracydirectlyimpactstheobserverperformance.Themechanicalsubsystemisphysicallymodeledwithrelativeease.Thecomplexityofthehydraulicactuatordynamicsdoesnotallowaphysicalmodelamenabletoobserverdesign.Instead,systemidentificationyieldsasi
7、mplifiedempiricalmodelofthehydraulicactuator.Actualobserverdesignfocusesonguaranteeingrobuststabilityagainstparametricvariationsandtorqueestimationerrorsthatareboundtooccurinamechanicalpowertransmissioncontrolsystem.Hardware-in-the-loopsimulationstudiesareconduc
8、tedtoexaminetheperformanceoftherobustobserver-basedestimatorforthehydraulicactuatorpressure,whichshowstheviabilityoftheproposed38approach.Theoutcomeisarobustpressuree
