運(yùn)輸機(jī)超低空空投大氣擾動補(bǔ)償控制研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文運(yùn)輸機(jī)超低空空投大氣擾動補(bǔ)償控制研究姓名：李智申請學(xué)位級別：碩士專業(yè)：導(dǎo)航、制導(dǎo)與控制指導(dǎo)教師：陸宇平201012運(yùn)輸機(jī)超低空空投大氣擾動補(bǔ)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