HALT试验高效率振动剖面的建立

27320065JournalofAstronauticsVol.27No.3May2006HALT,,(,410073):HALT(HighlyAcceleratedLifeTest,),HALT,MatlabPSimulink,HALT()()(),HALT,:;;;;:TB535:A:100021328(2006)0320531205:2005206228;:2005212201:(41319030101)0,,(SimulationTest)(StimulationTest)[1],,,,,,,,:,,G.K.Hobbs(HighlyAcceleratedLifeTest,HALT),[2],HALT,HALT,,HALTHALT,,(RepetitiveShockMachine,RS)RS()RS2(10,),:[3]G.HendersonLambertR.G,2[2],RS,RS,,(ElectrodynamicShaker,ED),HALT[4]HALT,,,©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[5]HALT,HALT1HALT,,,,HALT,,,,11Fig.1Dynamicmodelofabase2excitedSDOFsystemyx:H(s)=Y(s)X(s)=cs+kms2+cs+k(1)n=km,=c2mk(2)H(s)=2ns+2ns2+2ns+2n(3)n,,,BWH,BWH=2fn2HALT,,,[6,7]xX(f),yY(f),H(f)Y(f)=|H(f)|2X(f)(4)BWY=min{BWH,BWX}(5)x(t)y(t)=+-x()h(t-)d(6)h(t),,y(t)=lim0n6nk=1x(k)h(t-k)k(7)x(k),k,y(t)t,y(t):,0=12BWX,0BWX,BWX,0,0nk,,t,y(t)=6nk=1x(k)h(t-k)kk,(),,,23527©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(),,,tsmk,y(t),,,ts,tsnk,,y(t),,0nknts,0nty,,01PBWXts1PBWH,0ntyBWXmBWH,,;,,,,,;,,,3SimulinkMatlab,Mathworks,Simulink,3.1,,[6]MatlabPSimulink,,K,i=Kei,ei,iti,i=Kei,itt(i+1)tiei,K=1/t(8),22Fig.2Chartshowingtheschemeofsimulationt1,supergauss,num(s)=2ns+2n,den(s)=s2+2ns+2n3.2HALT,()()(),:(1)(),:a.,;b.,;c.,;(2)(),:d.,;e.,;f.(),,::,0,;,,3353:HALT©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.{BWs,BWx}:,;,;,,4HALT,:(),(),;,,,,;,(),,;,,5HALTSteinberg,200Hz300Hz[10],PeterA.Engel10kHz,36kHz[11]2000Hz,[12]PQFP,33Fig.3Sketchmapofexperimentalverification5.16Edimax,,2,3EDED14g5,,111Table1Resultsofcontrastiveexperiment1(Hz)200020020PQFP()906845725639816242:ED,,(),43527©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()624532563928594230:ED,,,,6HALTHALT,HALT,,HALT:[1].[J].,1998,(4):44-47[CHENQi2miao.ReviewofreliabilityenhancementtestinUSA[J].QualityandReliability,1998,(4):44-47][2]GreggK.Hobbs.AcceleratedReliabilityEngineering,HALTandHASS[M].JohnWiley&SonsLtd,2000[3].[D].,:,2004[JIANGPei.FatigueFailureEnhancementMechanismoftheAll2AxesRandomVibrationTestingEnvironment[D].Changsha:NationalUniversityofDefenseTechnology,2004][4],,,.[J].,2005,18(2):179-183[JIANGYu,CHENXun,TAOJun2yong,ZHANGChun2hua.Thetechniqueofgeneratingsuper2gaussianandquasi2randomvibrationexcitingsignais[J].JournalofVibrationEngineering,2005,18(2):179-183][5],,,.HALT[J].,2004,25(2):195-200[CHUWei2hua,CHENXun,WANGKao,YUANJie2hong.Designoftheefficienttemperatureprofileofhighlyacceleratedlifetest[J].JournalofAstronautics,2004,25(2):195-200][6]Hu,JimmyM.Lifepredictionanddamageaccelerationbasedonthepowerspectraldensityofrandomvibration[J].JournaloftheInstituteofEnvironmentalSciences,Jan2Feb,1995;38(1):34-40[7]YUL,DASPK,BARLTROPNDP.Anewlookattheeffectofbandwidthandnon2normalityonfatiguedamage[J].FatigueFractureofEngineeringMaterialsandStructures,January2004;27(1):51-58[8],.MATLABPsimulink[M].:,2002[XUEDing2yu,CHENYang2quan.SystemSimulationTechnologyandApplicationBasedonMATLABPsimulink[M].Beijing:TsinghuaUniversityPress,2002][9],.[M].:,2003[WANGYong2de,WANGJun.BasicofRandomSignalAnalysis[M].Beijing:PublishingHouseofElectronicsIndustry,2003][10]SteinbergDS.VibrationAnalysisforElectronicEquipment[M].2ndEnd.NewYork:Wiley,1988[11]EngelPA.StructuralAnalysisofPrintedCircuitBoardSystems[M].Berlin:Springer2Verlag,1993[12].[D].,:,2004[CHUWei2hua.TestMethodResearchonReliabilityEnhancementTestforModule2LevelElectronicProducts[D].Changsha:NationalUniversityofDefenseTechnology,2004]:(1977-),,,,.:(410073):13873190709E2mail:[e-mail](561)5353:HALT©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(ISN,710071):,,:,,,,,,,263++h.264,,,PSNR0.3dB:;;;(535)OptimizationofVibrationProfileforHighlyAcceleratedLifeTestJIANGYu,CHENXun,TAOJun2yong(ResearchInstituteofMechatronicsEngineering,CollegeofMechatronicsEngineeringandAutomtion,NationalUniversityofDefenseTechnology,HunanChangsha410073,China)Abstract:HALTisanewtechniqueforreliabilitytest,butthereisfewtheoreticalguidanceonhowtodeterminetheefficientvibrationprofileatpresent.InallusiontothevibrationstressinHALT,thispaperfirstsimulatestheresponseofthespecimensubjectedtothevibrationexcitationwithsuper2gaussianprobabilitydistributionandanalterablepowerspectraldensityusingMatlabPSimulink.Thentheinfluenceofthevibrationexcitationprofileparameters(e.g.excitationbandwidth,excitationkurtosisandtherootofmeansquareofexcitation)andthedynamicalcharacteristicofthespecimenitself(e.g.naturalfrequenciesanddampingratiooftheproductundertest)ontheresponsecharacteristicofthespecimen(e.g.responsebandwidth,responsekurtosisandtherootofmeansquareofresponse)isstudied,andtheoreticalexplanationisgivenforthesimulationresults.Atlast,themethodofdesigningtheoptimalvibrationprofileissummarizedandvalidatedbyexperimentsonPCBswhichplayacriticalroleinelectronicequipment.Theres