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基于激光测风雷达的机场低空风切变识别算法 Abstract Withtheincreasingnumberofairtrafficaccidentscausedbywindshear,reliablewindsheardetectionalgorithmshavebecomecrucialforthesafetyofairportoperations.Thispaperproposesawindsheardetectionalgorithmbasedonlaserwindradarinthelow-levelairspaceofairports.ThealgorithmutilizestheprinciplesoflaserDopplervelocimetryandsignalprocessingtechniquestoaccuratelyidentifywindshearphenomena.Experimentalresultsdemonstratethattheproposedalgorithmachieveshighaccuracyindetectingwindshear,makingitavaluabletoolforairportweathermonitoringandflightsafety. 1.Introduction Low-levelwindshearisahazardousmeteorologicalphenomenonthatposesasignificantthreattoaircraftduringtakeoff,landing,andlow-altitudeflight.Itiscausedbyrapidchangesinwindspeedanddirectionwithinashorthorizontaldistanceorverticalheight.Accuratedetectionandidentificationofwindsheariscrucialforflightsafetyandefficientairportoperations.Thispaperproposesawindsheardetectionalgorithmbasedonlaserwindradar,whichprovidesreal-timeandaccuratedetectionofwindshearinthelow-levelairspaceofairports. 2.LaserWindRadarPrinciple LaserwindradarutilizestheprincipleoflaserDopplervelocimetrytomeasurethevelocityofatmosphericparticles.Theradaremitslaserbeamsintotheatmosphere,andthebackscatteredlightfromtheparticlesisanalyzedtodeterminetheDopplershift,whichcorrespondstothevelocityoftheparticles.ByanalyzingtheDopplershiftofthebackscatteredlight,thewindspeedanddirectioncanbeaccuratelymeasured. 3.WindShearDetectionAlgorithm Theproposedalgorithmconsistsofthreemainsteps:dataacquisition,signalprocessing,andwindshearidentification. 3.1DataAcquisition Inthedataacquisitionstep,thelaserwindradarcollectsbackscatteredsignalsfromtheatmosphere.Theradarsystemisdesignedtohavehighspatialandtemporalresolutiontocapturefine-scalevariationsinwindvelocity.Thecollecteddataisthenpreprocessedtoremovenoiseandartifacts. 3.2SignalProcessing Inthesignalprocessingstep,thepreprocesseddataisanalyzedtoextractfeaturesthatindicatethepresenceofwindshear.Varioussignalpr