汽车变速箱嵌入式诊断系统设计与实现

:2007-10-31:(1978),,,,,:(E-mail:[e-mail]);(1940),,,,:,():1003-6199(2008)01-0021-041,2,1(1.,410083;2.,410205):,,,,,:;;;(SVM):TP311.5:ADesignandImplementonEmbeddedFaultDiagnosisSystemforMotorcarGearboxQINXiao2qun1,2,CHENSong2qiao1(1.CollegeofInformationScienceandEngineering,CentralSouthUniversity,Changsha410083,China;2.HunancollegeofInternationalEconomics,Changsha410205,China)Abstract:Theembeddedtechnology,asakindofon-linefaultdiagnosisimplementmethod,hasbeenpaidmoreattentionstotheapplicationbymanyexpertsandscholars.Inthispaper,designedafaultdiagnosissystemforautomobilegear-boxbasedonembeddedtechnologyandfaultdiagnosistechnology.Thedesignofthehardwareandthesoftwareoftheembeddeddiagnosissys2temforautomobilegear-boxwerestudied,afaultrecognitionmethodbasedonmultisupportvectormachine(SVM)isputfor2ward,andtherelatedtechnologiesandmethodsarestudieddeeply.Somerelatedmeansandapproachestosolvetheproblemoffaultdiagnosisforautomobilegear-boxisdescribedindetailinthispaper.Keywords:automobilegear-box;embeddedtechnology;faultdiagnosis;SupportVectorMachine(SVM)1,,;;,,,,,,,,2211[1-4],27120083ComputingTechnologyandAutomationVol127,No11Mar.2008,,,,,,212::,,,,,,,,(),,,,,,,,,,,,3,:,,,,,,,,,,4,,,,411SVM[5]:41111SVM,,,,K,x,zX,K(x,z)={(x)(z)},XF,,,,mxW()=li=1i-12li,j=1ijyiyjK(xi,xj)(1):i0,i=1,2,,l,li=1yii=0sgn(f(x)),f(x)=li=1iyiK(xi,x)+b=0(2)K(x,xi),:2220083=(isvi)-1/2(3)SVM,(,),,SVM41112SVM[6]minf(w)=12w2=12(ww)(4):yi[(wxi)+b]-10(5),(4)i0,,:min(ww)+Cli=12i(6):yi{(wxi)+b}1-i,i=1,2,,l(w,)=12w2+Cni=1i,,,C0,,:mxW()=li=1i-12li,j=1ijyiyjK(xi,xj)(7):0iC,i=1,2,,l,li=1yii=0(8)b3yif(xi)=1,3,iC3i0,C,,SVMsgn(f(x)),f(x)=li=13iyiK(xi,x)+b3=0(9)SVM,SVMSVM,,SVM,SVM412SVMSVM11SVM32271:SVM:,(7)SVM,,(9),SVM:SVM,1,;-1,5(),,,,,,,,,,,,6,,;,;,,,,,,,,,7,,[1].[D].:,,2001.6.[2].[D].:,2006.2.[3].[D].:,2003.12.[4].[D].:,2002.7.[5],.[J].,2001,29(10):1397-1400.[6].[J].,2000,26(1):32-42.4220083