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20086223JournalofAcademyofArmoredForceEngineeringJun.2008Vol.22No.3 :1672-1497(2008)03-0013-04刘美玉 张永庆 路 靖(,100049) :、MTBF,2、。,,,;,、,MTBF,,,,。,。:;;;:TJ430.6+2 :AComparisonBetweenSequentialTruncationandType-ICensoringforReliabilityStatisticalTestingSchemeLIUMei-yu ZHANGYong-qing LUJing(MilitaryRepresentativeAgentofCommunicationDepartmentofGeneralStaffStationedBeijingRegion,Beijing100049,China)Abstract:TheschemesintroducedinthispaperareType-Icensoringandsequentialtruncation.AnalysisandcontrastbetweenthetwoareconductedonconditionofthesameMTBFandriskforbothmanufacturerandconsumer.Advantagesanddisadvantagesofthetwoaredrawnfromexperiments.Theformercanpredicatemaximumaccumulatedoperationaltimeandresourcestheinspectionwillcost,butittakesalit-tlelongertimeandisexpensive,thusitmaygoforreliabilityassessmentandacceptanceinspectionforweaponandequipment,whilethelattercanneitherpredicatemaximumaccumulatedoperationaltimeorresourcesitmaycost,northevalueofMTBF,soitcannottruncatetheinspectionunlesspredefinedac-ceptanceanddeclinespecificsaresatisfied,butitrequiresshorteroperationaltimeandlowercostcom-paredwiththeformerone,thusitissupposedtobeappliedinthefieldofreliabilityverificationinspec-tionforweaponandequipmentandthefieldsofmedicalresearchandetc.Rulesofchoosingtestingschemewhichcombinewithpracticeandstandardsareconcernedatthesametime.Keywords:Type-Icensoringtruncation;sequentialtruncation;reliability;statisticaltestingscheme:2007-08-26:(1966-),,,,. 、、,、、[1],。,、、,,。,[1],22 。,,。,、。,、2,,,、。1 、 ,(MT-BF)(Pission)[2-4],,:MTBFθ1θ0,β,α,d。β(MT-BF)θ1,,(MTBF)θ1,β;α(MTBF)θ0,,MTBFθ0,α;d=θ0/θ1,d,d,,1.5、23[5-6]。1.1 ,。N,n,T0。,r,rTr,T0r,Tr≥T0,;T0,r,TrT0,。α、β、d,GJB899-1990GJB376A-2001[4-5],。1.2 N,n,r,(r=1,2,3,…)(T1,T2,T3,…),T,TA=h+sr,TB=-h+sr,s,r。T≥TA;T≤TB,;TBTTA,。,r,,,,1。1 GJB367A-2001[5]GJB899-1990[6]。2 2β=α(),d、θ0、θ1、r,,MTBF(θ1)=2000h,β=α=10%,d=θ0/θ1=3,r=5。,MTBF(θ1)=2000h,GJB899-1990[6],T=n×t0=9.3×2000(θ1)=19600h,r=5,,55,,θ()=n×t0/r=3920h。,GJB899-1990[6],、1;2,2,、,3-,。3,r15:TA≥t()×MTBF(θ1)=5.4×2000=10800h,TA≥t()×MTBF(θ1)=10.35×2000=20700h。1 /(%)βαβα5101011.110.93.05.407.0510.3514 3:2 tTB≤TA≥0-1-5.4020.577.0532.228.7043.8710.3555.5210.352 3 -t()TB≤TA≥0-3.751-5.4020.577.0532.228.7043.8710.3555.5210.3567.1710.35710.35-3 23.1 ,、、、,。,、,,。3.2 (TA)(r),,,,,,,3,r=5,TA=20700h;r=1,TA=10800h。3.3 (MTBF),,,,,,,MTBF;,(α,β),MT-BF(θ0,θ1),,,r,,。3.4 ,[5]。,,,,。,,,。4 4.1 ,MTBF,,,。,MT-BF,MTBF,,。,(MTBF),MTBF。,2。,MTBF1522 ,;(α、β)MTBF(θ0θ1),,。4.2 (),,[1];,,,;,[5];,。4.3 ,,,,,。,,,;、,;。,、。5 ,、、,,,,,,、,,,、。、,,,、。2,。:[1] GJB450A-2004[S].[2] ,.[M].:,1995.[3] ,.[M].:,2005.[4] ,,,.[M].:,1995.[5] GJB367A-2001[S].[6] GJB899-1990[S].(:)16