大型灭火飞机投水算法分析

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1、AbstractLargenumbersofforestresourcesareburnedbecauseofforestfireoccurseveryyearinourvastexpanseofforest.Asquicklycontrolandextinguishfirecanreducethelossofforestresources.Inordertomeettherequirementsofextinguishfireintheforestinourmotherland.TheurgentthingneedtodoistodevelopanAirTanke匚Thebegi

2、nningofestablishmentanddevelopmentofournationalAirTankerwillmakeupthestatusofnoAirTankerinourcountry,anditwillprovideanewapproachtoChina'sforestfirefighting.AsanAirTanker,thedrowningsystemisthemostimportantpartintheentireaircraftsystem・Andasthecoreofthedrowningsystemthealgorithmfordroppingwate

3、ractamoreimportantrole.Drowningsystemcancalculatethebestdeliverypointlocationbasedonaircraftflightaltitude,speed,headingandthewindspeedanddirectionnearthefire.Anditwillprovidecorrectionoftheheadingnumericalvalueandthetimeneededtogetthecurrenttarget,alsoitcanguideaircrafttoreachthebestlaunchpoi

4、ntforwaterdeliveryandpredicttheextinguishingeffect.Thisarticlehasproposedaneffectivealgorithmfordroppingwaterafterstudythefire-fightingaircraftdrowningprocess.ThealgorithmfordroppingwaterprovidesaschemeforthedesignofdrowningsystemforournationalAirTanker.Thatwillpromotethedevelopmentoftheprojec

5、taboutournationalAirTanke匸Firstly,accordingtotheCCRPaimingprinciple,freeturbulentjettheoryandraindropfallingprincipletoestablishthewaterdeliverymodel,waterintheairmotionmodelandtheextinguishingeffectanalysismodel,accordingtotheestablishedmodelestablishesthelarge-sizeaircraftsforextinguishingfi

6、reinaalgorithm;thenusingMatlab7.0tocalculatethedisplacementandfallingwaterfalltime,obtainedindifferentdiameters,drowningweight,windfieldundertheconditionsofthepointpositionandtheextinguishingeffect;accordingtoaalgorithmforthedesignoflarge-sizeaircraftsforextinguishingfirewatersystem,anditprovi

7、desadataformaboutthefalltimeofthewaterandthejourneywithoutwind,alsoitgivesthedisplayformatontheHUDscreenabouttheparametersofcollimationandtheextinguishingeffect.AccordingtotheMatlab7.0calculateddatawithY-12aircraftthefieldtestcomparison