簡介：華中科技大學碩士學位論文針對航天繼電器電弧的輸運系數(shù)理論計算與輸運特性研究姓名鮑明暉申請學位級別碩士專業(yè)高電壓與絕緣技術指導教師何俊佳20070601IIABSTRACTAEROSPACERELAYISONEOFTHEMOSTACCESSIESINVARIOUSDEEPEXPLINGAEROCRAFTARCWILLHAPPENWHENTHERELAYCONTACTSBREAKCLOSEWHICHCANMAKETHECONTACTWKINGCONDITIONBADINFLUENCETHEWKINGLIFERELIABILITYOFAEROSPACERELAYBADLYTHEREFEITISIMPTANTTODOSOMERESEARCHONTHEARCACTERISTICOFAEROSPACERELAYFIMPROVINGITSWKINGLIFERELIABILITYARCPHENOMENONISATRADITIONPROBLEMRESEARCHERSINOURCOUNTRYABROADHAVEDONEMUCHWKONITHOWEVERMOSTOFTHEIRWKAREFROMMACROSCOPICPOINTWHILEFEWISFROMMICROSCOPICPOINTINTHISPAPERAIMDATTHEARCPHENOMENONOFAEROSPACERELAYFROMMICROSCOPICPOINTBASEDONTHEBASICTHEYOFTRANSPTPROPERTIESSIMPLIFIEDTHEDISTRIBUTINGFUNCTIONTHECOLLISIONTERMOFTHEBOLTZMANNFUNCTIONCOMBINEDTHEDEFINITIONOFTRANSPTCOEFFICIENTSBOLTZMANNFUNCTIONSIMPLIFIEDCALCULATIONFMULASOFTRANSPTCOEFFICIENTSAREDERIVEDTHENSIMPLIFYTHECALCULATIONINMIXTURESBYMIXTURERULESBYTHISCALCULATIONMETHODTHETRANSPTCOEFFICIENTSINNITROGENISCALCULATEDWITHDIFFERENTPRESSURESMETALVAPPROPTIONSASWELLASINPUREMETALVAPWITHDIFFERENTPRESSURESTHERESULTINDICATESTHATTHEINFLUENCESOFTHESEFACTSTOTRANSPTPROPERTIESAREWELLREGULATEDTHECONCLUSIONSINTHISPAPERDOBASICWKFTHEFURTHERRESEARCHOFTRANSPTPROPERTIESMACROPROPERTIESOFTHEARCINAEROSPACERELAYKEYWDSARCTRANSPTCOEFFICIENTSTRANSPTPROPERTIESRELAY

簡介：西安電子科技大學學位論文獨創(chuàng)性或創(chuàng)新性聲明秉承學校嚴謹?shù)膶W風和優(yōu)良的科學道德，本人聲明所呈交的論文是我個人在導師指導下進行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標注和致謝中所羅列的內容以外，論文中不包含其他人已經發(fā)表或撰寫過的研究成果；也不包含為獲得西安電子科技大學或其它教育機構的學位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻均已在論文中做了明確的說明并表示了謝意。申請學位論文與資料若有不實之處，本人承擔一切的法律責任。本人簽名蘭逝日期迦蘭2』西安電子科技大學關于論文使用授權的說明本人完全了解西安電子科技大學有關保留和使用學位論文的規(guī)定，即研究生在校攻讀學位期間論文工作的知識產權單位屬西安電子科技大學。學校有權保留送交論文的復印件，允許查閱和借閱論文；學?？梢怨颊撐牡娜炕虿糠謨热?，可以允許采用影印、縮印或其它復制手段保存論文。同時本人保證，畢業(yè)后結合學位論文研究課題再撰寫的文章一律署名單位為西安電子科技大學。本人簽名至逝導師簽名牲日期趁絲2』技術；在ANSYSWORKBENCH中快速的模擬了國軍標規(guī)定的隨機振動環(huán)境和沖擊振動環(huán)境；對縮減機箱模型進行了模態(tài)分析、隨機振動分析、沖擊響應分析，獲得了結構的固有特性及振動響應特性。經過論證，發(fā)現(xiàn)分析結果與實際情況大致相符，從而表明本文的工作是有效的。關鍵詞有限元分析ANSYSWORKBENCH有限元建模模態(tài)分析隨機振動分析沖擊振動分析

簡介：基于離散頻譜的L波段數(shù)字航空通信系統(tǒng)資源分配研究重慶大學博士學位論文學生姓名黃杰指導教師曾孝平教授專業(yè)通信與信息系統(tǒng)學科門類工學重慶大學通信工程學院二O一七年四月STUDYONRESOURCEALLOCATIONINNONCONTINUOUSSPECTRUMFLBDIGITALAERONAUTICALCOMMUNICATIONSYSTEMATHESISSUBMITTEDTOCHONGQINGUNIVERSITYINPARTIALFULFILLMENTOFTHEREQUIREMENTFTHEDOCT’SDEGREEOFENGINEERINGBYHUANGJIESUPERVISEDBYPROFZENGXIAOPINGSPECIALTYCOMMUNICATIONINFMATIONSYSTEMCOLLEGEOFCOMMUNICATIONENGINEERINGOFCHONGQINGUNIVERSITYCHONGQINGCHINAAPRIL2017

簡介：航天器這類大型系統(tǒng)的復雜性與實時診斷的需求是兩個互相制約的問題。探求一種有效的智能化的航天器故障診斷方法，解決復雜系統(tǒng)故障診斷的分離算法計算量大、計算時間長等難題，能夠實現(xiàn)航天器的自主化，保障航天器的高可靠、長壽命運行。本學位論文以國防“十五”預研項目（02413200204242）“衛(wèi)星長壽命高可靠性技術”為研究背景，為提高日益復雜的航天器系統(tǒng)的故障診斷能力，研究了適合于航天器不同系統(tǒng)的層次診斷模型，并詳細討論了各層次模型的構建技術及診斷算法。系統(tǒng)地研究了結構抽象和行為抽象技術。充分利用航天器在組成單元上的天然分層結構，利用抽象技術建立層次診斷模型，實現(xiàn)復雜系統(tǒng)的結構簡化。當已知系統(tǒng)的先驗概率時，采用高效的拉格朗日松弛和啟發(fā)式算法，并結合傳播強度法來共同實現(xiàn)多故障診斷；當系統(tǒng)的先驗概率未知時，提出用與系統(tǒng)領域相關的方程組成的約束集進行一致性分析的方法來進行診斷，并在診斷推理時引入定量知識，從而實現(xiàn)故障的精確定位。根據(jù)衛(wèi)星熱控系統(tǒng)的特點，提出把基于圖論的故障診斷技術引入到結構抽象技術中來，構建了某衛(wèi)星熱控系統(tǒng)層次診斷模型。研究了基于功能單元的抽象技術，詳細介紹了功能單元的描述及功能單元抽象的基本規(guī)則。深入探討了用于診斷推理的三類基本定理，并提出了新穎的診斷推理策略，給出了診斷推理步驟。針對衛(wèi)星電源系統(tǒng)具有某種流動介質或者可以稱為一種廣義流的特點，構建了某衛(wèi)星電源系統(tǒng)的基于功能單元的層次診斷模型（SPS樹）研究了以系統(tǒng)辨識為工具進行行為抽象進而建立層次模型的建模技術。針對傳統(tǒng)基于參數(shù)估計的故障診斷技術存在的弊端，提出了一種新診斷思路。詳細地介紹了抽象樹的建立準則，系統(tǒng)地研究了采用的行為抽象法BOXJENKINS建模法所包含的四項基本技術，對其中的一項關鍵技術參數(shù)估計采用了一種新的不對稱動態(tài)數(shù)據(jù)窗的方法。對某衛(wèi)星進行了應用仿真。針對分布式應用對象，研究了一種基于語言抽象的分布式層次診斷模型。詳細地介紹了規(guī)則語言的數(shù)學基礎語言和相關工具的定義。深入地研究了全局一致性的分布式診斷技術及多步分辨診斷（MULTIRESOLUTIONDIAGNOSIS）的計算方法。提出了由下至上構建層次模型結構，由上至下進行分層計算的策略。建立了某衛(wèi)星測控系統(tǒng)的分布式層次診斷模型。以“風云一號”衛(wèi)星為應用背景，開發(fā)了衛(wèi)星及診斷平臺。論述了軟件系統(tǒng)設計原則及基本設計思想，平臺以層次模型故障診斷理論為基礎，并結合模糊推理及專家系統(tǒng)診斷實現(xiàn)了三種方法的相互配合診斷。

簡介：西北工業(yè)大學碩士學位論文基于星光折射航天器自主軌道確定姓名唐瓊申請學位級別碩士專業(yè)飛行器設計指導教師袁建平20070301西北工業(yè)大學碩上學位論文ABSTRACTW池THEDEVELOPPINGOFDEEPSPACEEXPLORATIONALLDMALLNEDSPACECRARTECKLOLOGY，THESTUDYOFTHEAUTONOMOUSNAVIGATIONFORSPACECM丘B(yǎng)ECOMESAHOTSPOTINA11DABROAD111ISPAPERDESCRIBESAILA11ALYSIS0F趴AUTONOMOUSILAVIGATORUSINGRE行ACTIONMEASU崩NENTSOFS協(xié)RLI曲TPASSINGMROUGLLTHEUPPERA餉OSPHERETHEMAINWORKINTHEPAPERIS髂FOLLOWSI、SPACECRMMODELINGSTUDYASFORTILEEANH耐ENTCD廿HEEA【ISSTABILIZEDSATEILITE，APRECISEORBITDYNAMICSMODELISESTABLISHEDINTTLEGEOCEMRICEQUATORIALINEMALCOOFDINATE，CONSIDERINGTHEINFLUENCEOFTHEPERTURB撕ONDUETOMEEARTLLSH印E，THESULL一M00NGMVI詛TIONA11DT11ESILLLLI曲TPRESSUREBASEDON山EPRECISEORBITDYNAMICSMODEL，THESTATE如NCTIONOFSPACECRAFTAMONOMOUSNAVIGATIONSYSTE珊ISESTABLISHED2、SPACECRAFTAUTONOMOUSNAVIGATIONTECHNOLOGYBASEDONTHESTELLAR耐ACTIONIS咖DMUSINGTHEOBSEⅣATIONI廊RNLATIONMEASUREDBYCCDSTARSENSORSANDTHESTARCATALOGSAVED，THESTELLARREFRACTIONANGLEISDETEMLINEDB嬲EDONTHEOBSERVATION如NCTION，MEPOSITIONAILDVELOCITYOFTLLESPACECRAFTAREDETE珊INATEDBYMEEKFANDUKFANDCOMPARCWITHTHEDIFFERENTOFTHEOBSEN，ATION內NCTIONS3、THCFACTOFSOFDETEMININGORBITPRECISION瓣STUDIEDTHEIIMITEDCONDITIONOFSELECTINGTHESTARISDISCUSSEDFURNLERMORE，MEEFFECTSOF齜ATMOSPHEDCREFACTIONMODEL，THEFILTERINGAIGORITTLMOFILAVIGATION，MESTARSEMORPRECISION，S鋤PLEPERIOD，ANDSI曲TINGSTARN岫BERSONDETERNLININGORBITPRECISIONARESTILDIED，A11DSIMULATEONCOMPMERKEYWORDSAUTONOMOUSNAVIGATION，STEILARREFRACTION，CCDSTARSENSOR，EXTENDEDKALMAILFILIERUNSCENTEDKALMALLFILTERII

簡介：南京航空航天大學碩士學位論文航空公司飛機恢復系統(tǒng)問題初步研究姓名柏強申請學位級別碩士專業(yè)交通運輸規(guī)劃與管理指導教師胡明華20060101航空公司飛機恢復問題初步研究IIABSTRACTAIRLINESARECONSTANTLYFACEDWITHDISRUPTIONPROBLEMSANDCANNOTEXECUTETHEIRSCHEDULESASPLANNEDBECAUSEOFSEVEREWEATHERPATTERNS,UNEXPECTEDAIRCRAFTMECHANICALFAILURES,CONGESTIONATAIRPORTETCWHENADISRUPTIONOCCURS,THEAIRLINEHAVETORESCHEDULEFLIGHTLEGS,NEEDAPOLICYTODECIDEWHICHFLIGHTLEGSNEEDTOBEDELAYEDANDWHICHONESNEEDTOBECANCELLED,ANDREROUTETHEAIRCRAFTS,CREWS,ANDPASSENGERSTHISPAPERSUMMARIZEDTHESOLUTIONSCURRENTLYADOPTEDBYAIRLINESUNDERTHECIRCUMSTANCESOFINTERRUPTIONSAFTERFULLYMASTERINGTHECOREBUSINESSOFTHEMOSTIMPORTANTDEPARTMENTOFAIRLINESAOCAFTERWARDS,SEVERALEXISTINGMODELSOFAIRLINESRECOVERYWEREREVIEWEDANDTHEAIRLINESINTEGRATEDRECOVERYMODELWASINTRODUCEDINDETAILSTHEAIRCRAFTRECOVERYMODELWITHTHEINTENTIONOFMINIMIZINGAIRLINESOPERATINGCOSTWASRESEARCHEDINDEPTH,INCLUDINGESTABLISHMENTOFTHEMODELANDTHECORRESPONDINGALGORITHMTHESOLUTIONTOTHEAIRCRAFTRECOVERYPROBLEMWASPROPOSEDANDAHEURISTICALGORITHMWASPUTFORWARDTOENGAGECERTAINAIRCRAFTSINTHEREROUTINGCALCULATIONACCORDINGTOTHEDIFFERENTKINDSOFINTERRUPTIONSFINALLY,BASEDONTHEABOVEAIRCRAFTRECOVERYSOLUTION,ADECISIONSUPPORTTOOLOFAIRCRAFTRECOVERYWASDEVELOPEDBYUTILIZINGOFCOMPUTERDEVELOPINGTOOLS,WHICHONTHEOTHERHANDVERIFIEDTHEAIRCRAFTRECOVERYMODELKEYWORDSAIRLINEIRREGULAROPERATION,AIRLINERECOVERYPROBLEM,AIRCRAFTRECOVERY,OPTIMIZATIONMODEL

簡介：中圖分類號V214論文編號102870113S049學科分類號080104碩士學位論文航空結構關鍵部位損傷識別方法研究研究生姓名金培學科、專業(yè)工程力學研究方向結構健康監(jiān)測指導教師周麗教授南京航空航天大學研究生院航空宇航學院二○一三年三月NANJINGUNIVERSITYOFAERONAUTICSANDASTRONAUTICSTHEGRADUATESCHOOLCOLLEGEOFAEROSPACEENGINEERINGRESEARCHONDAMAGEDETECTIONMETHODSFORAEROSPACESTRUCTURALHOTSPOTSATHESISINENGINEERINGMECHANICSBYJINPEIADVISEDBYPROFZHOULISUBMITTEDINPARTIALFULFILLMENTOFTHEREQUIREMENTSFORTHEDEGREEOFMASTEROFENGINEERINGDECEMBER,2012

簡介：分類弓V23題目學佼代碼10699研究生學號046076382西北工業(yè)大學碩士學位論文學位研究生作者趔D態(tài)學科專業(yè)控劍堡途皇控劍工猩指導教師楚工2007年3月西北工業(yè)大學碩士學位論文英文摘要ABSTRACTTHEHI咖DUTY觚LCOOLEDOILTESTBEDISANIMPONARLTEQUIPMENTFORTLI舟D啊MELCOOLEDOILCOOLERTOBEIILSPECTEDANDRESEARCHEDINORDERTOI11SDECTCOOLERMORCQUICKLYAILDSAFCLY，ANDALSOIMPROVCCOQORATION’SECONOMICBENE矗TS，N，SNECESSAN，TODESIGNMELLI曲DUTY如E1COOLEDOILTESTBEDTILATCON打01WITHTHCCOM口UTERFIRSTLY’THISPAPERIN仃ODUCESMEDEVELOPMENTOFCOMPUTERCON仃OLTHEORY徹DT11ETESTINGPROCESSOFLLIGHDMY如ELCOOLEDOILCOOLERACCORDINGTOTHEREQUESTFORTESTING，MESCHEMEOFTESTBEDISPRESENTSECONDLY，BASEDONTHE鋤LYSISOFSYSTEM’SJ1ARD啪RE，NLEP印ER丘NISHEDT王LEDESIGLLOFTHISSYSTEM’SHARD呲AILDAISOSEIEC倒APP跏CUSTHJRDLY，HOWTODES咖111IS螂BED’SSORWAREARCINTRODUCEDFINALLY，APIDCONTROLLERFORTEMPERATUREISDESIGNED觚DSIMUIATEDASTILDYONYSTEMCOMMISSIONINGISPRESEMEDATJASTIN協(xié)EANICLETHEPRACTICALSHOWSTHATTHESYSTCMDESIGNISFCASIBLEAILDREACHESTTLEREQUIREMENTSPRESET【KEYWORD】HIGHDUTY舭LCOOLEDOILC00IERVISUALB∞ICTESLBEDCOMPUTERC0NTROLDALAB船EN

簡介：西北工業(yè)大學碩士學位論文光纖通道在航空計算領域的研究和應用姓名宋少峰申請學位級別碩士專業(yè)計算機科學與技術指導教師張延園20070301ABSTRACTW汕T11EDEVELOPMENTOFAVIOTRONICS，WENEEDHI曲ERDATA一柵1SMITSPEEDINAYIONICSCOMPUTEFIELDATT11ES鋤ETIME，AGRCATDEALDATASHOLLLDBETRANSMINEDAMONGONBOARDELECTRONICSEQUIPMENTINCOMPLEXNETWORKENVIRONMENT；BOWEVER，TRADITIONALONBOARDNETWORKSYSTEMCAILNOTAFRORDTHATNEWMATERIALANDPROTOCOLARENEEDEDDATACANBCT啪SMITCEDAT齜SPEEDOFGB№INFIBRE礬ATISMORE，F(xiàn)IBRCHASTHEABIL畸OFANTIJ鋤MINGA11DBITEHDRRATELLLLDER10叫2，W11ICHPROVIDESHI曲RELIABILITY10WLATENCY，“GHISPEEDCOMMUNICATIONSOLUTIONT11ISPAPERIN打ODUCESTHEDEVELOPMENTHISTORYOFAVIOILICSNE柳OTI【INGTECLLILOLOGY，∞SEARCHESFIBRECHANNELTECHNOLOGY’DISCUSSESUPPERM印PINGPROTOCOLOFFIBRECHANNELIN耐ONICSENVIROMENT，ANDPROPOSESAILIMPLEMENTEDMC也ODOFFCLP助RECHANNEL1IGHT、ⅣEIGHTPMTOC01BECAUSEOFTHEREQUIREMEMFORHI曲RELIABILI饑LOWLATENCYANDHI曲SPEEDINAVIONJCSENVIRONMENT，WESIMPIIFIEDSCSICO咖ANDSA11DREDUCETHEHEADEROFDATA矗跏ETHETRAILSMITSPEEDISIINPROVEDTHEN，THEPAPERPROPOSEST11EDESIGLLANDHPLEMEMAT王ONOFTASKN1卸AG鋤EMWEDESIGNTLLREEQUEUESTOMANAGEDI臟RCNTTASKS，W11ICHWILLENSURCEVERYTASK1111DERCONTR01PRIORITYMECHANISMANDMILLISECONDOVEMMESYSTEMARCADOPTEDTOENSURERCALTIⅡLEP髓FBRNLANCEWEUSEDI恐REMPRIORITIESTODIS廿NGUISHTHEIINPORTANCEOFDI彘RENTDATA，AND“CTOVENIMESYSTEMTOENSLLRETASKSTOBEFINISHEDINSPECIFICALLYPERIODMEALL、，HILE，MTLLTISTATECHANNEL，INTE舒ATEDS詛1【ETRANSITIONPLALLATLDSYNCHRONOUS／ASYNCHRONOUSMODELAREDESI911EDTOIMPROVERCLIABILI可ANDNEXIBILI夠FINALLY，WETESTTHESYSTEM’SRELIA_BILITYANDCOMMUNICATIONPERFBRMANCEARERALONGTIMETEST，TLLERESULTSHOWSTLLATMESYSTEMMEETSRCQLLIREMENTSOFAVIONICSENVIM工LIILENTBO血INREALTIMEANDRELIABILITYFCLPSYSTEMISIMPORTAMTESEARCHNEXTGENERATIONA、，IONICSCOMMUNICATIONSYSTEMKEYWORDSAVIONICS，F(xiàn)C，F(xiàn)CLP，EMBEDDED，REALTIME，RELIABILITYII

簡介：匠兩L⑧目MR镕一M★天洋大尊TIANJLNUNVERSITY碩士學位論文學科專業(yè)絲蘭王莖作者姓名型盍擅指導教師苤擔盎塾撞天津大學研究生院2006年1月ABSTRACTCFITICFLTEMPERATURESANDPRESSURESOFFUELSAREIMPORTANTPARAMETERSFURRATINGOFMERITWHICHDEFINETHEPHASEBEHAVIORS，PERFORMANCEANDTEMPERATURERANGEOFFUELSAPPLIEDINTHEAIRPLANESANDHYPERSONICAIRCRAFTSINADDITIONTHEYAREVERYUSEFULINTHEINVESTIGATIONOFTHETHERMALDEGRADATIONORAGGREGATIONANDCARBONDEPOSITUNDERSUBSUPERERITICALCONDITIONSOFFUELSITISGENERALLYDIFFICULTTOMEASURETHECRITICALDATAOFFUELSDUETOITSCOMPLEXCOMPOSITIONUNSTABLEFEATURESANDHIGHERCRITICALVALUESINTHISTHESIS，VARIOUSEXPERIMENTALMETHODSANDTHEORYTODETERMINECRITICALPROPERTIESOFSUBSTANCEWEREINTRODUCEDONELOWRESIDENCETIMEFLOWEQUIPMENTFORTHEMEAGUREMEMOFTHECRITICALTEMPERATURESANDPRESSURESOFTHERMALUNSTABLEFLUIDSWAGDESIGNEDITIMPROVEDTHEORGMALMETHODSANDENLARGEDTHERANGEOFTEMPERATURESANDPRESSURESMEAGUREZL_，WITLLTHETESTEDTEMPERATUREAS0500。CANDTESTEXLPRESSURE雒05MPNPENTANE、NHEXANE、CYCLOHEXANEANDNDECANEWEREUSED嬲STANDARDREAGENTSTOCHEEKTHERELIABILITYOFTHEAPPARATUSTHEMAXIMUMDEVIATIONOFTEMPERATUREANDPRESSURESARE028。CANDO006MPARESPECTIVELYTHESERESULTSFULLYPROVETHATTHEAPPARATUSISRELIABLETODETERMINETHECRITICALDATAOFTHERMALUNSTABLEFLMDSTHECRITICALTEMPERATURESANDPRESSURESOFTWOENDOTHERMICHYDROCARBONFUELSRP3ANDSIMULATEJP7，ONEHIGLLENERGYFUELSJP10ANDMIXTURESOFJPLOWI也METHYLEYCLOHEXANEMC聊WEREDETERMINEDFORTHEFIRSTTIMEINADDITIONTHECRITICALDATAOFENDOTHERMIEAVIATIONFUELSOFRP3ANDSIMULATEJP7WEREESTIMATEDUSING6METHODSTHETEMPERATUREDEVIATIONWAGLESSTHAN6630C，ANDTHEPRESSUREDEVIATIONSAMONGESTIMATEDMETHODSHOWEVERCALLBEASMUCH硒O828MPATHEMAXILNUNLRELATIVEERTOROFTEMPERATURESANDPRESSURESWERE167％AND384％，RESPECTIVELYTHEAPIMETHODS，ANDRIAZIANDDANBERTCORRELATIONARERELATIVELYRELIABLEANEWMETHODTODETERMINETHECRITICALDATAUSINGHIGHPRESSUREDIFFERENTIALSCANNINGCALORIMETRYWAGPROPOSED，WHICHCANINFERREDTHECRITICALTEMPERATURESANDPRESSURESFROMVARIOUSDSCCURVESUNDERDIFFERENCESMEASURINGPRESSURETHECRITICALDATAOFNPENTANEANDJP10WEREOBTAINEDFROMTHISMETHOD，THERESULTSWERE19760CAND337MPA4238。CAND360MP丑RESPECTIVELYTHERESULTSWEREINGOODAGREEMEMWITHTHEPUBLISHEDDATAINDICATINGTHATTHISMETHODISRELIABLEINPRACTICAL

簡介：南京航空航天大學碩士學位論文航空發(fā)動機混疊振動信號的盲源分離研究姓名陽平申請學位級別碩士專業(yè)航空宇航推進理論與工程指導教師李舜酩20080101航空發(fā)動機混疊振動信號的盲源分離研究IIABSTRACTMODERNSIGNALPROCESSINGMETHODSCAN’TSEPARATETHECOMPLICATEDMULTIMIXEDVIBRATIONSIGNALSEFFECTIVELYWITHOUTANYPREINFMATIONASONEOFTHEHOTTESTMOSTEXCITINGTOPICSINTHEFIELDSOFSIGNALPROCESSINGATPRESENTBLINDSOURCESEPATIONBSSISPAIEDATTENTIONFSOLVINGTHISPROBLEMBUTTHERESEARCHESAREMOSTLYABOUTTHETHEYSIMULATIONLITTLEININTHEREALSIGNALAPPLICATIONTHEMAJWKOFTHISPAPERISTORESEARCHTHEEXISTINGMETHODSOFBSSTHENGETSOMEIMPROVEDMETHODSFITTEDFSEPARATINGTHEVIBRATIONSIGNALSWHICHWILLPROVIDEANEWWAYFTHESTATESTIRINGDIAGNOSISOFAIRCRAFTENGINESTHESPECIFICWKASFLOWERING1ANALYSEDEXPLAINEDTHEINDEPENDENTCOMPONENTANALYSISICATHEYALGITHMINDETAILGAVETHECLASSOFCEFUNCTIONAWAYOFITSION2PROPOSEDANIMPROVEDALGITHMCALLEDICAWITHREFERENCEICARWHICHISCOMBINEDWITHACTERSOFTHEVIBRATIONSIGNALTOPURSUITTHEEXPECTEDONETHROUGHSIMULATIONANALYSISTHISTECHNIQUEHASNOTONLYMESEPARATINGPRECISIONBUTALSOFASTERCONVERGENCETHANTRADITIONALMETHODS3ANALYSEDSTSOFVIBRATIONEXPERIMENTSUSINGBSSACHIEVEDSOMEAVAILABLECONCLUSIONSADAPTIVEMETHODSWHICHWASSUCCESSFULTOCONFIRMTHEVALIDITYOFBSSAPPLIEDTOSEPARATINGVIBRATIONSIGNAL4ABSSPACKAGEUSINGMATLABVCSOFTWARESWASDESIGNEDBASEDONTHETHEYOFSETTINGPARAMETERSTHISPACKAGEMADETHEOPERATIONOFBSSSIMULATIONSAPPLICATIONSCONVENIENTLYUNDERAGRAPHICALINTERFACESCONTROLKEYWDSBLINDSOURCESEPARATIONBSSVIBRATIONSIGNALCEFUNCTIONINDEPENDENTCOMPONENTANALYSISWITHREFERENCEICARBSSPACKAGE

簡介：分類號密級UDC編號專業(yè)碩士學位論文（工程碩士）航空用可快拆蜂窩夾層艙門強度等效模型研究碩士研究生劉祥指導教師陳東良副教授企業(yè)導師季寶鋒工程師工程領域機械工程論文主審人王茁教授哈爾濱工程大學2014年5月分類號密級UDC編號專業(yè)碩士學位論文（工程碩士）航空用可快拆蜂窩夾層艙門強度等效模型研究碩士研究生碩士研究生劉祥指導教師指導教師陳東良副教授學位級別學位級別工程碩士工程領域工程領域機械工程所在單位所在單位機電工程學院論文提交日期論文提交日期2014年5月論文答辯日期論文答辯日期2014年6月學位授予單位學位授予單位哈爾濱工程大學

簡介：上海交通大學碩士學位論文航空發(fā)動機變比熱容熱力計算和系統(tǒng)級仿真研究姓名韋福申請學位級別碩士專業(yè)航空宇航推進理論與工程指導教師杜朝輝20060201上海交通大學碩士論文摘要II和組分燃氣的復雜函數(shù)其中壓力對比熱容的影響很小氣體經過燃燒室和燃油混合燃燒后生成的燃氣由多種不同性質的物質組成而且隨著余氣系數(shù)不同其成分及比例不同物性也不一樣如果都考慮每種氣體的比熱容就會給計算帶來困難為了計算方便將系統(tǒng)的工質分為空氣和純燃氣由燃料與理論空氣量完全燃燒而成的的混合分別考慮他們的比熱容如果是燃燒室前的模塊比如進氣道壓氣機等可把其工質看成燃氣為零的混合氣體純空氣一般的比熱容是按照空氣和純燃氣的比熱容根據(jù)質量分數(shù)關系線性組合而成的然后對每一模塊建立變比熱容的數(shù)學計算模型同時以單軸渦輪噴氣式發(fā)動機為算例進行計算仿真跟用軟件GASTURB和定比熱計算的結果相比較證明變比熱的計算結果合理性和更接近物理實際以及有推廣應用的價值最后利用已有的模塊庫對常見的發(fā)動機系統(tǒng)比如渦輪噴氣渦輪軸渦輪螺漿渦輪風扇等進行系統(tǒng)建模仿真并對它們進行設計點和非設計點的熱力計算非設計點仿真計算包括速度特性高度特性和節(jié)流特性的計算還有過渡工作狀態(tài)比如啟動加速減速接通加力與斷開加力等仿真從計算結果的分析和與GASTURB的計算相比較中可以看出利用MODELICADYMOLA進行建模仿真的方法具有有效性通用性合理性可行性和便捷性等關鍵詞航空發(fā)動機模塊化建模變比熱容仿真DYMOLAMODELICA

簡介：南京航空航天大學碩士學位論文XRF和顯微圖像技術在航空發(fā)動機智能監(jiān)測中的綜合應用姓名羅鋒申請學位級別碩士專業(yè)載運工具運用工程指導教師李艷軍20090101XRF和顯微圖像技術在航空發(fā)動機智能監(jiān)測中的綜合應用IIABSTRACTAEROENGINESUPPLIESTHEMAJORMOTIVEPOWERTOTHEMODERNAIRCRAFT,SOTHESTATUSINSPECTIONOFTHEAEROENGINEOPERATIONPLAYSUNDOUBTEDLYANIMPORTANTROLEACCORDINGTODIFFERENTOBJECTS,THECONCLUSIONOFFUSEINGSEVERALDIFFERENTMONITORINGMEANSISMOREACCURATELYTHISPAPERBEASEDONXRFXRAYFLUORESCENCETECHNOLOGYANDINTRODUCINGARTIFICIALNEURALNETWORK,GRAYSYSTEMTHEORY,PROBABILITYSTATISTICS,DEMPSTERSHAFEREVIDENTIALTHEORYANDOTHERINTELLIGENTCALCULATION，INORDERTODEVELOPAINTELLIGENTMONITORINGSYSTEMXRFXRAYFLUORESCENCETECHNOLOGY,USINGISOTOPERADIOACTIVESOURCESTOERADIATEMATERIALSWHICHTOBEMEASURED,PRODUCESENERGYSPECTRUMTHROUGHASERIESOFINSTALLATIONS,WHICHISUSEDTODETERMINETHEELEMENTALMATERIALCATEGORIESMICROSCOPICIMAGETECHNIQUEWHICHWITHTHEFUNCTIONSOFPARTICLECOUNTERANDFERROGRAPH,ACHIEVEDTHEDIAGNOSISONTHEAEROENGINEWEARFAULTSBYUSEINGMCROSCOPICOPTICALIMAGINGSYSTEMANDDIGITALIMAGEPROCESSINGMETHODTHERESEARCHWORKMAINLYINCLUDESTHEFOLLOWINGTHREEASPECTSFIRSTLY,PROCESSEDXRFENERGYSPECTRUMANDOUTPUTTEDTHEELEMENTCONCENTRATIONSRESEARCHEDTHEMETHORDOFCALCULATINGTHETHRESHOLDVALUEOFTHECONCENTRATIONOFTHEWEARDEBRISANDFORECASTEDTHEWEARFAULTBYGREYPREDICTIONSECONDLY,BASEDONTHENUMBERANDPARAMETERSOFWEARDEBRIS,FUSINGTHERADIALBASEDFUNCTIONRBFNEURALNETWORK,BACKPROPAGATIONBPNEURALNETWORKANDGREYRELATIONALANALYSISMETHODS,IMPROVINGTHEACCURACYRATEOFDEBRISAUTORECOGNITIONBASEDONTHECOLLECTEDINFORMATIONOFTHEDEBRISCONFIGURATIONCHARACTERISTICSANDCONDUCTINGTHEDIAGNOSISONTHEAEROENGINEWEARFAULTSACCORDINGTOTHERECOGNITIONFINALLY,ASYNTHETICINTELLIGENTDIAGNOSISMODELBYDATAFUSIONFAULTDIAGNOSISMETHODBASEDONABOVEDIAGNOSISMETHODWASPUTFORWARD,ANINTELLIGENTMONITORINGSOFTWARESYSTEMOFAEROENGINEISDEVELOPEDBASEDONTHEABOVERESEARCHKEYWORDSAEROENGINE,WEAR,XRF,DEBRISANALYSIS,INFORMATIONFUSION,INTELLIGENTANALYSIS

簡介：哈爾濱工業(yè)大學碩士學位論文航天器軌道動力學仿真技術研究姓名白紹竣申請學位級別碩士專業(yè)一般力學與力學基礎指導教師王日新20050601哈爾濱工業(yè)大學工學碩士學位論文ABSTRACTTHESPACECRAFTORBITISONEOFTHEMOSTIMPORTANTELEMENTSINTHEFLIGHTMISSIONS，ANDTHEDESIGNANDPROPAGATEOFSPACECRAFTORBITISAPIECEOFIMPORTANTANDCOMPLEXWORKTHUS，THESIMULATIONOFORBITDYNAMICSMAKESGREATSENSEINMILITARYTHISPAPERWHICHISRESEARCHONSPACECRAFTORBITDYNAMICSIMULATIONISANIMPORTANTANDELEMENTALPARTOFTHENATIONALHIGHTECH863703PLAN“THEPRIMARYSIMULATIONSYSTEMOFSPACEENVIRONMENTANDWEAPONS”INTHISTHESIS，THEORBITTHEORYOFSPACECRAFTISINTRODUCEDAHIGHPRECISIONMODELOFORBITDYNAMICSISBUILT，INWHICHTHEPERTURBATIONSDUETONONSPHERICALGRAVITATION，SUNLIGHTPRESSURE，ATMOSPHERICDRAGANDLUNISOLARGRAVITATIONAREINCLUDEDTHEPROPERTIESOFSUNSYNCHRONOUSORBIT，GEOSTATIONARYORBIT，GROUNDTRACEREPETITIONORBIT，MOLNIYAORBITARESTUDIEDANDTHEWAYSTODESIGNSUCHORBITSAREOFFEREDTHESOFTWAREMODULEDEVELOPEDINTHISTHESISSERVESFORMANYOTHERMODULESTHEEFFICIENCYOFTHISMODULEDIRECTLYAFFECTSTHEPERFORMANCEOFTHEWHOLESYSTEMTHENUMERICALHIGHPRECISIONORBITPREDICTIONALGORITHM，WHICHINCLUDESRUNGEKUTTAFEHLBERGADAPTIVESTEPINTEGRALALGORITHM，LEGENDREPOLYNOMIALSALGORITHM，TRIGONOMETRICFUNCTIONSERIESANDSOON，ISTHEMOSTCOMPLEXANDEXHAUSTING，THISPAPEROPTIMIZEDTHEALGORITHMSRELATINGTOORBITPREDICTIONTHECOMPUTATIONALCOMPLEXITYTHEORYWASADOPTEDTOANALYSISANDOPTIMIZETHEALGORITHMSINTHERESULT，THEEFFICIENCYOFTHEALGORITHMWASIMPROVEDALOTTHESIMULATIONSYSTEMOFSPACECRAFTORBITDYNAMICSBASEDONATLCOM，WHICHMAKESTHEPROGRAMMODULARANDREUSABLE，ISFINISHEDITOFFERSMANYFUNCTIONSSUCHAS，SPECIALORBITSDESIGN，COMMONORBITDESIGN，HIGHPRECISIONORBITPROPAGATING，LONGTERMORBITPREDICTION，SPACECRAFTATTITUDEKINEMATICANALYSIS，GROUNDTRACEREPORT，COVERAGEANALYSIS，COMMUNICATIONLINKANALYSISANDS0ONATLAST，INORDERTOTESTTHEFUNCTIONSOFTHESYSTEM，ATESTPLATFORMWASDEVELOPEDTHETESTRESULTSSHOWEDTHATTHESIMULATIONSYSTEMWASAHIGHPERFORMANCEPRODUCTII