運輸機超低空空投大氣擾動補償控制研究.pdf

1、南京航空航天大學碩士學位論文運輸機超低空空投大氣擾動補償控制研究姓名：李智申請學位級別：碩士專業(yè)：導航、制導與控制指導教師：陸宇平201012運輸機超低空空投大氣擾動補償控制研究IIAbstractTheTransptAircraftUltraLowAltitudeAir(ULAA)Technologycanobservablyenhancethecapabilityoflongrangemobilitythespeedoflogist

2、icssupptofAirFce.Itstillhasrealisticsignificancesfthemilitarytorespondtovarioussecuritythreatsaccomplishdiversemilitarytasksprotecttheexpingnationalinterests.BecausethetransptaircraftfliesinCphasewhileUltraLowAltitudeAir

3、highaccuracyflightpathtrackingattitudeholdarerequired.DuringthecourseofUltraLowAltitudeAirthetransptaircrafthasthefollowingacteristics:Firsttheaerodynamicperfmanceisnotexcellentanymethecapabilityofdisturbancerejectiondec

4、lines.Secondthecargo’simpactisveryviolentthecenterofgravityoftheaircraftshifts.Thirdtheprobabilityofencounteringturbulencewindshearincreasesobservably.Viaresearchsimulationsdisturbancecompensationcontrolmethodsarepresent

5、edinnovativelytoslowdowntheeffectcausedbyatmosphericdisturbance.Firstofallstochasticturbulencemodeldiscretegustmodellowlevelwindshearmodelwhichareusuallyusedinflightcontrolresearcharepresented.Thenthenonlinearsixdegreeso

6、ffreedommodeloftransptaircraftULAAwithatmosphericdisturbanceisprovided.Basedonthismodelcouplingmovementofaircraftdisturbanceisdeeplyanalysed.AfterthisULAAglideflareairpullupbasiccontrollerslateralbasiccontrollersaredesig

7、nedusingclassicalcontrolthey.Basedonthebasiccontrollersthelongitudinallateralatmosphericdisturbancecompensatingconrollersaredesigned.AtlastfuzzycontroltheyisintroducedtheULAAlongitudinallateralatmosphericdisturbancecompe

8、nsatingfuzzyconrollersaredesigned.Afteranalysingtheresultsofsimulationsconclusionsarepresentedthatbothclassicalcontrollersfuzzycontrollerscancompensatetheeffectsofatmosphericdisturbance.Theflightpathattitudecouldmeetthee

9、xactdemsofULAAwhilethetransptaircraftisdisturbedbydifferentkindsofatmosphere.Comparedwitheachotherfuzzycontrollershavestrongerrobustnesshigherflightpathtrackingaccuracy.Keywds:Ultralowaltitudeairatmosphericdisturbancedis