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簡(jiǎn)介：西北工業(yè)大學(xué)碩士學(xué)位論文航空電源故障特征提取與故障診斷研究姓名黃根全申請(qǐng)學(xué)位級(jí)別碩士專業(yè)控制理論與控制工程指導(dǎo)教師張涇周20050301西北工業(yè)大學(xué)碩士學(xué)位論文AIRCRAFTELECTRICPOWERSOURCESYSTEMAEPSSISANIMPORTANTEQUIPMENTTRANSFORMINGTHEENGINEENERGYTOELECTRICENERGYFORALLELECTROEQUIPMENTSINAIRPLANEITSRIGHTWORKINGSTATEISAKEYTOENSURENORMALANDSECURERIGHTOFAIRPLANECONDITIONDETECTIONANDFAULTDIAGNOSISISAMAINRESEARCHINFIELDOFAIRCRAFTELECTRICPOWERSOURCESYSTEMAIRCRAFTELECTRICPOWERSOURCEISUSUALLYCONSTITUTEDBYTHREEGRADESOFGENERATORBUTITISDIFFICULTTOBUILDFAULTMODELFORITSCOMPLEXITYSTRUCTUREATPRESENTEXAMINEANDREPAIRONTHEGROUNDDEPENDSONSOMETRADITIONALINSTRUMENTSANDROUTINEEXAMINEWHOSEDISADVANTAGESAREFEWINSPECTINGITEMSANDLOWEFICIENCYTHISOFLINETESTINGMETHODCANNOTEXACTLYGETIMPORTANTSTATESANDPARAMETERSOFFAULTSINTHISPAPERACONDITIONDETECTIONANDFAULTDIAGNOSISSYSTEMSIMULATING“ONLINE“ONTHEGROUNDOFTHEAIRCRAFTELECTRICPOWERSOURCESYSTEMISDESIGNEDWHICHBASEDONMULTISENSORINFORMATIONFUSIONTECHNIQUEANALYZEDTHREEKINDSOFFAMILIARELECTRICFAULTSOFAIRCRAFTELECTRICPOWERSOURCEGENERALINSPECTINGITEMSARECONFIRMEDFORDIFFERENTDATAOFMULTISENSORDIFERENTSIGNALPROCESSINGMETHODSEXTRACTFAULTFEATURESANDIMPROVESNRTHEFOUNDATIONOFFAULTFEATUREDATABASEPROVIDESAGOODBASEFORFAULTDIAGNOSISANDCLASSIFYINGEVIDENCEREASONINGISUSEDINFAULTDIAGNOSISANDCLASSIFYINGOFTHEAIRCRAFTELECTRICPOWERSOURCESYSTEMTHEORYOFEVIDENCEANDDEMPSTERSRULEAREINTRODUCEDANDTHEMETHODGETTINGPROBABILITYEVALUATEISSTUDIEDTHERESULTSOFTHESIMULATIONSSHOWTHEEFECTIVENESSOFEVIDENCEREASONINGMETHODANDTHECONDITIONDETECTIONANDFAULTDIAGNOSISSYSTEMONTHEGROUNDWORDSAIRCRAFTELECTRICPOWERSOURCEFEATUREEXTRACTIONFAULTDIAGNOSISINFORMATIONFUSIONEVIDENCEREASONING11

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簡(jiǎn)介：激光溫噴丸強(qiáng)化TI6AL4V航空鈦合金的殘余應(yīng)力釋放行為及疲勞特性RESIDUALSTRESSRELAXATIONANDFATIGUEPROPERTYOFTI6A14VAEROSPACETITANIUMALLOYINDUCEDBYWARMLASERPEENING2014年6月學(xué)位論文版權(quán)使用授權(quán)書江蘇大學(xué)、中國(guó)科學(xué)技術(shù)信息研究所、國(guó)家圖書館、中國(guó)學(xué)術(shù)期刊光盤版電子雜志社有權(quán)保留本人所送交學(xué)位論文的復(fù)印件和電子文檔，可以采用影印、縮印或其他復(fù)制手段保存論文。本人電子文檔的內(nèi)容和紙質(zhì)論文的內(nèi)容相一致，允許論文被查閱和借閱，同時(shí)授權(quán)中國(guó)科學(xué)技術(shù)信息研究所將本論文編入中國(guó)學(xué)位論文全文數(shù)據(jù)庫(kù)并向社會(huì)提供查詢，授權(quán)中國(guó)學(xué)術(shù)期刊光盤版電子雜志社將本論文編入中國(guó)優(yōu)秀博碩士學(xué)位論文全文數(shù)據(jù)庫(kù)并向社會(huì)提供查詢。論文的公布包括刊登授權(quán)江蘇大學(xué)研究生處辦理。本學(xué)位論文屬于不保密∥學(xué)位論文作者簽名荔J翁黝炒F仁年6月胗日指導(dǎo)教師簽名≯1Q年G月【D日

簡(jiǎn)介：分類號(hào)UDC密級(jí)學(xué)校代號(hào)學(xué)號(hào)廣東工業(yè)大學(xué)博士學(xué)位論文工學(xué)博士118451240601011面向航空發(fā)動(dòng)機(jī)葉片頂端修復(fù)的曲面再生算法與誤差分析吳海東指導(dǎo)教師姓名、職稱直毽學(xué)科專業(yè)或領(lǐng)域名稱扭撼電王工猩學(xué)生所屬學(xué)院扭電王猩堂醫(yī)論文答辯日期2盟墨12璺摘要摘要在航空發(fā)動(dòng)機(jī)中，葉片是壓縮機(jī)和渦輪機(jī)的核心組件，苛刻運(yùn)行環(huán)境造成葉片嚴(yán)重磨損、扭曲、裂紋、凹坑等缺陷。由于葉片形狀的微小改變會(huì)直接導(dǎo)致航空發(fā)動(dòng)機(jī)的穩(wěn)定運(yùn)行，缺陷葉片的精密修復(fù)就成為航空發(fā)動(dòng)機(jī)保障其高性能的關(guān)鍵因素。目前葉片修復(fù)工作主要集中在頂端磨損、崩口、葉面磨損等缺陷，其中葉片頂端磨損尤其是扭曲葉片的頂端磨損是急需解決的關(guān)鍵。本論文針對(duì)扭曲葉片頂端磨損缺陷的修復(fù)問題，開展精密修復(fù)過程中所需的葉片曲面模型重構(gòu)研究，提出基于遺傳算法的扭曲葉片非磨損域曲面重構(gòu)和基于G2曲面連續(xù)的葉片頂端曲面再生等方法，為葉片修復(fù)過程中的精密加工路徑的生成提供相應(yīng)的曲面模型，解決各自葉片形體精密修復(fù)的參考模型構(gòu)建難題，有利于促進(jìn)資源的再利用和經(jīng)濟(jì)的可持續(xù)發(fā)展。本文的主要內(nèi)容包括如下幾個(gè)方面1較為全面地調(diào)研了航空發(fā)動(dòng)機(jī)葉片修復(fù)的國(guó)內(nèi)外研究現(xiàn)狀和存在的難題。航空發(fā)動(dòng)機(jī)葉片修復(fù)以葉片頂端磨損缺陷的修復(fù)居多，國(guó)外對(duì)于此類缺陷的直葉片修復(fù)己較為成熟，但對(duì)于扭曲葉片頂端磨損域的精密修復(fù)問題仍然未有很好的解決途徑。由于葉片的制造誤差和使用過程中易發(fā)生變形等原因，使葉片原設(shè)計(jì)階段的曲面模型不再適用于修復(fù)階段，精密重建和再生修復(fù)葉片的磨損域曲面模型，成為扭曲葉片修復(fù)加工成型的重要環(huán)節(jié)。2針對(duì)葉片頂端磨損域邊界附近的未磨損域曲面模型重構(gòu)問題，提出基于迭代的扭曲葉片未磨損域曲面重構(gòu)方法。該方法首先對(duì)截面測(cè)量數(shù)據(jù)進(jìn)行對(duì)正處理，推導(dǎo)出閉合B樣條曲線G2連續(xù)的表達(dá)式，以此構(gòu)建迭代插值法計(jì)算其控制點(diǎn)，擬合出葉片截面輪廓線，并由此構(gòu)建出基于B樣條曲面的葉片未磨損域的曲面模型。重構(gòu)曲面的擬合平均誤差約為00325MM。為進(jìn)一步提高曲面重構(gòu)精度，本文提出基于遺傳算法的扭曲葉片未磨損域曲面重構(gòu)方法。該方法運(yùn)用遺傳算法進(jìn)行數(shù)據(jù)點(diǎn)參數(shù)化和節(jié)點(diǎn)矢量的配置，用最D乘逼近法計(jì)算其控制點(diǎn)，無需對(duì)測(cè)量數(shù)據(jù)進(jìn)行精簡(jiǎn)或施加人為約束，擬合的平均誤差僅為000345LMM，擬合精度顯著提高。

簡(jiǎn)介：南京航空航天大學(xué)碩士學(xué)位論文民用航空發(fā)動(dòng)機(jī)典型部件的疲勞壽命與可靠性分析姓名宋華申請(qǐng)學(xué)位級(jí)別碩士專業(yè)航空宇航推進(jìn)理論與工程指導(dǎo)教師羅貴火20090301南京航空航天大學(xué)碩士學(xué)位論文VABSTRACTTHEPURPOSEOFSTUDYONFATIGUELIFEANDRELIABITILYFORCIVILAEROENGINEISACTUALIZINGTHEBESTMAINTAININGDECISIONANDMANAGINGHEALTHYTHISTEXTWORKSOVERTHEMETHODSOFTHEFATIGUELIFEPREDICTIONFORCIVILAEROENGINE,ANDTHEMETHODSOFANALYSISOFRELIABILITYFORAEROENGINE’SACCESSORIESFORAREALAEROENGINE,THEFATIGUELIFEANDRELIABILITYWEREANSLYSEDASARESULT,THEDATAWILLBEHELPFULFORTHEMAINTENANCE,ITCANPREDICTTHEDATEOFMAINTENANCEINTHEHELPOFTHEANALYSIS,WECANMAINTAINTHEAEROENGINEBASEDONIT’SOPERATING,TOMAINTAINITINTIMEAND,THEMAINTENANCECOSTWILLBEREDUCEDALSO,ITISGOODFORDECIDINGTHENUMBEROFTHEPARTSSO,THISTEXTHASWORKEDASFOLLOWS1COLLECTEDALOTOFDATAFORRUNNINGOFAREALCIVILAEROENGINEBASEDONTHERAINFLOWCOUNTING,WROTEAPROGRAMMEDALGORITHMABOUTSTRESSSPECTRUMWITHCWORDS2ESTABLISHEDASIMPLEMODELOFAREALBLADEWITHUG,MADEANANALYSISWITHANSYSPREDICTEDITSFATIGUELIFEWITHANAPPROPRIATEWAY3MANAGEDTHEREALMAINTENANCEDATA,STUDYEDTHERELIABILITYOFTHEFUELPUMPANDTHECONTROLLEROFOILSYSTEMTHEANALYSISDATACANOFFERSOMEREFERENCEFORMAINTENANCEANDTHEMOTHBALLNUMBEROFTHESEPARTSTHESTUDYOFFATIGUELIFEPREDICTIONANDRELIABILITY,THEANALYSISOFTHEPARTSOFAREALAEROENGINE,ALLOFTHEMESTABLISHEDTHEBASICOFTHEAUTONOMICMAINTAINSYSTEMFORCIVILAEROENGINEKEYWORDSSTRESSSPECTRUM,TURBINEBLADE,FATIGUELIFE,FUELPUMP,RELIABILITY,3PARAMETERLOGISTICDISTRIBUTING

簡(jiǎn)介：湖南大學(xué)碩士學(xué)位論文航空動(dòng)力試驗(yàn)技術(shù)市場(chǎng)開發(fā)戰(zhàn)略研究姓名夏光耀申請(qǐng)學(xué)位級(jí)別碩士專業(yè)工商管理MBA指導(dǎo)教師馬超群2000101塑塑奎堂三塑竺望主、業(yè)堡主塹壅竺蘭垡笙蘭ABSTRACTAERODYNAMICEXPERIMENTALTECHNIQUEASACOMPLICATEDANDENORMOUSTECHNICALSYSTEM，HASBECOMEAHIGHTECHNICALRESOURCEONALARGESCALEAFTERYEARSOFCONTINUOUSINVESTMENTANDCONSTRUCTIONHOWTOMAKEFULLUSEOFTHISKINDOFHIGHTECHNICALRESOURCEUNDERMARKETECONOMICSYSTEMSOASTOBRINGABOUTECONOMICEFFECTSHASGRADUALLYBECOMEACOMMONCONCERNEVENNOWSUCHAHIGHTECHNICALRESOURCEHASBEENCONSTRAINEDTOBEUSEDWITHINALIMITEDSCOPEDUETOTHEAFFECTIONOFTRADITIONALADMINISTRATIVEPATCEMTHEUTILIZATIONCOEFFICIENTISVERYLOWTOSAYNOTHINGOFECONOMICEFFECTSASAMATTEROFFACT，THERESOURCEISSPECIALIZEDTOAERONAUTICSTHISISNOTSAY，HOWEVERITEOULDN’TBETAKENINTOUSEOUTOFITSSPECIALTYTHEEXPERIMENTALTECHNIQUEISFOUNDTOBEINGREATREQUESTINMANYDOMAINSONABASISOFINVESTIGATIONANDANALYSISOFTHEMARKETNEVERTHELESS，ITAPPEARSNOWTHATTHEREQUESTSHAVEN’TBEENSATISFIEDONTHEONEHAND，WHILETHETECHNIQUEHASN’TBEENADEQUATELYUTILIZEDONTHEOTHERTHISRESULTSINTHATTHEAERODYNAMICEXPERIMENTALTECHNIQUEISRESTRAINEDFROMFURTHERDEVELOPMENTINTHEMEANTIME，THEREPEATEDINVESTMENTISMADEWASTEFULLYASWELLBASEDONTHEABOVEREASONS，THEPAPERHEREOFSYSTEMATICALLYSTUDIESWAYSTHROUGHWHICHTHEAERODYNAMICEXPERIMENTALTECHNIQUEISTRANSFORMEDINTOECONOMICEFFECTSTHEWASTEFULNESSOFAERODYNAMICEXPERIMENTALTECHNIQUEASAHIGHTECHNICALRESOURCEISDISCUSSEDFROMATECHNICALECONOMICPOINTOFVIEWTHEMARKETREQUESTCONCERNEDISANAL3’ZEDUNDERMARKETSTUDYTHESTRATEGICMODELISCONSTRUCTEDFORMARKETDEVELOPMENTBYMATHEMATICALMETHODSBOTHECONOMICANDTECHNICALEFFECTIVENESSOFTHEDEVELOPMENTAREPROVEDBYPRACTICALCASESATTHEENDTHEPAPERGENERALIZESTHESTRATEGYFORMARKETDEVELOPMENTFROMTHEABOVEASAWHOLE，THEPAPERCONSIDERSTHEADEQUATEUTILIZATIONOFAERODYNAMICEXPERIMENTALTECHNIQUETOALARGEREXTENT，WHICHWILLBEOFBENEFITTOTHEDEVELOPMENTOFTHETECHNIQUEITSELFASWELLASTOTHEECONOMICEFFECTSITISMEANTTOSUPPLYTHOSEWHOAREENGAGEDINAERODYNAMICEXPERIMENTALWORKWITHTHETHOUGHTOFMARKETDEVELOPMENTANDMEANSOFTECHNICALECONOMICANALYSISKEYWORDSEXPERIMENTALTECHNIQUE；UTILIZATIONOFRESOURCE；STRATEGICANALYSISMARKETDEVELOPMENT

簡(jiǎn)介：碩士學(xué)位論文碩士學(xué)位論文航天器低沖擊分離控制技術(shù)研究RESEARCHONCONTROLOFSPACECRAFTINLOWIMPACTSEPARATION崔垚哈爾濱工業(yè)大學(xué)哈爾濱工業(yè)大學(xué)2013年7月CLASSIFIEDINDEXV4482UDC62978DISSERTATIONFTHEMASTERDEGREEINENGINEERINGRESEARCHONCONTROLOFSPACECRAFTINLOWIMPACTSEPARATIONCIDATECUIYAOSUPERVISPROFLISHUNLIACADEMICDEGREEAPPLIEDFMASTEROFENGINEERINGSPECIALITYSPACEENGINEERINGAFFILIATIONSCHOOLOFASTRONAUTICSDATEOFDEFENCEJULY2013DEGREECONFERRINGINSTITUTIONHARBININSTITUTEOFTECHNOLOGY

簡(jiǎn)介：洳滬土博士學(xué)位論文論文題目⑧鈦合金航空整體結(jié)構(gòu)件銑削加7變形的預(yù)測(cè)理論及方法研究作者姓名楊勇指導(dǎo)教師柯映林教授學(xué)科專業(yè)機(jī)械制造及其自動(dòng)化所在學(xué)院機(jī)械與能源工程學(xué)院提交日期二零零七年四月浙江大學(xué)博士學(xué)位論文采用接力計(jì)算方法模擬了鈦合金航空整體結(jié)構(gòu)件銑削加工過程并對(duì)加工變形進(jìn)行了預(yù)測(cè)。通過模擬分析毛坯初始?xì)堄鄳?yīng)力、切削載荷及其耦合因素對(duì)航空整體結(jié)構(gòu)件加工變形的影響規(guī)律，指出切削載荷是影響鈦合金整體結(jié)構(gòu)件加工變形的主要因素。最后，通過與航空整體結(jié)構(gòu)件銑削加工實(shí)驗(yàn)變形結(jié)果相比較，對(duì)本論文研究結(jié)論進(jìn)行了驗(yàn)證，從而說明本論文研究的思路、方法是可行的，研究結(jié)果也是可靠的。關(guān)鍵詞航空整體結(jié)構(gòu)件；鈦合金；加工變形；有限元模擬；材料本構(gòu)模型；熱力耦合；銑削加工；三維切削；切削力；切削溫度；退火；殘余應(yīng)力；接力計(jì)算；加工變形預(yù)測(cè)；變形規(guī)律本論文研究得到了國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目的資助