对仪表着陆系统下滑信标简介-豆柴文库

对仪表着陆系统下滑信标简介.docx

2024-11-08

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ResearchonthemonitoringparameterschangeoftheILSGPnearfield Thepurposeandthesignificanceofthesubject: TheILSglidepathcanbeusedinthenormalcasesofthemonitoringandthemonitoringparametersnearfieldisoneoftheimportantparameterstojudgmentwhethertheILSGPisworkinnormal.Therearemanyfactorstoinfluencethemonitoringparametersnearfiled,forexamplethechangeofthereflectionarea,thechangeofthesurroundingenvironmentsuchasthetemperatureandhumidity,andwhetherthepositionofthemonitoringantennanear-fieldareaccurate.Ifwecananalyzethesefactors,theILSGPcanbejudgedeasilywhetheritisworkinnormal. Themainresearchcontents: Determinethepositionofthemonitoringantennanearfieldunderdifferentreflectionarea.Suchasthereflectionareahavedepression,slope,etc.Andanalyzetheotherpossiblecausesofthemonitoringparametersnearfield. LearntousethesimulationsoftwareLAGONWorkshops4.0.ItcandrawthecurvesaccordingtocomputethemonitoringparametersnearfieldtojudgewhethertheGPisinnormalwork.Introduceoneofthesystemsinthesoftwarebelow,thereferencesystems: •Select"NulRef" •GototheGPLayoutpanelandchoosetheKathreinantenna •Backtothemainpanel,select"ElevationOrbit"andReferencepoint"Mast/horizontal" •ComputetheCSBfieldpatternsat10000m,1000m,315m •Copy/PastethecurvesinaWordPadfileandnotewhichcurveiscorrespondingtowhichdistance Green=10000m,red=1000m,black=315m Wecanlearnfromthecurvesthatwhencomingclosertotheantennathefieldstrengthincreasesbecausethespaceattenuationdecreases. •SelectReferencepoint"Runway" •DeleteallcurvesandcomputeagaintheCSBfieldsat10000m,1000m,315m •Copy/PastethecurvesinaWordPadfileandnotewhichcurveiscorrespondingtowhichdistance Green=370m,red=10000m,blue=1000m Withthereferenceatrunwaycentreline,whencomingclosertotheGPmasttheazimuthanglewithregardtotheGPantennaschanges.TheKathreinantennahasanullnearthethreshold.Sobecausethereceiverisapproachingthisnullthefieldstrengthdecreaseevenisthereceiverisclosertotheradiatingantennas. •Keepthereferencepointat"Runway"andcomputetheSBOfieldcurvesat10000m,1000m,315m. Green=315m,

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对仪表着陆系统下滑信标简介.docx

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