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,,(,610021):,,:;;;;:U46715+29:A:167224984(2004)0320009204TheprincipleandtestingofautomotivechassisdynamometersXUZhi2min,LIUMei2sheng,QINGYan2ping(NationalInstituteofMeasurementandTestingTechnology,Chengdu610021,China)Abstract:Inthispaper,wewanttointroducethemeasurementprincipleofautomotivechassisdynamometersandatestingmethod1Andwecaneducetheuncertaintyofthestandardvaluebyanalyzing1Keywords:Automotivechassisdynamometers;Outputpowerofdrivingwheel;Drivingforce;Speed;Uncertainty:2004201206;:20042032021,,;,,(),A,2001131,200471GB14761-2001(),,(,,)(),2211212,,,30320045CHINAMEASUREMENTTECHNOLOGYVol130No13May,2004,,,,,W=F1V3311,,(),,(1)vi=105vi6Dn-1100%(1):vii;vii(kmPh);ni(rPmin)312()31211,30kmPh,40kmPh,60kmPh,31212:V=610-5Dn(2):V(kmPh);D(mm);n(rPmin)31213JJF1059-1999616:ucrel(V)=(uDrel)2+(unrel)2(3):ucrel(V);uDrel;unrel31214(1)D0107mm,0107P3=0104(mm),015mm,:uD=0153=0129(mm)uDrel=uD216=0129216=11310-3(D=216mm)10%,:v=1210100-2=50(2)0105%,:unrel=0105%3=21910-45%,:v=125100-2=2001uDrel11310-350unrel21910-420031215:ucrel(V)=(uDrel)2+(unrel)2=(11310-3)2+(21910-4)2=0113%(4)31216veff=(0113%)4(11310-3)450+(21910-4)42005031217veff=50,p=0195,t:kp=2101:Urel(V)=21010113%013%1020045313,:mi=FiD2Lg(5):mi(kg);Fi(N);D(mm);L(mm);g(mPs2),,(6):Fi=FiD2migL-1100%(6):Fii;Fii3(N);D(mm)31431411,,10%,20%,40%,60%,80%,100%,,g31412F=mg2LD(7):F(N);D(mm);m(kg);g(mPs2);L(mm)31413JJF1059-1999616:ucrel(F)=(-uDrel)2+(umrel)2+(uLrel)2(8):ucrel(F);umrel;uLrel31414(1)31214(1)(2)6,:01015%,,:umrel=01015%3=81710-55%,v=125100-2=200(3):0105%,,2mm,:uL=23=112(mm)uLrel=uL432=112432=21810-3(L=432mm)10%,:v=1210100-2=502uDrel11310-350umrel81710-5200uLrel21810-35031415:ucrel(F)=(-uDrel)2+(umrel)2+(uLrel)2=(11310-3)2+(81710-5)2+(21810-3)2=0131%(9)31416303:11veff=(0131%)4(11310-3)450+(81710-5)4200+(21810-3)4507231417veff=72,p=0195,t,:kp=2100:Urel(F)=21000131%016%:(D=216mm,L=432mm,m=24kg)4,,3,,,,,,,?()212,,,(),,,,,,,,,,(17)(2)VXI80MBPs(3)VXI13,VXI,VXIDP1P2,P3P3100MHz,ECL24P3,0ECL,,(4),VXIP116MHz,P210MHzTTLECL12VXI,6,,ISAPCIPXIVXI,VXI,VXI,,1,1PCI1,19972,1PCI1,1996,731VXI14,1VXI1ELECTRONICSTEST1,MAY&JUNE19905,11,20021220045