簡介：西南交通大學(xué)碩士學(xué)位論文基于人為因素的航空安全研究姓名溫濤申請學(xué)位級別碩士專業(yè)交通運輸規(guī)劃與管理指導(dǎo)教師蒲云2001111Q1西南交通大學(xué)碩士研究生學(xué)位論文第1I頁ABSTRACTTHESAFETVOFCIVILAVIATIONISIMPORTANTTOTHENATIONALANDPEOPLE’SBENEFIT，ESPECIALLYTOTHEREPUTATIONOFNATIONTHISTHESISDISCUSSESROUNDLYONAVIATIONSAFETYFROMTHEVIEWPOINTOFAVIATIONSAFETYMANAGEMENTITINTRODUCESFIRSTTHEDEVELOPMENTANDACTUALITYOFVRORLDCIVILAVIATIONSAFETYRESEARCH，POINTSOUTEXISTINGDROBLEMSOFCIVILAVIATIONSAFETYMANAGEMENTINCHINATHETHIRDANDFOURTHCHAPTERSDISCUSSMAINLYONTHEMEASUREOFFAUITTREEANALYSISANDIT’SAPPLICATIONINAVIATIONSAFETYMANAGEMENTTHEFIFTHCHAPTERDISCUSSESROUNDLYTHEHUMANFACTORSRESEARCHANDAPPLICATIONFROMASPECTSOFHUMANFACTORSENGINEERING，CREWDECISIONANDCOORDINATION，HUMANPHYSIOLOGYANDPSYCHOLOGYNEXTTHETHESISPROPOSESTHREEMEASURESONAVIATJONSAFETYMANAGEMENTAFTERANALYZLNG1ESTABLISHESMULTICHANNELREPORTINGSYSTEMTOEXPANDTHESCOPEOFACCIDENTSTATISTICS2ESTABLISHESSOUNDACCIDENTANALYSISSYSTEMBYINTRODUCINGFAULTTREEANALYSISANDANALYZEACCIDENTFROMTHEVIEWPOINTOFHUMANFACTORS3IMPROVESHUMANFACTORSRESEARCH，DEVELOPSSAFETYMANAGEMENTCENTEREDONHUMANRESOURCESTHEFIRSTMEASURERESOLVESMAINLYTHEPROBLEMOFACCIDENTSTATISTICSTHE1ASTTWOEMPHASIZEACCIDENTANALYSISANDPREVENTIONTHEOUTCOMEOFFAULTTREEANALYSISINDICATESTHATHUMANFACTORSARETHEMOSTIMDORTANTFACTORINMODERNAVIATIONACCIDENTSSOHUMANFACTORSRESEARCHISTHEMOSTIMPORTANTTOAVIATIONSAFETY，ANDISTHEKEYSTONEOFTHISTHESISTHETHESISAIMSTOIMPROVESTANDARDOFAVIATIONSAFETYBYPROPOSINGMETHODSOFACCIDENTANALYSISANDPREVENTION1IKEYWORDSAVIATIONSAFETYACCIDENTHUMANFACTORS

簡介：合肥工業(yè)大學(xué)碩士學(xué)位論文航空發(fā)動機主軸軸承保持架動平衡技術(shù)研究姓名李立堂申請學(xué)位級別碩士專業(yè)機械工程指導(dǎo)教師趙韓馬純民20030401RESEARCHONDYNAMLCBALANCETECHNOLOGYOFCAGEINEAROSPACEENGINEMANQSHAFEBEARINGABSTRACTUNDERHIGHSPEEDCONDITION，IFTHECAGEOFAEROSPACEENGINEMAINSHAFTBEAINGCAN’TBEBALANCEITSUNBALANCEWILLHAVEDETRIMENTALEFFECTONBEARING．THISWILLINFLUENCEBEARINGLIFEANDRELIABILILY．THETECHNOLOGYOFDYNAMICBALANCEOFCAGEINAEROSPACEENGINEMAINSHAFEBEARINGISWIDELYUSEDINTHEPRODUTIONINDEVELOPEDCOUNTRY．INOURCOUNTRYTHISTECHNOLOGYISSTILLAVACANT．THISPAPERANALYZETHETHEORYOFDYNAMICBALANCEOFTHECAGEBYMEANSOFPIERCINGMANDREL，ANDPERFORMDYNAMICBALANCETESTINSIMPLECAGESTRUCTURETODEMONSTRATETHEDYNAMICBALANCEFEASIBITITYOFCAGEBYMEANSOFPIERCINGMANDREL．THREEINSTALLEDTHEMETHODSRESEARCHEDANDTESTEDINTHISPAPERTOSHOWTHEASSEMBLEDAPPLIANCEOFTHECAGEISSIMPLEINSTRUCTUREANDEASYTOMOUNT．THISPAPERRESEARCHANDCONFIRMREVOLVINGPOSITIONBALANCEMETHODINREVERSEDIRECTIONWHICHISSUITABLEFORSMALLBATCHPRODUCTIONANDDEVELOPSPECIALCAGEDYNAMICBALANCEMACHINESUITABLEFORMASSBATCHPRODUCTIONOFENTERPRISE．KEYWORDSAEROSPACEENGINEBEARINGCAGEDYNAMICBALANCEDYNAMICBALANCEMACHINE

簡介：學(xué)校代碼10406分類號V2636學(xué)號120085201012南昌航空大學(xué)南昌航空大學(xué)碩士學(xué)位論文（專業(yè)學(xué)位研究生）基于網(wǎng)格細(xì)化小波聚類的航基于網(wǎng)格細(xì)化小波聚類的航空發(fā)動機轉(zhuǎn)子系統(tǒng)故障診斷空發(fā)動機轉(zhuǎn)子系統(tǒng)故障診斷碩士研究生丁偉明導(dǎo)師劉曉波教授申請學(xué)位級別碩士學(xué)科、專業(yè)機械工程所在單位航空制造工程學(xué)院答辯日期2015年5月授予學(xué)位單位南昌航空大學(xué)I摘要隨著我國國民經(jīng)濟實力的增強和國際地位的日益提高，現(xiàn)代航空事業(yè)的發(fā)展步伐逐步加快飛機發(fā)動機性能在不斷提高的同時，航空發(fā)動機結(jié)構(gòu)設(shè)計日益繁雜，發(fā)生各種故障的概率隨之上升，所以對于它的穩(wěn)定性和可靠性的要求也會越來越高。轉(zhuǎn)子系統(tǒng)振動故障是造成航空發(fā)動機故障的主要原因之一，當(dāng)轉(zhuǎn)子系統(tǒng)發(fā)生故障時，通常會導(dǎo)致嚴(yán)重的振動問題，甚至導(dǎo)致機毀人亡的事故發(fā)生。因此，對于轉(zhuǎn)子系統(tǒng)進行故障診斷研究，不僅具有重要的學(xué)術(shù)價值，而且對國民經(jīng)濟以及國家安全都有著重要的現(xiàn)實意義。本文將小波聚類算法作為轉(zhuǎn)子系統(tǒng)振動故障診斷方法，在MATLAB環(huán)境下，對故障診斷準(zhǔn)確度即聚類精度進行分析之后，為了能夠更加準(zhǔn)確地判斷出故障類型、提高聚類精度，提出了網(wǎng)格細(xì)化的小波聚類算法，即將網(wǎng)格拆分技術(shù)運用到小波聚類算法，對算法運行過程中的特征空間網(wǎng)格單元進行“網(wǎng)格細(xì)化”以此來對邊界點進行提取，最后對改進前后算法的聚類精度進行理論研究和實驗驗證。在本文中，首先闡述了課題研究的目的及意義，對于航空發(fā)動機故障診斷的國內(nèi)外現(xiàn)狀與發(fā)展趨勢進行了大概的描述；其次，對于航空發(fā)動機進行了分類，并介紹了幾種航空發(fā)動機，對于轉(zhuǎn)子系統(tǒng)振動幾種常見故障的原因與故障發(fā)生時所體現(xiàn)的特征進行了詳細(xì)介紹。第三，在了解小波聚類算法基本原理的基礎(chǔ)上提出了改進的具體方法，即采用網(wǎng)格細(xì)化對其進行改進。第四，詳細(xì)介紹了網(wǎng)格拆分技術(shù)以及選取的二維特征量。最后，介紹了轉(zhuǎn)子系統(tǒng)故障模擬實驗裝置和幾種常見振動故障的實驗方法，進行轉(zhuǎn)子故障模擬實驗，根據(jù)采集到的轉(zhuǎn)子故障數(shù)據(jù)來驗證改進后的小波聚類算法的可行性及有效性。由實驗結(jié)果可以得到網(wǎng)格細(xì)化小波聚類算法比改進前的聚類精度更高，轉(zhuǎn)子系統(tǒng)振動故障診斷準(zhǔn)確度更高。關(guān)鍵詞關(guān)鍵詞航空發(fā)動機，轉(zhuǎn)子系統(tǒng)，小波聚類，網(wǎng)格細(xì)化，故障診斷

簡介：電子科技大學(xué)UNIVERSITYOFELECTRONICSCIENCEANDTECHNOLOGYOFCHINA碩士學(xué)位論文MASTERTHESIS（電子科技大學(xué)圖標(biāo)）論文題目航空發(fā)動機高壓渦輪轉(zhuǎn)子系統(tǒng)航空發(fā)動機高壓渦輪轉(zhuǎn)子系統(tǒng)可靠性研究可靠性研究學(xué)科專業(yè)機械電子工程機械電子工程學(xué)號201221080202作者姓名王齊指導(dǎo)教師黃洪鐘教授RESEARCHONRELIABILITYOFHIGHPRESSURETURBINEROTORSYSTEMINAEROENGINESAMASTERTHESISSUBMITTEDTOUNIVERSITYOFELECTRONICSCIENCEANDTECHNOLOGYOFCHINAMAJORMECHANICALELECTRONICENGINEERINGAUTHORQIWANGADVISORPROFHONGZHONGHUANGSCHOOLSCHOOLOFMECHATRONICSENGINEERING

簡介：西北工業(yè)大學(xué)碩士學(xué)位論文航空泵用無位置傳感器無刷直流電動機控制技術(shù)研究姓名廖東泉申請學(xué)位級別碩士專業(yè)航空工程指導(dǎo)教師馬瑞卿鄧先仲20040801西北」_業(yè)大學(xué)碩上論文摘要ABSTRACTIHISPAPERAGAINSTTHEBRUSHDCMOTORFORAVIATIONPUMPATCURRENTUSEINCHINAWHICHHASSHORTSERVICELIFELOWERRELIABILITYANDCONDITIONNOTTOSATIS行THEDEVELOPINGREQUIREMENTOFAVIATIONFIELDSTAKINGMODERNBLDCMASSUBJECTINVESTIGATEDUSESPOSITIONSENSORLESSCONTROLMETHODTOREALIZEBLDCMDRIVINGANDCLOSELOOPCONTROLFORAVIATIONPUMPOFAIRCRAFTTHISPAPERANALYSESANDSTUDIESTHEWORKPRINCIPLEOFRAREEARTHPERMANENTMAGNETICBRUSHLESSDCMOTORACROSSINGZERODETERMININGMETHODOFTHEBACKELECTROMOTIVEFORCEEMFANDTHESOFTSTARTTECHNIQUEUSINGTHEROTORPOSITIONEXAMINEDBEFORESTARINGANDREALIZESTHEEXTERNALSYNCHRONIZEDRELIABLESTARTOFMOTORTHISMETHODCANDRIVETHEPROPERWINDINGSTOPRODUCEDESIREDROTATIONANDREDUCETHESTARTTIMEINTHISPAPERADUCS12SINGLECHIPMICROCOMPUTERISADAPTEDASCORECONTROLUNITANDTHESMOOTHSWITCHINGFROMTHEEXTERNALSYNCHRONIZEDOPERATIONTOTHEOWNSYNCHRONIZEDOPERATIONISFULLYRESOLVEDBYPULSEWIDTHMODULATIONPWMMODEMEANWHILETHEINDIRECTCLOSELOOPCONTROLOFMOTORSPEEDISREALIZEDBYTHEROTORPOSITIONSENSORLESSSIGNALBYDISCOVERYOFRESEARCHACCORDINGTOCHARACTERSOFTHEAVIATIONPUMPMOTORTHISMOTORSTARTEQUALSTOTHEZEROLOADSOITVERYSUITSFORTHEAVIATIONPUMPATTHESAMETIMEBECAUSETHEMOTORUSESELECTRICCOMMUTATIONITCANOVERCOMEMANYSHORTAGESOFMACHINECOMMUTATIONOFTHESHORTNESSOFBRUSHDCMOTORTESTSSHOWTHATTHEMOTORHAVESMALLVOLUMEHIGHRELIABILITYSTABLYANDFASTSTARTABILITYSMALLSTARTCURRENTWIDERAREAOFSPEEDADJUSTINGANDHARDMACHINECHARACTERISTICITCANSATISFYALLTHEREQUIREMENTOFAVIATIONBUMPMOTORANDWILLBUILDTHEFOUNDATIONFORAPPLICATIONOFAVIATIONPUMPDRIVINGMOTORKEYWORDSAVIATIONOPERATIONPUMPSENSORLESSBRUSHLESSDCMOTOREXTERNALSYNCHRONIZEDEMFOWNSYNCHRONIZEDOPERATIONSINGLECHIPMICROCOMPUTERSPEEDCLOSELOOPCONTROL

簡介：山東大學(xué)碩士學(xué)位論文航空模型螺旋槳的氣動性能分析姓名楊曉玲申請學(xué)位級別碩士專業(yè)機械工程指導(dǎo)教師王勇20061115山東大學(xué)1稃碩士學(xué)位論文AERODYNAMICPROPERRYANALYSIS0FAIRCRAFRMODELPROPELLERABSTRACTINORDERTOIMPROVETHEDESIGNTECHNIQUEANDTHEAERODYNAMICPERFORMANCEOFUAVPROPELLERS，MODEMCOMPUTATIONALFUILDDYNAMIESCFDISINTRODUCEDINTOTHEPROPELLERDESIGNPROCESSANDFLOWANALYSISINTHISTHESIS．MAINRESEARCHWORKCARRIEDOUTINCLUDESTHEFOLLOWINGBASEDONTHELIFTSURFACEMETHODWITHUNDISTORTEDWAKEMODEL，ALIFTSURFACEMETHODWITHAFREEWAKEMODELESTABLISHEDANDTHECOMPUTERCODETOPREDICTTHEPERFORMANCEOFPROPELLERSISDEVELOPEDINWHICHTHEVELOCITYINDUCEDBYVORTEXCOREISTAKENINTOACCOUNTANDANITERATERELAXATIONALGORITHMOFTHEFREEWAKECALCULATIONISCONSTRUCTED．EXAMPLESSHOWTHATTHENUMERICALRESULTSAREINGOODAGREEMENTWITHEXPERIMENTALDATAAVAILABLEANDTHECAPACITYISSUCCESSFULLYEXTENDEDTOHEAVYLOADEDPROPELLER．AMOREACCURATEMETHODBASEDONTHEVORTEXTHEORY,TAKINGACCOUNTOFTHEEFFECTSOFCOMPRESSIBILITYANDTHENUMBEROFBLADESISESTABLISHEDANDACOMPUTERCODEISDEVELOPED．BASEDONTHECONDITIONFORBETZ’SMINIMUMENERGYLOSS，AOPTIMALDESIGNCODEOFPROPELLERISDEVELOPED．EXAMPLEISFOUNDTOBEMUCHSATISFACTORY．BYMEANSOFTHEABOVECFDCODES，THEAERODYNAMICPERFORMANCEOFAUAVPROPELLERISEXAMINEDANDTHETECHNOGICALAPPROACHOFIMPROVINGTHEEFFICIENCYOFTHISPROPELLERISRAISED．THERESULTSOFANALYSISSHOWTHATCOMPRESSIBLEEFFECTCANMAKE9．5％TO12％REDUCTIONOFTHEPROPELLEREFFICIENCYATDESIGNPOINT．THEWAKECONTRACTIONREACHES10％ATADVANCEDRATIOOF0．2，ANDTHELOSSOFSTRONGSHOCKANDVISCOUSEFFECTDUETOTHEONLYAIRFOILCONTOURBLADESEAMSTOBETHEMAINSEASONRESPONSIBLETOTHELOWEFFICIENCYOFTHISPROPELLER．RESULTSANDEXAMPLESSUGGESTTHATTHECFDMETHODSDEVELOPEDINTHETHESIS

簡介：南昌航空大學(xué)碩士學(xué)位論文航空發(fā)動機潤滑系統(tǒng)通用分析軟件算法研究、數(shù)據(jù)庫及界面開發(fā)姓名李靜申請學(xué)位級別碩士專業(yè)航空宇航制造工程指導(dǎo)教師王琦20080401南昌航空大學(xué)碩士學(xué)位論文目錄VIIIABSTRACTTHEKEYTECHNOLOGIESOFGENERALANALYSISSOFTWAREFAEROENGINELUBRICATIONSYSTEMARESTUDIEDWHICHINCLUDINGACTERISTICALGITHMOFTYPICALELEMENTFLUIDWKALGITHMGRAPHICMODELINGDATABASETHEPAPERGIVESTHERMOANALYSISALGITHMOFEACHTYPICALELEMENTINLUBRICATIONSYSTEMBASEDONTHEDESIGNCONCEPTSOFTHETYPICALELEMENTTHECOMPUTERPROCEDUREMODULEOFTHETYPICALELEMENTHASBEENDEVELOPEDINTHEPROCESSOFMODELBUILDINGTHESTRUCTURECHAMBERSOFTHESYSTEMISDIVIDEDINTODIFFERENTCOMPONENTSTHENSYMBOLIZEDBYDIAGRAMMATICSKETCHESFURTHERCONNECTEDINTOASYSTEMTHROUGHNODALSANODALPRESSURERESIDUALCRECTIONMETHODBASEDONTHEDESIGNCONCEPTSOFELEMENTNODEHASBEENUSEDINTHERESEARCHOFFLUIDWKALGITHMAFLUIDWKCALCULATIONMODULEWHICHHASRELATIVELYHIGHPRECISIONGOODCONVERGENCEHASBEENDEVELOPEDTHEWKAUTOIDENTIFICATIONTECHNOLOGYTECHNOLOGYBASEDONTHEEQUIPMENTINTERFACEMETHODHASBEENADOPTEDINTHERESEARCHOFTHEGRAPHICMODELINGTHESOFTWAREWEREDEVELOPEDONTHEPLATFMOFDELPHI7WHILEOBJECTIENTEDVISUALIZATIONTECHNOLOGYWEREADOPTEDINTHISPAPERFRIENDLYMANMACHINEINTERFACECONVENIENTDATABASEMANAGEMENTSYSTEMHASBEENSTUDIEDATTHEENDOFTHISPAPERSOMEPROJECTCASEHASBEENDISIGNEDVALIDATIONUSINGTHISSOFTWARETHEPREDICTEDRESULTSAGREEWELLWITHTHEREQUIRMENTSWHICHSHOWSTHATTHESOFTWARECANSATISFYTHEREQUIREMENTSOFENGINEERINGDESIGNANALYSISKEYWDSLUBRICATIONSYSTEMFLUIDWKALGITHMGRAPHICMODELINGWKAUTOIDENTIFICATIONNODALS

簡介：中圖分類號THL422UDC』墊學(xué)校代碼密級碩士專業(yè)學(xué)位論文10533航空用7075鋁合金蠕變時效工藝及其抗腐蝕行為的研究ASTUDYONTHECREEPAGINGPROCESSINGANDCORROSIONRESISTANCEOF7075ALUMINUMALLOY作者姓名學(xué)科專業(yè)研究方向?qū)W院系、所指導(dǎo)教師姜玉強機械工程機械設(shè)計制造及其自動化機電工程學(xué)院藺永誠教授論文答辯日期坦生』17答辯委員會主席中南大學(xué)2014年5月航空用7075鋁合金蠕變時效工藝及其抗腐蝕行為的研究摘要現(xiàn)代航空航天裝備不斷地向著輕量化，長壽命，高可靠性方向發(fā)展，服役性能也日趨極端化。研究和制造具有復(fù)雜結(jié)構(gòu)的高性能輕合金整體構(gòu)件是航空航天裝備跨越式發(fā)展的有效途徑之一。蠕變時效成形是利用鋁合金材料的蠕變特性和人工時效原理，將蠕變成形和人工時效同步進行的一種先進的現(xiàn)代材料成形技術(shù)。本文針對我國輕合金整體機翼壁板成形技術(shù)相對薄弱的現(xiàn)狀，研究了航空用7075鋁合金的蠕變時效特性。本文的主要研究內(nèi)容和研究成果如下1通過單軸拉伸蠕變實驗，獲得了7075鋁合金的高溫蠕變特性，研究了蠕變時效工藝參數(shù)對7075鋁合金蠕變時效特性的影響規(guī)律。結(jié)果表明蠕變時效工藝參數(shù)對材料的蠕變時效行為有著顯著的影響，材料的蠕變應(yīng)變隨著蠕變時效溫度的升高和外加應(yīng)力的增大而增大。基于陳化理論和0本構(gòu)模型，建立了7075鋁合金的蠕變本構(gòu)方程，該模型可以準(zhǔn)確地描述蠕變應(yīng)變隨時間的變化關(guān)系。2通過掃描電子顯微鏡SEM和透射電子顯微鏡TEM實驗，研究了蠕變時效工藝對材料微觀組織演變的影響規(guī)律。結(jié)果表明7075鋁合金中粗大第二相A1，CUFE和MGSI和中等尺度第二相A1。。MG，CR2和A1，ZR均勻地分布在鋁基體中，蠕變時效工藝對粗大、中等尺度的第二相沒有顯著的影響；7075鋁合金中主要時效強化相是TF和N相，時效強化相隨蠕變時效溫度的升高和外加應(yīng)力的增大而逐漸析出和長大；隨著蠕變時效溫度的升高和外加應(yīng)力的增大，晶界析出相由連續(xù)分布逐漸轉(zhuǎn)化為非連續(xù)分布，晶界無析出帶的寬度也逐漸增大；和無應(yīng)力時效相比，蠕變時效可以細(xì)化晶內(nèi)強化相，減小晶界無析出帶的寬度。3通過電化學(xué)腐蝕實驗、剝落腐蝕實驗和金相實驗，研究了蠕變時效工藝對7075鋁合金抗腐蝕性能的影響規(guī)律。結(jié)果表明蠕變時效工藝改變了7075鋁合金中析出相的大小和分布，進而影響了材料的抗腐蝕性能。在實驗的溫度范圍內(nèi)，隨著蠕變時效溫度的升高，材料的抗腐蝕性能首先提高，然后降低，當(dāng)蠕變時效溫度為393K時，7075鋁合金的抗腐蝕性能最好。此外，外加應(yīng)力也會影響材料的抗腐蝕性能，當(dāng)外加應(yīng)力為230MPA時，材料有著較好的抗腐蝕性能。4通過以上研究發(fā)現(xiàn)，當(dāng)蠕變時效溫度為393K時，7075鋁合金析出相的大小和分布比較合理，材料的抗腐蝕性能較好，適合于大型輕合金整體薄壁構(gòu)件的蠕變時效成形工藝。II

簡介：青島大學(xué)碩士學(xué)位論文飛行模擬器航空地平儀控制系統(tǒng)的研究與設(shè)計姓名劉丹申請學(xué)位級別碩士專業(yè)系統(tǒng)理論指導(dǎo)教師劉勝潘松峰20050501ABSTRAETTHEPAPERDESIGNSTHECONTROLANDSIMULATIONSYSTEMOFTHELEVELFLIGHTINDICATOROFTHEFLIGHTSIMULATOR．THEFLIGHTSIMULATORISTHEFIXTUREONTHEGROUND，WHICHCALLSIMULATETHEWHOLEFLIGHTPROCESS，INCLUDINGFLYINGOFF,FLIGHTANDLANDING．THELEVELFLIGHTINDICATORISONEOFTHEINSTRUMENTSINTHECOCKPITSYSTEM，WHICHISUSEDTOINDICATETHEPITCHINGANGLEANDTHEANGLEOFSIDESLIP．THEINSTRUMENTDRIVEUSESTWOPHASEHYBRIDSTEPPINGMOTOR．INORDERTOELIMINATETHEVIBRATIONINTHELOWSPEEDCONDITIONANDTHESTEPOUTINTHEHIGHSPEEDCONDITION，THESYSTEMUSESTHESECTIONALSPEEDADJUSTMENTWHICHCOMBINESTHELINEARSPEEDADJUSTMENTWITHTHEPARABOLICONE．INADDITION，THECONTROLSYSTEMADOPTSMULTITURNABSOLUTEANGLEENCODERASTHEPOSITIONFEEDBACKMACHINEOFTHEROTORTOREALIZETHEACCURATESERVOCONTROLOFTHESTEPPINGMOTOR．THEDRIVESOFTWAREBASEDONVBCOMPLETESTHESERIALCOMMUNICATIONBETWEENTHEINSTRUMENTCONTROLCOMPUTERANDTHELEVELFLIGHTINDICATOR，REALIZESTHATTHEINSTRUMENTCONTROLCOMPUTECONTROLSTHELEVELFLIGHTINDICATOR．INADDITION，THESOFTWARECOMPLETESTHEDYNAMICDATAEXCHANGEBETWEENTHESIMULATIONSYSTEMANDTHEDRIVESOFTWARE．DESIGNTHESIMULATIONSYSTEMOFTHELEVELFLIGHTINDICATOROFTHEFLIGHTSIMULATORBASEDONTHECONFIGURATIONSOFTWARE，WHICHCANSIMULATETHEOPERATIONOFTHEINSTRUMENTANDDISPLAYTHESEPARAMETERSSUCHASTHEPITCHINGANGLEANDTHEANGLEOFSIDESLIP．SOTHESYSTEMCANMONITORANDCONTROLTHEOPERATIONOFTHELEVELFLIGHTINDICATOR．INTHISPAPER，THEHARDWAREDESIGNOFTHELEVELFLIGHTINDICATORISCOMPLETED．OTHERWISE．THESERIAICOMMUNICATIONBETWEENTHEINSTMMENTCONTROLCOMPUTERANDTHELEVELFLI【GHTINDICATORANDTHESIMULATORSYSTEMBASEDONTHEKINGVIEWAREREALIZED．THEDESIGNCALLMEETTHEDESIGNNEEDOFTHEFLIGHTSIMULATOR．THEDESIGNOFOTHERINSTRUMENTSINTHECOCKPITSYSTEMCANUSEITFORREFERENCE．KEYWORDFLIGHTSIMULATOR；LEVELFLIGHTINDICATOR；SECTIONALSPEEDADJUSTMENT；DYNAMICDATAEXCHANGE；CONFIGURATIONSOFTWARE

簡介：電子科技大學(xué)UNIVERSITYOFELECTRONICSCIENCEANDTECHNOLOGYOFCHINA碩士學(xué)位論文MASTERTHESIS（電子科技大學(xué)圖標(biāo)）論文題目航空發(fā)動機渦輪盤疲勞壽命預(yù)測航空發(fā)動機渦輪盤疲勞壽命預(yù)測與動態(tài)可靠性分析與動態(tài)可靠性分析學(xué)科專業(yè)機械設(shè)計及理論機械設(shè)計及理論學(xué)號201121080301作者姓名張智勝張智勝指導(dǎo)教師黃洪鐘黃洪鐘教授LIFEPREDICTIONANDDYNAMICRELIABILITYANALYSISOFAIRCRAFTTURBINEDISCAMASTERTHESISSUBMITTEDTOUNIVERSITYOFELECTRONICSCIENCEANDTECHNOLOGYOFCHINAMAJORMECHANICALDESGINANDTHEORYAUTHORZHANGZHISHENGADVISORPROFHUANGHONGZHONGSCHOOLSCHOOLOFMECHATRONICSENGINEERING

簡介：南京航空航天大學(xué)博士后士學(xué)位論文高頻環(huán)節(jié)航空靜止變流器研究姓名陳道煉申請學(xué)位級別博士后士專業(yè)機械電子工程指導(dǎo)教師胡育文200121ABSTRACTCIRCUITTOPOLOGIES，CONTROLPRINCIPLES，ANDKEYCIRCUITPARAMETERSDESIGNFORNOVELAVIATIONSTATICINVERTERSASIWITHHIGHFREQUENCYLINK，ANDTHEPHYSICALMODELTESTONTHEBASISOFTHEORYSIMULATIONARECARRIEDOUTINTHISRESEARCHPAPERTHEMAINCONTRIBUTIONSOFTHISWORKARESUMMARIZEDASFOLLOWS1THEAPPLICATIONPROSPECT，DEVELOPMENTANDPRESENTSTATUSFORDC／ACINVERTERSANDASIARESYSTEMATICALLYPRESENTEDDC／ACINVERTERSARECLASSIFIEDINTOTWOCIRCUITSTRUCTURESLOWFREQUENCYLINKANDHIGHFREQUENCYLINK，ANDTHEFORMERISCERTAINLYREPLACEDBYTHELATERSEVERALVALUABLECIRCUITTOPOLOGIESFORINVERTERWITHHIGHFREQUENCYLINKAREPROPOSED2CIRCUITTOPOLOGIESFAMILYOFTHEINVERTERWITHHIGHFREQUENCYPULSEDCLINKISFIRSTLYANDCREATIVELYPROPOSEDTHISINVERTERISCONSTITUTEDOFAHIGHFREQUENCYPULSEDCLINKCIRCUITANDADC／ACINVERTERBRIDGENLEHIGHFREQUENCYPULSEDCVOLTAGEFROMTHEFORLTLERCIRCUITENABLESALLPOWERTRANSISTORSOFTHELATERINVCRTERTEALIZEZVSTWOSTAGECIRCUITSHAVETHEIRSEPARATECONTROLCIRCUITTHEVOLTAGEMODEFEEDFORWARDCONTROLSTRATEGYISINTRODUCEDINTHEFORMERSTAGE，ANDTHETHREESTATEDISCRETEPULSEMODULATIONDPMHYSTERSISCURRENTCONTROLSTRATEGYISINTRODUCEDINTHEDC／ACINVERTERANEWCONCEPTOFDUTYCYCLEEXTENDEDHIGHFREQUENCYPULSEDEVOLTAGEISSECONDLYANDCREATIVELYPROPOSEDSOASTOSIMPLIFYHIGHFREQUENCYDCLINKCIRCUITTHUSTHEHIGHFREQUENCYPULSEDCLINKCIRCUITBASEDONINTERLEAVINGFORWARDCONVERTERISREPLACEDBYHIGHFREQUENCYPULSEDELINKCIRCUITBASEDONSINGLETRANSISTORFORWARDCONVERTERTHEINVERTERHASTHEMERITSSUCHASSIMPLETOPOL095SMALLBULK，LOWERWEIGHT，HIGHEFFICIENCYANDRELIABILITY111EINVERTERTOPOLOGYISVERIFIEDBYTHESIMULATION3APROTOTYPEFOR750VA27VDC／115V400HZACDUTYCYCLEEXTENDEDHIGHFREQUENCYPULSEDELINKASIISSUCCESSFULLYDESIGNEDANDDEVELOPEDTHETESTRESULTSDEMONSTRATETHATTHISPROTOTYPEHASEXCELLENTCOMPREHENSIVEPERFORMANCESSUCHASHIGHPOWERDENSITYHIGHEFFICIENCYSMALLBULK，LOWERWEIGHT，HIGHSTEADYPRECISION，F(xiàn)ASTDYNAMICRESPONSESTRONGOVERLOADANDSHORTCIRCUITABILITYANDHIGHRELIABILITY111ESTATICINVERTERHASWIDEAPPLICATIONPROSPECTTHETECHNOLOGYOFASIISADVANCEDINTHEWORLDANDLEADSINTHECHINA4THEBIDIRECTIONALPUSHPULLCURRENTMODEASLWITHHIGHFREQUENCYLINKBASEDONVOLTAGEINSTANTANEOUSVALUEFCEDBACKCONTROLISDEEPLYINVESTIGATEDAPROTOTYPEFOR250VA27VDC／LL5V400HZACASIISDESIGNEDANDDEVELOPEDBOTHTHESIMULATIONANDTHETESTRESULTSDEMONSTRATETHATTHEBIDIRECTIONALPUSHPULLCURRENTMODEASLWITHHIGHFREQUENCYLINKHASTHEMERITSSUCHASSIMPLETOPOLOGYBIDIRECTIONALPOWERF10WSMALLBULK，LOWERWEIGHT，HIGHEREFFICIENCYFASTDYNAMICRESPONSEANDHIGHRELIABILITYTHEREFORETHISINVCRTERHASGOODAPPLICATIONPROSPECTINLOWPOWERINVERSIOOFIELDS5STEADYANALYSISANDSMALLSIGNALPROPERTIESOFANACTIVECLAMPFLYBAEKCONVERTERAREDEEPLYINVESTIGATEDAPROTOTYPEFOR20W27VDC／15V1A，15V02A，5V04A，HIGHFREQUENCYSOFTSWITCHINGREGULATEDPOWERSUPPLYBASEDONTHECURRENTMODE

簡介：中南大學(xué)碩士學(xué)位論文新型航空機輪防滑剎車控制器的設(shè)計與研究姓名王敬亭申請學(xué)位級別碩士專業(yè)控制理論與控制工程指導(dǎo)教師廖力清20060509ABSTRACTAIRCRAFTANTISKIDBRAKINGCONTROLSYSTEMISONEOFTHEKEYAIRBORNEEQUIPMENTANDPLAYSAVERYIMPORTANTROLEINTHESAFETAKEOFFANDLANDINGTHEEXSITINGANTISKIDBRAKINGCONTROLLERISMOSTLYDESIGNEDWITHANALOGCIRCUIT，ANDPICONTROLMETHODISUSUALLYAPPLIEDINITSOTHEANALOGANTISKIDBRAKINGCONTROLLERHASTHEDISADVANTAGEOFLONGRESPONSETIME，BADADAPTIVEABILITYLOWCONTROLPRECISIONANDLOWBRAKEEFFICIENCYFORTHESAKEOFTHEANALOGCIRCUITITSELFITISIMPOSSIBLETOAPPLYADVANCEDCONTROLALGORITHMINTHEANALOGANTISKIDBRAKINGCONTROLLERITISVERYMEANINGFULTESEARCHANDDESIGNTHEDIGITALANTISKIDBRAKINGCONTROLLERAPPLYINGADVANCEDCONTROLALGORITHMAIMINGATTHEDISADVANTAGEOFLONGRESPONSETIME，DIGITALSIGNALPROCESSORDSPTMS320LF2407ISAPPLIEDTODESIGNDIGITALANTISKIDBRAKINGCONTROLLERANDTHESERVOVALVEISDRIVENWITHPWMPULSEWIDTHMODULATIONCONTROLMETHODAIMINGATTHEDISADVANTAGEOFBADADPTIVEABILITYFUZZYCONTROLSTRATEGYISPRESENTEDINTHEDESIGNOFSYSTEMCONTROLSTRATEGYOWINGTOTHECOMPLEXNONLINEARITYOFTHEANTISKIDBRAKINGSYSTEMANTISKIDBRAKINGFUZZYCONTROLMODELISESTABLISHED，ONTHEBASISOFWHICH，THEFUZZYCONTROLRULESANDFUZZYCONTROLLERAREDESGINEDTHEINPUTSVARIABLESOFFUZZYCONTROLLERARETHEERROROFSLIPRATEANDITSDIFFERENTIAL，ANDTHEOUTPUTVARIABLEISTHECURRENTOFTHESERVOVALVEBECAUSEFUZZYCONTROLISMAINLYBASEDONTHEEXPERIENCEOFHUMANBEING；THEOPTIMALCONTROLISDIFFICULTTOBEOBTAINEDSELFREGULATIONFACTORSAREADOPTEDINTHEFUZZYCONTROLLERTOOPTIMIZETHECONTROLRULESTHESIMULATIONRESULTSAFTEROPTIMIZATIONAREALSOSUPPLIEDINTHISPAPERTHEANTISKIDBRAKINGCONTROLLERDESIGNEDINTHISPAPERHASALREADYPASSEDTHEGROUNDINERTIATESTTHETESTRESULTSSHOWTHATTHEHARDWAREDESIGNOFTHECONTROLLERISFEASIBLE，ANDTHEFUZZYCONTROLSTRATEGYAPPLIEDINTHECONTROLLERISCORRECTANDEFFICIENTTHEANTISKIDBRAKINGCONTROLLERWORKSWELLANDRELIABLYTHEWHOLEANTISKIDBRAKINGCONTROLSYSTEMRUNSSTABLYANDTHEPERFORMANCEOFTHESYSTEMPROVEDTOBEEXCELLENTKEYWORDSANTISKIDBRAKINGSYSTEM，F(xiàn)UZZYCONTROL，SELFREGULATIONFACTORTM320LF2407ⅡI

簡介：點擊查看更多航空發(fā)動機機加工藝執(zhí)行可視化技術(shù)研究與實現(xiàn).pdf精彩內(nèi)容。

簡介：航空遙感影像的陰影處理方法航空遙感影像的陰影處理方法研究研究作者姓名作者姓名李婷李婷導(dǎo)師姓名導(dǎo)師姓名、職稱、職稱姜建國姜建國教授教授一級學(xué)科一級學(xué)科計算機計算機科學(xué)與技術(shù)科學(xué)與技術(shù)二級學(xué)科二級學(xué)科計算機應(yīng)用計算機應(yīng)用技術(shù)技術(shù)申請學(xué)位類別申請學(xué)位類別工學(xué)工學(xué)碩士碩士提交提交學(xué)位學(xué)位論文日期論文日期2012014年1111月107011070112031216861203121686TN82TN82TP75TP75公開公開西安電子科技大學(xué)西安電子科技大學(xué)碩士學(xué)位論文碩士學(xué)位論文航空遙感影像的陰影處理方法航空遙感影像的陰影處理方法研究研究李婷計算機科學(xué)與技術(shù)計算機應(yīng)用技術(shù)工學(xué)碩士姜建國教授2014年11月學(xué)校代碼學(xué)校代碼分類分類號學(xué)號密級作者姓名作者姓名一級學(xué)科一級學(xué)科二級學(xué)科二級學(xué)科學(xué)位類別學(xué)位類別指導(dǎo)教師姓名、職稱指導(dǎo)教師姓名、職稱提交日期提交日期

簡介：碩士學(xué)位論文航空發(fā)動機關(guān)鍵部件形狀優(yōu)化研究ASTUDYOFSHAPEOPTIMIZATIONOFCRITICALCOMPONENTSINAEROENIGNES學(xué)號21310030大連理工大學(xué)DALIANUNIVERSITYOFTECHNOLOGY大連理工大學(xué)碩士學(xué)位論文摘要航空發(fā)動機作為航空飛行器的“心臟”，直接影響著飛行器的性能，在國家安全和國民經(jīng)濟領(lǐng)域具有重要作用。發(fā)動機性能指標(biāo)中最重要參數(shù)之一就是推重比。對典型部件進行輕量化設(shè)計不僅可以提高發(fā)動機的推重比，還可以帶來直接的經(jīng)濟效益，因此減重優(yōu)化設(shè)計一直是航空學(xué)者們的研究重點。隨著計算機技術(shù)的發(fā)展，將CAD／CAE技術(shù)結(jié)合優(yōu)化技術(shù)進行結(jié)構(gòu)優(yōu)化設(shè)計，己成為航空發(fā)動機設(shè)計階段的一個重要環(huán)節(jié)。輪盤和空心風(fēng)扇葉片作為航空發(fā)動機關(guān)鍵部件，也是發(fā)動機的主要承重部件。因此本文以輪盤和空心風(fēng)扇葉片研究對象，結(jié)合UG建模軟件和ANSYS有限元分析軟件，利用基于近似模型的全局優(yōu)化方法在MATLAB環(huán)境中實現(xiàn)了部件的減重優(yōu)化設(shè)計。本文具體的研究工作主要包括三個部分1螺栓孔二維簡化模型的精度研究。多級輪盤三維有限元分析工作量巨大，因此常用二維軸對稱模型進行替代分析。由于螺栓孔為非軸對稱結(jié)構(gòu)，若用平面應(yīng)力單元模擬，需要考核二維計算的精度。另外，本文針對帶孔輪盤提出一種二維／三維混合模型的分析方法，并通過算例證明了該方法對孔邊應(yīng)力和位移的計算具有較高的精度，為帶孔模型的精確高效計算提供了一種有效的方法。2多級輪盤的優(yōu)化設(shè)計。首先對多級輪盤二維軸對稱模型進行參數(shù)化建模和多物理場耦合計算。在原始設(shè)計的基礎(chǔ)上，以多個應(yīng)力水平作為約束指標(biāo)，針對不同的優(yōu)化目標(biāo)進行了兩種方案的優(yōu)化設(shè)計。兩種方案利用CORSRBF優(yōu)化方法均獲得了滿足約束要求的設(shè)計方案。3空心風(fēng)扇葉片的優(yōu)化設(shè)計。本文研究了空心風(fēng)扇葉片加強筋的設(shè)計方法，提出一種基于相對曲線坐標(biāo)的葉片加強筋參數(shù)化造型方法，能夠避免幾何干涉問題。空心風(fēng)扇葉片問題以減重為優(yōu)化目標(biāo)，綜合考慮應(yīng)力、位移和頻率約束，利用CORSRBF優(yōu)化方法得到了滿足約束的優(yōu)化方案。優(yōu)化后的空心風(fēng)扇葉片減重近20％，取得了很好的效果。關(guān)鍵詞航空發(fā)動機部件減重優(yōu)化；二維簡化模型研究；二維與三維混合模型；多級輪盤優(yōu)化；空心風(fēng)扇葉片優(yōu)化