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19856JOURNALOFHARBININSTTUTEOFTECHNOLOGY,,,,,,:1%,4%(5),,,,,,,,,,,,,,,,,(5),,84.12.15,,2.5%,0.5H:~1KH:,205/0.sdbt:Us=/If,,,,,,l,eLaVIJo(l)(t),T(l),,,i=KeZ()K(2),:(2)(1),,,,(2),,,,,(3),,,,l,(a),(b),,,,1..............,,,,,,iii)))1:(t),D,~D,C,,UcU(t),,(,),D,,11i:(0(b),,(t)e:e3e;5,D:D:D;D6,121314f(i,~f6)CC,C(l),:Ul:():(3)RC,H,,H=KU:(3),U,,,R(i=1,2.),t(),,,,(),,(1)(d),,:=K,2,i:K2,i=K,13=ZK+,,2,:i=Ke(4)11=KeZ+(5)i;=KeZ(6)i::=ZKe+a(7)K,e;#A,i,,ZK,a:e,:Ke=ZK+a,:+,:Ke+:=ZK,e;+a:K:+=ZK,+a,(10):a=K2(8)(9)(10)(11)(11)(8)(9),:/2(12)=(13)2:K},/2,=(14)dK,(12)(13)(14),,,,,(1A(2):(),,,3:iK2(15)i,(1+)KeZ(16)i:(1)KeZ(17)132(+r)K+b.(18),,=100%;,ZK(l+);b,:e,:(1)Ke=2(1+)Ke,+b,(19)3e::(1)e,=2(i+)Ke,+b,:(1+)K=2(i+)K,+b,(21):b:K(1+)(22)(19),:(20)(21)(22)(,)(23)(22)(23)(20),:,,=(1+1+y+2(1+)1,/l.VI+yIL1++2(1+)1(24),(23)(24),(4%,,,,,,,,,,,F1,Fc1,(2)(0,(),R(i12.),,RRi=12),(1)R(12),2K-1(a)(b):.,.Rl=1ZK,(25)1.1_-.1RRZZK:n11,=--_2(g:,)(26)=2(1+;)K3(,F1,1Rs1.1~~:,~~~=2,),R=ZK[(1+,)3:(27)++101,n_,i,-ZK(1+y)(3)(28)1.1,,~=1,I55,5R1ZK(1+y)()(29)(2)R,(i12.),:R,Uc..Rle-UezR,(30)R,=Ue,Rz2UeeZR2(31)R4,R4+R4,eUe,R4Uce4(32)RR+R,eUeR,UceUeR(33)(i=1,2.),K,(i=1,2.),Uc(3)R:,,(3).u:=.J2=*M:,:1JOUeZ=RH:,.,.R=Ue2UeZHU:KUeU:1K.U,,R=(34)UC,U*M:,Ke()(U,*:)ZV,U=ZVRR;+R;RZ+R:R-,R(4),,,1.5~2.2F20Hz,,,,,RC(),,,0.5ZV,,,4123H;HZ,H,dH,=H,H,dH:H:H,{dH,1:}dH:}(3):J,rl,dH;;=vMS(3):dU_1U2dHH(35)~----.4(35),UH(3),:(1),,,()D;~D3,D4D,D(1(a)),(2),(3)0.5%,(4),,,,,:l%,F54%,500H:,1,,,1984,1975.9,73,1976ANewApproaehofDesignoftheMeasuringCireuitsandCaleulationofTrueRootMeanSquareofAlternatingCurrentZhangYu:hogAbstrCtAeeordingtothedefioitonandthethismeasuringtheoryoftfUemeansquareofalternatingeurrent,ofdesignofthemeasuringeireuitsPaPerPrOP0sesallewaPPf00t-roaehandoftheealeulation,andProvesitstriely.ItalsogiveswitheneralgraPhieouttheanalysisofthemeasuringerrors.Comparedmethod,thisaPProaeh15Inofeineeleulation,and51nesignal,4%1llofePraetiealinuse.ErrorofaeeurateandsimPlerealeulation:1%totollonSllleignal(erestfaetor(5).84