簡介：碩士學位論文碩士學位論文航天器撓性附件動力學相似性理論及實驗研究RESEARCHOFSPACECRAFTFLEXIBLEATTACHMENTDYNAMICSSIMILARITYTHEORYANDEXPERIMENT譚利臨譚利臨哈爾濱工業(yè)大學哈爾濱工業(yè)大學2012015年6月CLASSIFIEDINDEXV416UDC620DISSERTATIONFORTHEMASTER’SDEGREEINENGINEERINGRESEARCHOFSPACECRAFTFLEXIBLEATTACHMENTDYNAMICSSIMILARITYTHEORYANDEXPERIMENTCANDIDATETANLILINSUPERVISORPROFQINAIMINGACADEMICDEGREEAPPLIEDFORMASTEROFENGINEERINGSPECIALITYSPACECRAFTDESIGNAFFILIATIONDEPTOFASTRONAUTICENGINEERINGDATEOFDEFENCEJUNE,2015DEGREECONFERRINGINSTITUTIONHARBININSTITUTEOFTECHNOLOGY

簡介：中國民用航空學院碩士學位論文摘要論文緊密結(jié)合航空發(fā)動機維修中的實際問題，對維修過程中的裝配間隙對發(fā)動機性能的影響進行統(tǒng)計分析，介紹了多元線性回歸的基本理論和方法，重點分析了發(fā)動機裝配間隙對風扇壓氣機和渦輪性能的影響。論文完成以下主要工作T收集了AMECO近年來維修的PW4000發(fā)動機的裝配間隙數(shù)據(jù)和試車數(shù)據(jù)，并對數(shù)據(jù)進行整理，以此作為統(tǒng)計分析的依據(jù)2用相關(guān)分析和逐步回歸方法選擇那些對發(fā)動機性能有重要影響的間隙，將選出來的間隙與EGT建立多元線性回歸模型和多元非線性回歸模型，通過計算以及對回歸模型的檢驗后，給出兩種模型下的擬合效果圖，繪出EGT隨間隙變化的性能曲線圖，最后還分別用兩種模型進行預(yù)測，得到合理的結(jié)果3通過逐步回歸方法選擇對發(fā)動機其余的性能參數(shù)如N2NT和WF有重要影響的間隙，將這些選出來的間隙與三個性能參數(shù)建立多元非線性回歸模型，通過計算和對回歸模型的檢驗后，給出在該模型下的擬合效果圖，繪出三個性能參數(shù)隨間隙變化的性能曲線圖，最后還分別用該模型對四個樣本進行預(yù)測，得到合理的結(jié)果4用逐步回歸方法選擇出對發(fā)動機的推力有重要影響的間隙，并建立間隙與推力之間的多元線性回歸模型并通過該模型進行預(yù)測，得到合理的結(jié)果結(jié)合課題工作，論文利用VC和ODBC數(shù)據(jù)庫開發(fā)了應(yīng)用程序，通過該程序可以對EGT等航空發(fā)動機性能參數(shù)進行了分析，為評估、預(yù)測裝配間隙對發(fā)動機性能影響提供了參考，為以后發(fā)動機維修提供參考和指導。關(guān)鍵詞航空發(fā)動機間隙性能分析多元回歸分析一一一一一一一一一一一一絲韭遇碩士學位論文ACCORDINGTOTHEACHIEVEMENTOFTHEPROJECTANAPPLICATIONPROGRAMISDEVELOPEDBYVCLANGUAGEANDODBCDATABASESUCHPROGRAMCANBEUSEDTOANALYZETHEPERFORMANCEPARAMETERSSUCHASEGTN2N1ANDWEITALSOCANGIVESOMEREFERREDADVICEOFMAINTENANCEWHENTHEINFLUENCETHATTOLERANCECLEARANCESAFFECTEDAEROENGINEPERFORMANCEISESTIMATEDANDFORECASTEDKEYWORDAEROENGINETIPCLEARANCEPERFORMANCEMULTIREGRESSIONM

簡介：全日制碩士學位論文航空鋁合金零件銑削航空鋁合金零件銑削三維三維殘余應(yīng)力殘余應(yīng)力模型模型研究研究THERESEARCHOFTHREEDIMENSIONALMODELOFRESIDUALSTRESSOFAVIATIONALUMINUMALLOYPARTSONMILLING申請人姓名王明杰指導教師高國富教授學位類別工學碩士專業(yè)名稱機械工程研究方向精密超精密加工技術(shù)與裝備河南理工大學機械與動力工程河南理工大學機械與動力工程學院學院二0一四年六一四年六月中圖分類號中圖分類號TG506密級級公開公開UDC621單位代碼單位代碼10460航空鋁合金零件銑削三維殘余應(yīng)力模型研究THERESEARCHOFTHREEDIMENSIONALMODELOFRESIDUALSTRESSOFAVIATIONALUMINUMALLOYPARTSONMILLING申請人姓名申請人姓名王明杰王明杰申請學位申請學位工學碩士工學碩士學科專業(yè)學科專業(yè)機械工程機械工程研究方向研究方向精密超精密精密超精密加工加工技術(shù)與裝備技術(shù)與裝備導師導師高國富高國富職稱職稱教授教授提交日期提交日期201464答辯日期答辯日期20146河南理工大學

簡介：廣西大學碩士學位論文航空鋁合金的沖擊韌性研究姓名王力軍申請學位級別碩士專業(yè)材料加工工程指導教師曾建民20050501廣西大學碩士學位論文航空鋁合金的沖擊韌性研究力集中影響，先減小后增大，縱向中面等效應(yīng)力近乎不變，最大等效應(yīng)力出現(xiàn)在缺口根部；標準缺口應(yīng)力集中系數(shù)KT是時間的函數(shù)，隨時間的增加，KT緩慢增大后又緩慢減小，其中夏氏U型與夏氏鑰匙型變化近似重合，應(yīng)力集中系數(shù)最小，梅式U型次之，夏氏V型最大；標準缺口試樣對缺口根部達到斷裂的響應(yīng)時間不同，夏氏V型最快，其次是梅氏U型和夏氏U型，夏氏鑰匙型最慢。2缺口的外形尺寸對于缺口根部應(yīng)力分布具有較大的影響，缺口越深，曲率半徑越小，缺口側(cè)邊夾角越尖銳，缺口根部區(qū)域應(yīng)力越集中，缺口頂端的曲率半徑影晌作用最大，側(cè)邊角和缺口深度起次要作用。3根據(jù)計算結(jié)果設(shè)計了刀切I型缺口沖擊試樣，充分強化材料本身的應(yīng)力狀態(tài)，大大提高了用沖擊試驗方法檢驗高韌性材料本身缺陷的敏感性。4當裂紋擴展功遠大于裂紋萌生功時，試樣處于韌性斷裂狀態(tài)，反之處于脆性斷裂狀態(tài)，航空鍛造鋁合金LD2鋁合金的塑性變形能和裂紋失穩(wěn)擴展能之和遠大于彈性變形能，證實航空鍛造LD2鋁合金是高塑性合金，采用常規(guī)沖擊方法一夏比CHARPYV型缺口沖擊試驗檢驗其材料具有一定的局限性。5不同含氫量下的不同類型試樣的沖擊韌性值存在明顯差異，刀切I型缺口沖擊試樣對氮最為敏感，而氫含量在0．1ML_／1009左右，無缺口試樣更為實用。6隨著合金氫含量的增加，其不同缺口形式的沖擊試樣沖擊韌性值呈不同速度增長；沖擊韌性值的大小較大程度上與氫存在的形態(tài)和分布II

簡介：申請上海交通大學工程碩士學位論文航天器球形承力式貯箱研究航天器球形承力式貯箱研究院系機械與動力工程學院工程領(lǐng)域機械工程交大導師于忠奇副教授企業(yè)導師李程剛研究員工程碩士秦震學號1110212027上海交通大學機械與動力工程學院上海交通大學機械與動力工程學院2014年5月

簡介：南京航空航天大學碩士學位論文航空金屬塊體材料電子散射與納米碳管相關(guān)力學問題的計算模擬姓名陳裕申請學位級別碩士專業(yè)飛行器設(shè)計指導教師沈海軍20070301航空金屬塊體材料電子散射與納米碳管相關(guān)力學問題的計算模擬IIABSTRACTTHETHESISCONTAINSTWOPARTS,IE,PART1MONTECARLOSIMULATIONSONELECTRONSSCATTERINGINAERONAUTICMETALMATERIALSANDPART2MDMOLECULARDYNAMICSSIMULATIONSOFTHEMECHANICALPROPERTIESOFCNTCARBONNANOTUBEANDCARBONNANOPEAPODSPART1MONTECARLOSIMULATIONSONELECTRONSSCATTERINGINAERONAUTICMETALMATERIALSAL,TI,ANDMGALLOYSHAVEMANYEXCELLENTPROPERTIES,SUCHASHIGHSTRENGTH,LIGHTWEIGHTANDANTICORROSION,ANDAREWIDELYUSEDINENGINEERINGSTRUCTURESOFAERONAUTICSCARBONNANOTUBE,COLLISION,CARBONPEAPOD,MULTIWALLED,SINGLEWALLED,MOLECULARDYNAMICS,NE

簡介：南京航空航天大學碩士學位論文航空高溫材料三維蠕變斷裂研究姓名于振波申請學位級別碩士專業(yè)工程力學指導教師郭萬林20090301航空高溫材料三維蠕變斷裂研究IIABSTRACTINAERONAUTICASTRONAUTICCHEMICALPOWERFIELDSMANYINDUSTRIALACCIDENTSHAVEBEENREPTEDONCOMPONENTS’FAILUREUNDERHIGHTEMPERATURESURVEYSINDICATEDTHATTHEFAILURESARECLOSELYCRELATEDWITHTHEDEFECTSFLAWSINTHECOMPONENTSMOSTOFTHEFAILURESRESULTEDINTHEGROWTHOFTHECREEPCRACKSINCE1970SWIDERESEARCHESHAVEBEENCONDUCTEDINTWODIMENSIONAL2DCREEPFRACTUREINTEGRATEDCRITERIONSWEREDEVELOPEDTOGUIDETHEDESIGNOFCOMPONENTSHOWEVERTHESTRONGTHREEDIMENSIONAL3DEFFECTSOFTENOCCURWHENTHEYAREAPPLIEDTOCOMPLEXSTRUCTURESALTHOUGHTHEREAREALOTOFNUMERICALEXPERIMENTALRESEARCHESON3DCREEPFRACTUREATHEETICALBASEISABSENTSOFARINTHEPRESENTTHESISWEFOCUSEDONTHETHEETICALNUMERICALRESEARCHESIN3DCREEPFRACTURETHEMAINCONTENTSAREASFOLLOWING1THEGENERALSINGULARITYSTRUCTUREOF3DCREEPCRACKBDERFIELDSISOBTAINEDWHICHISSUITABLETOBOTHSTRAIGHTCURVILINEARCRACKSTHEGOVERNINGEQUATIONOF3DCREEPCRACKISEXTRAPOLATEDSOLVEDEXACTLYTHERESULTSGIVETHESINGULARITYANGULARDISTRIBUTIONSOFTHESTRESSSTRAINRATEFIELDSWHICHAREAFFECTEDBYTHETRIAXIALSTRESSCONSTRAINTTZSTRONGLYAPROGRAMISWRITTENBYCLANGUAGEFTHESOLVINGPROCEDURE2UNDERREMOTEUNIFMTENSILELOADISOTROPICCREEPINGTHINPLATEWITHSINGLEEDGETHROUGHSTRAIGHTCRACKISINVESTIGATEDANALYZEDUSING3DFINITEELEMENTMETHODTHEDISTRIBUTIONSOFCINTEGRALTHETRIAXIALSTRESSCONSTRAINTFACTTZARESHOWNATWOPARAMETERCTZDEIONWHICHISMEEXACTACCURATEISPROPOSED3BASEDONTHETHEETICALNUMERICALSTUDIESABOVETHESTEADYSTATECREEPCRACKGROWTHOF3DISSTUDIEDPRIMARILYA3DTWOPARAMETERCRITERIONBCTISSUGGESTEDTOCONSIDERTHEEFFECTOFTRIAXIALSTRESSCONSTRAINTTZCOMPARISONOFTHEBCTPREDICTIONWITHTHEEXPERIMENTSDATAAFFIRMITSEFFECTIVITYKEYWDSCREEPFRACTUREMECHANICS3DCRACKBDERFIELDSTIAXIALSTRESSCONSTRAINTFACTTZSTEADYSTATECREEPCRACKGROWTHTWOPARAMETER3DCREEPFRACTURECRITERION

簡介：中國民航大學碩士學位論文航空AES數(shù)字接收機關(guān)鍵技術(shù)的研究與實現(xiàn)姓名姚彬申請學位級別碩士專業(yè)通信與信息系統(tǒng)指導教師吳志軍20070308中國民航大學碩士論文ABSTRACTTHESOFTWAREDEFINEDRADIOTECHNIQUEISAKINDOFNEW1CADINCOMMUNICATIONTECHNIQUECAUSEDTHETECHNICALINNOVATIONOFRECEIVERBYMEANSOFTHESOFTWAREDEFINEDRADIOS，ITISBETTERTOMAKETHEA／D、D／ACLOSERTOTHEANTENNA，ANDPROCESSINGTHESIGNALINTHEDIGITALDOMAINANYCOMMUNICATIONFUNCTIONWILLBEPERFORMEDINTHESALNEHARDWAREPLATFORMTEALIZEDIFFERENTFUNCTIONBYCHOOSEDIFFERENTBLOCKOFSORWARESOFTWAREDEFINEDRADIOCALLCOMMUNICATEWITHTHESTATIONOFOLDSYSTEMBECAUSEITCANFORMALLKINDSOFMODULATEUNDEEANDPROTOCOL，THISCANPROLONGTHECYCLEOFTHESTATIONANDSOREDUCETHECOSTSOTHESOFTWAREDEFINEDRADIOHASABRIGHTFOREGROUNDINTHECOMMUNICATIONFIELD，ESPECIALLYINTHEMOBILECOMMUNICATIONFIELDDUETOTHELIMITATIONOFDEVICELEVEL，ITISIMPOSSIBLETOSAMPLERFSIGNALSOITISAVALIDWAYTOSAMPLEIFSIGNALTEALIZETHESOFTWAREDEFINEDRADIECEIVERTHIS燁RFIRSTDISCUSSTHECOMPOSINGOFAVIATIONSYSTEMICFORINMARSATANDCHANNELTYPES，ANDANALYZESPECIALTYTHEBASEFRAMEWORKANDTHEKEYTECHNIQUESOFTHESOFTWAREDEFINEDRADIOCOMBININGPCHANNELPROPTECHNICALGUIDELINESANDRESEARCHINGONTHEPRACTICALAPPLICATIONSINIFDIGITALRECEIVERTHISPAPERPUTFORWARDAKINDOFBROADBANDIFDIGITALRECEIVERDESIGNOFTHEAVIATIONAESWITHTHESOFTWAREDEFINEDRADIOTHESTUDYOFTHISPAPERPLACESEMPHASISTWOKEYTECHNIQUESTHEBLOCKOFSIGNALPROCESSINGINTHEIFANDTHESYNCHRONIZATIONOFCARRIERTHESIGNALPROCESSINGINTHEIFGIVESSPECIALDETAILSOFALGORITHMANALYSISANDREALIZESTECHNIQUESINADCANDDDC，ANDCARRIERSYNCHRONIZATIONANALYSETHESYNCHRONIZATIONALGORITHMOFCARRIERFREQUENCYANDPHASEANDGIVETHEIMPLEMENTATIONINFPGA，INCLUDINGSTRUCTUREDIVISIONHARDWAREDESIGNANDLOGICSYNTHESISKEYWORDSSOFTWAREDEFMEDRADIO；DIOTALIF；ANALOGTODIGITALCONVERTER；DIGITALDOWNCONVERTER；CARRIERRECOVER；FIELDPROGRAMMABLEGATEARRAYⅡ

簡介：中國科學院空間科學與應(yīng)用研究中心碩士學位論文基于ARM的高性能航天計算機研究姓名鄧平科申請學位級別碩士專業(yè)計算機應(yīng)用技術(shù)指導教師林寶軍張善從20050101莖主壘墨絲墮苧絲絲墮墨笪墨塑塑塑AB8TRAOTDENGPINGKECOMPUTERAPPLICATIONDIRECTEDBYLINGBAOJUNZHANGSHANCONGWITHTHEDEVELOPMENTOFSMALLSATELLITETECHNOLOGY，MOREANDMOREFUNCTIONUNITSAREINCORPORATEDINTHEONBOARDCOMPUTERTHETRADITIONALMICROPROCESSORSCANNOTSATISF，THENEEDOFHIGHCAPACITIESOFONBOARDCOMPUTERSANEWGENERATIONOFONBOARDCOMPUTERWITHTHEARMMICROPROCESSORPRESENTEDINTHETHESISPROVIDESANEWWAYINTHISFIELDTHISTHESISPRESENTEDTHESCHEMEOFDESIGNINGTHEONBOARDCOMPUTERBASEDONTHEAR91R40005PROCESSOR，ANDSTUDIEDTHEFEASIBILITYANDSOMEDETAILSOFTHESCHEMESOMEIMPORTANTTECHNIQUESWEREDISCUSSEDACCORDINGTOTHERESULTSOFTHEEXPERIMENTS，THEFRUITSOFTHISPROJECTCANSARISFYTHEMISSIONOFTHESMALLSATELLITEITPROVIDESAGOODFOUNDATIONFORTHEONBOARDCOMPUTERWITHHIGHCREDIBILITYREDUNDANCYDESIGNANDPARALLELPROCESSINGABILITYOFTHEDESIGNEDCOMPUTERKEYWORDARM；ONBOARDCOMPUTEROBC1553BBUS

簡介：中圖分類號V5206R1441論文編號102871515－S029學科分類號082504碩士學位論文航天器介質(zhì)材料深層充放電效應(yīng)模擬分析研究研究生姓名強鵬學科、專業(yè)人機與環(huán)境工程（航天方向）研究方向空間環(huán)境與效應(yīng)指導教師魏志勇教授南京航空航天大學研究生院航天學院二О一五年三月NANJINGUNIVERSITYOFAERONAUTICSASTRONAUTICSTHEGRADUATESCHOOLCOLLEGEOFASTRONAUTICSANALYSISRESEARCHOFDEEPDIELECTRICGINGDISGINGINSPACECRAFTATHESISINMANMACHINEENVIRONMENTALENGINEERINGBYADVISEDBYSUBMITTEDINPARTIALFULFILLMENTOFTHEREQUIREMENTSFTHEDEGREEOFMASTEROFENGINEERINGDECEMBER2014

簡介：N77165G學校代碼10246學號022029015後里大學碩士學位論文利用仿真技術(shù)對振動環(huán)境試驗條件以及航天器展開部件地面動力學試驗的修正院專系力學與工程科學系業(yè)工程力學姓名蘇里指導老師唐國安教授完成日期2005年5月31日采麓瓣蠢勿全文公希“’ABSTRACTSOMEPHENOMENAOFCOMPLEXSTRUCTUREVIBRATIONFLEENOTWELLUNDERSTOODINTHEORY．NUMERICALMETHODSANDTESTTECHNIQUEHAVEMADEAGREATPROGRESS，BUTARENOTSUFFICIENT．INORDERTOGETRELIABLEANDREASONABLERESULTS，THEUNITEDAPPLICATIONOFTHETWOMEASURESISNECESSARYINTHEANALYSISOFENGINEERINGSTRUCTUREVIBRATION．THEAUTHORHASSTUDIEDTHERELATIVECASES，INCLUDINGANELASTICCOUPLEDSTRUCTURECONSTITUTEDBYTWOELASTICCOMPONENTSISDESIGNEDASTHETESTMODELS．THEMODELTESTSFORTHETWOCOMPONENTSAREPERFORMED．THEIRFEAMODELSARESETUPANDUPDATEDBYUSINGTHEMODELTESTDATA．THERESULTSOFCOUPLEDLOADEDANALYSISTHROUGHFREQUENCYRESPONSEFUNCTIONCALCULATEDBYTHEUPDATEDFEAMODELSAPPROACHTHERANDOMVIBRATIONTEST如LAASAWHOLE．SOTHEYARERELIABLETOACERTAINEXTENT．BUTTHECASETHATTHERESULTSOFPEAKVALUEINLOWFREQUENCYARENOTACCURATEINDICATEST11ATMORESTUDYFORDAMPINGESTIMATIONISNEEDED．THEVIBRATIONSIMULATIONANDTESTANALYSISOFTWOCOUPLEDSYSTEMSSHOWTHEPROBLEMOFOVERTESTINGINTHECONVENTIONALVIBRATIONTEST．CONSIDERINGTHEVIBRATIONCHARACTERISTICSOFCOUPLEDSYSTEMS，THECORRECTIONFORCONTROLSPECTRAOFVIBRATIONTESTISBASEDOILTHEINTERFACEACCELERATIONSATTAINEDBYCALCULATIONORMEASUREMENT，‘‘FORCELIMITED”TESTUSINGAWEIGHTEDAVERAGEOFSIGNALSCONTROLINACONVENTIONALVIBRATIONTESTCONTROLSYSTEMALLEVIATESTHEOVERTESTINGPROBLEMASSOCIATEDWITHVIBRATIONTESTUSINGONLYACCELERATIONCONTR01．THREEDIMENSIONALAIRFLOWFIELDINDUCEDBYTHESOLARCELLARRAYSDEPLOYMENTINGROUNDTESTISANALYZEDUSINGNUMERICALMETHOD，ANDTHENTHEADDEDMASSOFTHEAIRFLOWATTACHEDTOTHEARRAYISEVALUATED．SIMULATIONOFTHEARRAYDEPLOYMENTISOBTAINEDFROMTHESOLUTIONOFDYNAMICALEQUATIONS．THERESULTSSHOWTHATTHEDEPLOYMENTINTHEGROUNDSPENDSMORELONGTIMETHANITINVACUUMENVIRONMENT．ACCORDINGTOTHESIMULATION，CORRECTIONOFTHESOLARCELLARRAYSDEPLOYMENTTESTDATAINGROUNDWOULDBEREASONABLE．KEYWARDSVIBRATIONTEST，COUPLEDLOADANALYSIS，CONTROLSPECTRA，MODELTEST，MODELUPDATING，F(xiàn)REQUENCYRESPONSEFUNCTION,FORCELIMITEDVIBRATIONTEST，SOLARCELLARRAYS，ADDEDMASS，DYNAMICEQUATION

簡介：西北工業(yè)大學碩士學位論文航空典型結(jié)構(gòu)材料腐蝕行為與控制的研究姓名田莉莉申請學位級別碩士專業(yè)材料學指導教師劉道新20060301懋熬王鼗太學鞭士學位論文擒要舞蔥黼度爵嚏疆離簸臺耢攀在櫥媲除段豹蔽瀑速率，壤大穩(wěn)霸啜灄零。夜35℃～70。|C試驗溫發(fā)范圍內(nèi)，復臺張料的吸瀑特性遵從FICK定攆。在3S℃澄淡下燕熱簿黥瓣禱滲夫了簸合耪旗在襁貽滁段戇蹶漫遵率巍飽積暇滋搴，并盈藤藤瀚耷趣載薅熬大，復合稀瓣奩鞠戇除袋鶼啜淹速率穗這戮平掇辯鶼讖秘蔽滋攀越丈。河瓣，暖澄健復合襯褥的承裁熊力翳囂降低。關(guān)鍵溺摟憋褰鑣，不臻鑲，裔強浚鑲，怒舞懿畿鑲，鍰會壘，簸紓雄壤溪環(huán)氟復合櫥黼，敷漫，娥鑲，磷豫L

簡介：中圖分類號理2窆UDC68L碩士學位論文學校代碼Q§三三密級公玨航空發(fā)動機導流葉片導流角的測量與分析MEASUREMENTANDANALYSISOFAEROENGINEGUIDEVANE’SDIVERSIONANGLE作者姓名丁梓健學科專業(yè)控制科學與工程研究方向智能檢測學院系、所信息科學與工程學院指導教師魯五一教授副指導教師論文答辯日期蘭絲蘭』勺答辯委員會主席齜中南大學二零一四年五月航空發(fā)動機導流葉片導流角的測量與分析摘要飛機在飛行過程中的座艙抖動現(xiàn)象一直以來都是航空領(lǐng)域中復雜且容易引發(fā)事故的問題。研究表明航空發(fā)動機導流葉片的一致性對發(fā)動機的性能會產(chǎn)生重要的影響，是導致飛機座艙抖動的主要原因之一。當前，航空發(fā)動機檢修工廠對葉片一致性檢測方法落后，都是使用尺寸規(guī)手工對葉片進行測量。手工測量的系統(tǒng)誤差很大、精度不高。這為飛機的安全飛行埋下了隱患。為了準確地對葉片的一致性進行檢測，本文提出一種導流角離線測量方案。本文詳細介紹了喘振產(chǎn)生的原因和預(yù)防措施，分析了葉片一致性對喘振的影響，提出了改進的導流角測量方法，并設(shè)計了自動化檢測裝置。導流角測量方法首先對通過葉片實物測量得到的數(shù)據(jù)進行降噪處理，以排除噪聲點對后續(xù)工作的干擾，然后采用弦高差法精簡了數(shù)據(jù)中的冗余點，以提高重構(gòu)工作的效率，在此基礎(chǔ)之上運用切片技術(shù)，即采用一組平行平面與葉片的三維數(shù)據(jù)相切，得到了一系列的葉片截面輪廓數(shù)據(jù)，將上下表面的數(shù)據(jù)分離后，重構(gòu)了葉片的截面輪廓曲線，最后通過計算得到導流葉片的導流角。本文以測量得到的導流角數(shù)據(jù)為依據(jù)，對測量結(jié)果進行了對比，分析了各組數(shù)據(jù)的平均值和方差，提出了同一個葉片和葉片間一致性的判定方法。分析結(jié)果表明葉片的導流角測量方法是可行的，可以有效地提高測量的精度，且可以多次測量，從而很好的解決偶然性誤差對測量結(jié)果的影響，在理論研究的基礎(chǔ)上，開發(fā)了檢測系統(tǒng)軟件，最后在總結(jié)全文工作的基礎(chǔ)上，指出了有待進一步完成的工作。圖40幅，表19個，參考文獻50篇。關(guān)鍵詞喘振；導流葉片；導流角；曲線重構(gòu)；分類號TP29

簡介：號密級公玨學號絲SQ3Q212P鏟IZ7口?！恢袊裼煤娇諏W院碩士學位論文機器視覺在航空發(fā)動機內(nèi)窺檢測中的應(yīng)用研究研究生姓名工煎薟導師姓名翌云掛教援申請學位級別王堂亟所在院系扭童堂喧學科專業(yè)名稱昱熊劍昱皇撞割論文答辯日期2QQ生旦坦目2005年1月10曰中國民用航空學院碩L學位論文ABSTRACTINRECENTYEARS，COMPUTERVISIONTECHNOLOGYHASBEENGREATDEVELOPEDANDITALSOHASBEENANIMPORTANTRESEARCHSUBJECT。BYNOW，THETECHNIQUEOFHOLEDETECTIONISMATUREINIMAGECAPTURE，IMAGESHOW，ETCBUTHOLEDETECTIONDEVICEISFARFROMREACHINGTHEINTELLEGENTLEVEL，THEDETECTIONOFAVIATIONENGINEISBASELYBYHUMANEXPERIENCES，THEFAULTWASESTIMATEDSOTHEHUMANFACTORANDFAULTOFDETECTIONHAPPENED，ANDPEOPLECANNOTDOFAULTPREDICTION。THISSUBJECTISBASEDONTWINEYEVISIONPRICIPLE，ANDITWILLUSEIMAGEPROCESSINGTECHNIQUE，ANDGIVEGOODPARAMETERFSUCHASLENGTHOFCRACKLE，AREAOFERODE，SOITCANDOQUANTITIVEMEASUREMENT，ANDITALSOISTHEBASEWORKOFDEVELOPINGINTELLEGENTHOLEDETECTIONDEVICESOASTEALIZEINTELLIGENTOFFAULTDETECTIONTHISARTICLEWILLBUILDATWINEYECOMPUTERVISIONMODELOFPARALLELOPTICALAXIS，WEWILLADOPTAFLEXIBLEMETHODINCAMERACALIBREAIONWETESTTHEPRECISIONOFTHECALIBRATIONRESULTTHEINFLUENCEOFTHENOISEISDISPELLEDBYIMAGEPREDICTIONPROCESSING，EFFECTIVEAREAISENHANCEDWEALSOWI玨ANALIZEMEANFILTERANDMEDIANFILTER，ANDCOMPAREDIFFERENTIALOPERATOROFFRINGEDRAWINGTHEEFFECTIVEAREAISEXTRACED，THEAREAOFDAMAGEANDTHE3DCOORDINATESCANBECOMPUTEDBYSTEREOMATCH強EWHOLESYSTEMCALLBEDIVIDEINTOFOURPARTSIMAGECAPTURING。IMAGEPROCESSING，STEREOMATCHING，AND3DREBUILDINGTHISSUBJECTUSEDVEPROGRAMMINGLANGUAGETODEVELOPTHEMODULESATTHEENDOFTHISARTICLEWEINTRODUCEDTHESYSTEMPROGRAMMINGANDFUNCTIONS弱ERESEARCHOFTHESUBJECTCANDOSOMEGOODTHINGSTOIMPROVETHEHOLEDETECTIONTECHNIQUEANDTHEMODEMIZATIONOFCIVILAVIATIONKEYWORDSAVIATIONENGINEHOLEDETECTIONIMAGEPROCESSINGCOMPUTERVISIONL

簡介：南京航空航天大學碩士學位論文民用航空維修工程能力評估及輔助決策支持系統(tǒng)開發(fā)研究姓名王敬敏申請學位級別碩士專業(yè)交通信息工程及控制指導教師王華偉20090201民用航空維修工程能力評估及輔助決策支持系統(tǒng)開發(fā)研究IIABSTRACTTHEMAINTENANCEISTHEFOUNDATIONOFENSURINGTHEINHERENTRELIABILITYSAFEFLIGHTOFTHEAIRCRAFTWITHTHEEXPINGOFTHECIVILAVIATIONAIRCRAFTTHEAGGRAVATIONOFAGINGAIRPLANESTHEDEMINTHEAIRCRAFT’SMAINTENANCEMARKETISLARGERLARGERTHEMAINTENANCEENGINEERINGABILITYISTHEABILITYTOCOMPLETETHEREPAIRTASKOFTHEAIRCRAFTWHICHHAVESIGNIFICANTMEANINGINENSURINGTHESAFEFLIGHTOFTHEAIRCRAFTALONGWITHTHEADVANCEOFTHECOMMERCIALAVIATIONTHEGLOBALCOMPETITIONOFTHEMAINTENANCEINDUSTRYISPROGRESSINGFASTERITISNECESSARYTOMAKESATHOUGHFULLRANGEOFEVALUATIONOFTHEDEVELOPMENTLEVELOFTHECURRENTCIVILMAINTENANCEINDUSTRYTHISEVALUATIONNOTONLYPROVIDESTHEDATASUPPTFTHEGOVERNMENTTOMAKEMACROSCOPICPOLICYBUTALSOPROVIDESTHEBASISFTHEDOMESTICMAINTENANCEENTERPRISESTOMAKEDEVELOPMENTPLANSTHEPAPERPRESENTSTHERESEARCHOFCIVILAVIATIONMAINTENANCEENGINEERINGCAPABILITYEVALUATIONTHEPRIMARYWKINCLUDES1THECONSTRUCTIONOFEVALUABLETARGETSYSTEMFCIVILAVIATIONMAINTENANCEENGINEERINGCAPABILITYHASBEENESTABLISHEDBASEDONTHECONSTRUCTIONPRINCIPLEOFTHEINDICATSYSTEMCONSIDEREDFROMTHEHUMANRESOURCESTHESUBSTANCERESOURCESTHEINFMATIONTECHNOLOGYRESOURCESTHEMANAGEMENTRESOURCESASWELLASTHEMAINTENANCECATEGYTHISPAPERHASFMULATEDTHETARGETEVALUATIONCRITERIAWHICHLAIDTHEFOUNDATIONFADEEPERRESEARCHINTHEFUTURE2THEDATACLEANINGTECHNOLOGYPREPROCESSINGTECHNIQUESHASBEENSTUDIEDTHEQUALITYOFDATAUNIFICATIONOFTARGETINFLUENCETHERESULTRELIABILITYOFEVALUATIONBUTTHEDATACLEANINGTECHNOLOGYPREPROCESSINGTECHNIQUESGUARANTEEIT3THEGRACOMPREHENSIVEEVALUATIONMODELCOMBININGAHPDSEVIDENCETHEYWASCONSTRUCTEDCONSIDERINGTHEIMPACTOFTARGETWEIGHTONEVALUATIONTHEDSEVIDENCETHEYHELPEDTODEPRESSTHEUNCERTAINTYOFTHETARGETWEIGHTBASEDONAHPAFTERWARDSTHEGREYRELATIONALCOMPREHENSIVEEVALUATIONMETHODWASUSEDTOCLEARTHEDIFFERENCESBETWEENTHEEVALUATIONOBJECTTHEREFERENCEOBJECTASWELLASROOMNEEDTOBEIMPROVED4ESTABLISHEDEVALUATIONSYSTEMOFMAINTENANCEMANAGEMENTWITHACEOFMAINTENANCEENGINEERINGCAPABILITYEVALUATIONTHEEXAMPLESHOWEDTHECOMPREHENSIVEEVALUATIONMODELISEFFECTIVEBASEDONTHEBSSTRUCTURETHISSYSTEMCREATEDTARGETSYSTEMDYNAMICREFLECTEDTHECONDITIONITSELFINTIMETHESYSTEMCANBEEXPEDTOOTHEREVALUATIONFIELDKEYWDMAINTENANCEENGINEERINGCAPABILITYDATACLEANINGTECHNOLOGYANALYTICHIERARCHYPROCESSDSEVIDENCETHEYGREYRELATIONALANALYSISEVALUATIONSYSTEM