隐身技术-Stealth-technology2

LOGOStealthtechnology•Inthemodernwar,whohastechnicalsuperiority,whowillwinthewar•StealthtechnologyisoneofthemostimportanttechnologiesStealthfighterStealthwarshipStealthtankWhatisstealthtechnology?•Accurateterms:lowdetectable(可探测）technique•Intheearlydays,inordertoimprovethesurvivabilityoftheaircraft,peoplemaketheplaneflyhigherandfaster，suchas:SR-71U-2•Butwiththedevelopmentofthemissile,thisideaisoutofdateDuringthe1970s,theU.SDepartmentofDefenselaunchedtheprojecttodevelopastealthfighter•In1975,thefirstgenerationofstealthaircraftappearedF-117•Itsradar-cross-section(RCS)isonly0.01m²Nighthawk(夜鹰）•In1991,theGulfWar,itslippedintotheIraqiairspace,droppedthefirstbomb,destroyedIraq'sairdefensesystemandcommandcenter•ItalsoparticipatedintheKosovowarandtheIraqwar•Thenthethirdgeneration:•ThentheU.S.DefenseDepartmenthasdevelopedthesecondgenerationofstealthaircraft:B-2F-22F-35BycomparisonwecanfindhowtoachievestealthUniqueshape1Waveabsorbingmaterials2reducetheheatradiation3Isittruethatthestealthplanewillnotbefound?•aslongasitiscloseenough,itwillbefoundbyradar•Passiveradar(无源雷达）canincreasetheprobabilityofaplanebeingdiscovered•OnMarth27th,1999,duringtheKosovowar,withthehelpofpassiveradar,Southalliance(南联盟）shotdownaF-117•OnMay7th,1999,TheUnitedStatesbombedtheChineseEmbassywithB-2LOGOJ-20OurstealthfighterSharpsword(利剑）FC-31ThisisthelatestNO.2017J-20•Metalcoating（金属镀膜）•Preventradarwavefromshiningintocockpit(座舱）J-20isthemostadvancedfighterinourcountry.However…•Duckwing（鸭翼）F-22•notdoagoodjobinreducingtheheatradiationDiagramInthefieldofstealthtechnology,chinastillhavealongwaytogo