孔缝对导弹电子设备机箱电磁屏蔽效能的影响

27220063JournalofAstronauticsVol.27No.2March2006,,,(,710025):,,FDTDEZ2FDTDFDTD,,,26dB,:;;;;;:TJ76;0441:A:100021328(2006)0220262206:2004212215;:20052092080,,,,,,,,,,,,;,,;,,,,,,,,[1-3][4],,,,,;[5]VectorFitting,,,,,,,(FDTD),FDTDEZ2FDTDFDTD,,1,,,,FDTDEZ2FDTDFDTD300300120mm3,1:1Fig.1StructureofmetallicshieldingobjectFDTD,Yeeh=x=y=z=3mm,J.P.BerengerPML,,500,FFT1.1()[2]:,:SEd-3(1),:SEs-(3/2)(2),:SEL-3(3),d,s,LFDTD,212mm18mm24mm12mm18mm,9dB,18mm24mm,6dB,,,,,,3P1P2P3Fig.3SketchdiagramofP1,P2andP3intheshieldingobject3622:2P(a)(b)Fig.2Eelectromagneticshieldingeffectivenesscomparisonofapertureswithdifferentlength(a)Comparisonofelectronicshielding(b)Comparisonofmagneticshielding1.2,30mm150mm270mmP1P2P3,3:4,,,,,,4P(a)(b)Fig.4Electromagneticshieldingeffectivenesscomparisonofdifferentpointsinthecase(a)Comparisonofelectronicshielding(b)Comparisonofmagneticshielding1.3,[2]:SEN-11234824mm24mm,5,12,6dB,23,3.5dB,34,2.5dB,48,6dB,(4)(3)(4),,,,5P(a)(b)Fig.5Electromagneticshieldingeffectivenesscomparisonofnumberofapertures(a)Comparisonofelectronicshielding(b)Comparisonofmagneticshielding1.46:,[6],:,,,,,46227,,,,,,,200MHz1000MHz,3dB[7]6(a);(b)Fig.6Arrangementofapertures(a)Arrangementinsequencedorder(b)Arrangementinintersectantorder2,,483mm420mm178mm()7:7Fig.7Structureofrightpaneloftestingcase,,:(1),:8100mm2,99mm2,100,3mm,3mm,89;8P(a)(b)Fig.8Electromagneticshieldingeffectivenesscomparisonofbeforeandafterdesign(a)Comparisonofelectronicshielding(b)Comparisonofmagneticshielding(2),5mm8,,90303mm210099mm2,20dB,480MHzFDTD,9,,,60000voltsPmeter,18000voltsPmeter5622:,10,3dB[7],,3dB9(a)(b)Fig.9Timedomainchartofhighfrequencypulsebeforeandafterdesign(a)Timedomainchartbeforedesign(b)Timedomainchartafterdesign10(a)(b)Fig.10Electromagneticshieldingeffectivenesscomparisonofapertureswithdifferentcollocation(a)Comparisonofelectronicshielding(b)Comparisonofmagneticshielding3FDTDEZ-FDTDFDTD,,,26dB,:[1]LiMn,SRadu,JoeNuebel.Designofairflowaperturearraysinshieldingenclosures[J].IEEETransEMC,Symposium,Denver,CO,1998,42(1):1059-1063[2]LiMin,NuebelJ,DrewniakJL,DubroffRE,HubingTHandVanDorenTP.EMIfromairflowaperturearraysinshieldingenclosures2experiments,FDTDandmoMmodeling[J].IEEETransEMC,2000,42(3):265-275[3]MaKuangping,LiMin,JamesL,Drewniak.ComparisonofFDTDal2gorithmsforsubcellularmodelingofslotsinshieldingenclosures[J].66227IEEETransEMC,1997,39(2):147-155[4]MartinPRobinson,TrevorMknson,ChristosChristopoulos.Analyti2calformulationfortheshieldingeffectivenessofenclosureswithaper2tures[J].IEEETransEMC,1998,40(3):240-247[5],,,.VectorFitting[J].(),2004,44(10):1302-1305[GuoJian,ZouJun,HeJin2liang,ZengRong.EvaluationofEMPShieldingeffectivenessformetallicshellsbasedonthevectorfittingmethod[J].JTsinghuaUniv(Set&Tech),2004,44(10):1302-1305][6],.[J].,2002(2):27-29[LiuChuan,JiangQuan2xing.AMethodformeasuringtheleakthroughapertureandthematerialsshieldingeffectivenessbythestandardwindowinshieldingenclosure[J].Safety&EMC,2002(2):27-29][7]LuFeiyan,ShaFei.AnalysisforshieldingeffectofmetalplatewithapertureswithFDTD[A].3rdInternationalSymposiumonElectro2magneticCompatibility,2002:739-743:(1973-),,,,,:303(710025)E2mail:[e-mail]ntheElectronicEquipmentofMissileonElectromagneticShieldingEffectivenessHEMing,LIUGuang2bin,HUYan2an,JIANGLi2qiang(ThesecondArtilleryEngineeringCollege,Xian710025,China)Abstract:ElectromagneticshieldingeffectivenessofelectronicequipmentdirectlyinfluencestheEMCperformanceofthemis2sileweaponsystem.Andtheelectromagneticleakagefromaperturesoncaseofthedeviceisanissuewhichcannotbeignored.Aimingatthisproblem,EZ2FDTD,aFDTDcomputingsoftware,isusedtotheFDTDmodelinginthispaper.Theinfluenceofap2erturesshape,number,sizeandarrangementonelectromagneticshieldingeffectivenessoftheelectronicequipmentisanalyzedandcomputed.Basedonthis,someimprovingmethodsareintroduced.Toprovethevalidityofmethodsdescribedhere,theelec2tromagneticshieldingdesignofthecaseofelectronicequipmentofacertainmissileiscarriedout,andtheelectromagneticshield2ingeffectivenessisimprovedby26dB.Keywords:Apertures;Missileweapon;Electronicequipment;Cabinet;Electromagneticshielding;Shieldingeffectiveness(249)ExperimentalResearchonDeformationControlforIntelligentAntennaStructurebasedonSelfTuningFuzzyControlYUDeng2yun,XIARen2wei,ZHAOGuo2wei,ZHAOYu(BeijingUniversityofAeronauticsandAstronauticsSchoolofAstronautics,Beijing100083,China)Abstract:WithdSPACEsimulationsystemanddevelopedpiezoelectricceramicactuators,anintelligentantennastructurewasdesignedandfoundedasatestbedandtheexperimentsconcernedofdeformationcontrolweredevelopedinthiswork.Thetra2ditionalPIDmethodwasadoptedintheexperimentsandaselftuningfuzzyPIDcontrollerwasalsoestablished.Thedifferentcon2troleffectscorrespondtoeachmethodwerecomparedinthispaper.Theresultsshowthatundergivenconditions,thepiezoelectricstructuresarevalidinthestructuresdeformationcontrol.Themaximumdisplacementcontrolcapacityoftheactuatoris166m.Thetwomethodsbothcanachievethedeformationcontrolandtheabsolutepositionaccuracyoftheselftuningfuzzycontrolcanreach0.5m