簡介：上海交通大學碩士學位論文典型航天產品電子束焊接變形預測與控制姓名吳飛申請學位級別碩士專業(yè)材料加工工程指導教師陸?zhàn)?0040101PREDICTIONCONTRALOFTHEDEFMATIONOFELECTRONBEAMWELDINGONTYPICLEAEROWKPIECESABSTRACTFIRSTLYSEVERALNUMERICALMETHODSOFPREDICTINGWELDINGDEFMATIONARECOMPAREDBASICTHEYPROPERTYAPPLICABILITYOFEACHNUMERICALMETHODAREDISCUSSEDTHEMECHANICSOFWELDINGDEFMATIONISALSODISCUSSEDINTHISPAPERTHETHERMOELASTICPLASTICFEMISPAIDMEATTENTIONTOINTHETHESISTAKINGINTOACCOUNTTHEGEOMETRICALDIMENSIONSMATERIALSPROPERTIESHEATDISTRIBUTIONTHEMESHASERIESOFTHINCYLINDERISCREATEDFELECTRONBEAMWELDINGEBWAFTERCOMPARISONRULESAREGIVENOUTTODETERMINEEACHFACTTHEEFFECTOFTHELATENTHEATOFFUSIONMOLTENMETALISRESEARCHEDINTHISPAPERTHEAPPLICABILITYOFTHEINHERENTSTRAINMETHODISDISCUSSEDFEBWONTHINCYLINDERSTHEVALUEOFKCM3JINTHEEQUATIONOFWXKQVTOGETHERWITHTHEVALUEOFCM3JINTHEEQUATIONOFWYQVAREGIVENFEBWCOMPUTATIONFCYLINDERSOFDIFFERENTMATERIALSDIFFERENTSIZESSHOWSTHATISACONSTANTVALUEFEBWONTHINCYLINDERKISAFFECTEDBYTHERADIUSOFCYLINDERSBASEDONTHERMOELASTICPLASTICFEMTHEPREDEFMATIONPROCESSISSIMULATEDAMETHODISGIVENTODETERMINEPREDEFMATIONVALUESOMEADVICESAREGIVENTOIMPROVECURRENTPREDEFMATIONPROCESSATLASTTHECOOLINGEFFECTOFTHEFIXERTHEEFFECTOFSKIPWELDINGAREEVALUATEDBYNUMERICALANALYSIS

簡介：哈爾濱工程大學碩士學位論文小型航空發(fā)動機傳感器容錯控制技術研究姓名劉漢斌申請學位級別碩士專業(yè)控制工程指導教師蘭海；何保成20111104哈爾濱工程大學碩士學位論文II

簡介：航天遙測數據實時存儲及可視化系統設計與實現重慶大學碩士學位論文（專業(yè)學位）學生姓名邱翊峰指導教師柴毅教授兼職導師王剛高工學位類別工程碩士（控制工程）重慶大學自動化學院二O一七年四月DESIGNIMPLEMENTATIONOFREALTIMESTAGEVISUALIZATIONSYSTEMFAERIALTELEMETRYDATAATHESISSUBMITTEDTOCHONGQINGUNIVERSITYINPARTIALFULFILLMENTOFTHEREQUIREMENTFTHEPROFESSIONALDEGREEBYQIUYIFENGSUPERVISEDBYPROFCHAIYIPLURALISTICSUPERVISEDBYSENIENGWANGGANGSPECIALTYMECONTROLENGINEERINGCOLLEGEOFAUTOMATIONOFCHONGQINGUNIVERSITYCHONGQINGCHINAAPRIL2017

簡介：中南工業(yè)大學博士后學位論文航空剎車用CC復合材料氧化行為抗氧化涂層的研究姓名易茂中申請學位級別博士后專業(yè)材料學指導教師黃伯云19990701出爐。其最佳抗氧化效果為9000C、2小時靜態(tài)氧化失重率為015％，9000C、4小時氧化失重率為113％。5未固化處理的涂層試樣900。C靜態(tài)氧化動力學曲線呈二段直線型，而固化處理的涂層試樣在900。C氧化的動力學曲線具有拋物線形狀，不論涂層固化與否在較低溫度的700。C靜態(tài)氧化動力學曲線基本上呈直線型。6帶涂層的C／C復合材料氧化過程是一個復雜的氣固反應過程，包括I氧氣向內的擴散；2氧與涂層中的耗氧組元反應生成新的陶瓷組元；3進入涂層與基體材料界面的氧與材料發(fā)生氧化反應形成氣體；4反應氣體向外擴散。關鍵詞C／C復合材料氧化抗氧化涂層飛機剎車盤

簡介：中南大學碩士學位論文航空發(fā)動機軸間密封CC復合材料的制備及摩擦磨損特性研究姓名彭春蘭申請學位級別碩士專業(yè)材料學指導教師易茂中20020101ABSTRACTTHESEALRINGISTHECRITICALPARTFBRTHESEALINGOFTHEMAINAXISOFAEROPLANEENGINEACCORDIⅡGTOTHEREQUIREMEⅡTOFAPPLYINGCONDITIONS，ITMUSTHAVEHIGHSTRENGTH，EXCELLENTOXIDATIONRESISTANCEANDLOWCOEFFICIENTOFFRICTIONANDWEARRATIOTHECARBONCARBOⅡCOMPOSITESWEREFABRICATEDANDTHEIRPROPERTIESWEREANALYZEDWHAT’SMORE，FRICTIONANDWEARPROPERTIESOFTWOTYPESOFMATERIALS，CARBONCARBONCOMPOSITEANDHIGHSTREⅡGTHGRAPHITEW血ICHWASSUPPOSEDTOBEUSEDASTHESEALRINGOFTHEMAINAXISOFAEROPLANEENGINE，WEREINVESTIGATEDACCORDIⅡGTOTHEREQUIREMENTOFAPPLYINGCONDITIONSANDPFOPERTIESOFTHESEAL“ⅡGOFTHEMAINAXISOFAEROPLANEENGINE，PREFBRMSWEREDESIGNEDINTOTHESUBSTRATETHATTHECARBONCLOTHANDFELTALTERNATELYWEREWINDEDAROUⅡDTHECYLIⅡDERAⅡDTHENNEEDLEDWITHCARBONFIBERINTHERADIALDIRECTIONANDTHEOTHER3一DWEAVIⅡGSUBSTRATETBREINFBRCETHEFIBREANDTHEMATRIXCONNECTING，PREFORMSWEREDENSIFIEDBYCVDFIRSTLYTHEPYROLYTICCARBOⅡWITHRL／SLSTRUCTUREORSLSTRUCTUREWASOBTAINEDAFTERTHATTHEMATERIALSWEREFURTHERDENSIFIEDWITHRESINANDHEATTREATEDAT2L00℃THESTRENGTH觚DWEARRESISTANCEWASIMPROVED，ANDTHERESINWOULDGUARANTEETHESEALINGEFFECTAFTERHEATTREATMENT，THEDEGREEOFGRAPHITIZATIONOFTHEMATERIALSWASABOUT30～50％，ANDTHEDEGREEOFGRAPHITIZATIONOFMATERIALL6拌WASAMOUNTT0471％THEHARDNESSOFTHE3DPREFBRMMATERIALWASCLOSEINTHERADIALANDCIRCUMAMBIENTDIRECTIONBUTTHEHARDNESSOFTHEOTHERPREFORMWASALMOSTANISOTROPICTHETHERMALCONDUCTIVITYWASALSOANISOTROPICTHECOEFFICIENTOFTHERMALEXP蚰SIONDECREASEDWITHTHETEMPERATUREINCREASEDWHEN400℃，ITWASATTHEBOTTOM，鋤DWHEⅡTO500℃，ITINCREASEDANDTHEMECHANICALPROPERTYOFCARBONCARBONCOMPOSITEWASPSEUDOPLASTICBYSTUDYINGFICTIOⅡANDWEAROFTHECARBONCARBONCOMPOSITEANDIT

簡介：中圖分類號V2337論文編號102870215S103學科分類號082502碩士學位論文航空發(fā)動機控制系統傳感器故障診斷與容錯控制研究生姓名姜潔學科、專業(yè)航空宇航推進理論與工程研究方向航空發(fā)動機傳感器故障診斷指導教師李秋紅副教授南京航空航天大學研究生院能源與動力學院二О一五年三月NANJINGUNIVERSITYOFAERONAUTICSANDASTRONAUTICSTHEGRADUATESCHOOLCOLLEGEOFENERGYANDPOWERENGINEERINGRESEARCHONAEROENGINECONTROLSYSTEMSENSORFAULTDIAGNOSISANDFAULTTOLERANTCONTROLATHESISINAEROSPACEPROPULSIONTHEORYANDENGINEERINGBYJIANGJIEADVISEDBYASSOCIATEPROFESSORLIQIUHONGSUBMITTEDINPARTIALFULFILLMENTOFTHEREQUIREMENTSFORTHEDEGREEOFMASTEROFENGINEERINGMARCH,2015

簡介：西北工業(yè)大學碩士學位論文某型航空螺旋離心泵性能計算研究姓名何海強申請學位級別碩士專業(yè)控制理論與控制工程指導教師郭迎清20040301ABSTRACTFUELPUMPANDLUBEPUMPUSEDINPRESENTAEROENGINEANDSPACEENGINEAREORIENTEDTOSMALLERVOLUME，BIGGERFLUXANDHIGHERPRESSURETHEYDIFFERSMUCHFROMTHETRADITIONALHYDRAULICELEMENTBOTHINMECHANICSANDINPRINCIPLETHEFRESHTHOUGHTANDCUTEMETHODUSEDINTHESEPUMPSMAKETHEMWORKBETTERANDCONTRIBUTEMORETOTHEOPERATIONOFTHERULESYSTEMTHUS，ITISOFMUCHINDISPENSABILITYTOFINDOUTTHENEWIDEASANDEXCLUSIVEMECHANICSSTRUCTUREANDPERFORMANCEOFASCREWCENTRIFUGALPUMPUSEDINAEROENGINEWASDISCUSSEDINTHISPAPERANDTHECALCULATIONMETHODOFTHEPUMP’SPERFORMANCEWASALSOGIVENOUTTHEPAPERBEGINSWITHTHEDISCUSSIONOFTHEOPERATINGPRINCIPLEANDFUNCTIONOFTHESCREWINDUCERSPECIALELEMENTOFTHEPUMP，ANDTHENGIVESTHEDEFINITIONANDRELATIONSHIPOFTHEPARAMETERSANDTHECURVEFUNCTIONOFTHEINDUCERASWELL，WHICHISOFGREATIMPORTANCETODATAANALYZINGANDPUMPMANUFACTURINGBYPRESENTINGTHESIMPLIFIEDFLOWMODEL，THEFLOWANDVELOCITYTRIANGLESWEREANALYZEDTNTHEPAPERTHEAUTHOREXCAVATEDTHEPERFORMANCE，CALCULATEDTHEVELOCITY，PRESSUREANDFLOWLOSSOFTHEWORMSHELL，THEOUTLETELEMENTOFTHEPUMPACCORDINGTOTHECOMMONMETHODOFTHEPERFORMANCECALCULATIONOFCENTRIFUGALPUMP，THEAUTHORCALCULATEDTHEHEADANDPOWEROFTHEPUMP，SHOWEDTHEWAYTOGETTHEPRESSUREOFTHEOUTLETANDTHEAUTHORALSOINDICATEDTHEIMPACTOFTHESTRUCTUREPARAMETERSANDTHUSGUIDEDTHEDESIGNOFTHEPUMPTHERESULTSSHOWTHATTHESCREWCENTRIFUGALPUMPISATYPEOFWELLWORKINGPUMPWITHGOODPERFORMANCE，ITHASHIGHERHEADANDEFFICIENCYWITHBETTERABILITYOFANTIEROSIONBOTHTHEPARAMETERSANDTHEWORKINGCONDITIONCANAFFECTTHEPUMP’SOPERATIONANDPERFORMANCEDIRECTLYITISAUSEFULWAYTOCHANGETHESEPARAMETERSTOMEETTHENEEDOFTHEENGINEERING【KEYWORDS】SCREWCENTRIFUGALPUMP；SCRE％VINDUCER；WORMSHELLPERFORMANCECALCULATION

簡介：碩士學位論文士學位論文航空遠距離傾斜攝影相機掃描穩(wěn)像及像移補償技術研究RESEARCHONSCANNINGMOTIONCOMPENSATIONOFAIRBNECAMERAFLONGRANGEOBLIQUEPHOTOGRAPHY李福東李福東哈爾濱工業(yè)大學哈爾濱工業(yè)大學2015年7月CLASSIFIEDINDEXV2435UDC6213DISSERTATIONFTHEMASTERDEGREEINENGINEERINGRESEARCHONSCANNINGMOTIONCOMPENSATIONOFAIRBNECAMERAFLONGRANGEOBLIQUEPHOTOGRAPHYCIDATELIFUDONGSUPERVISPROFGUANYINGZIACADEMICDEGREEAPPLIEDFMASTEROFENGINEERINGSPECIALITYSPACECRAFTDESIGNAFFILIATIONSCHOOLOFASTRONAUTICSDATEOFDEFENCEJULY2015DEGREECONFERRINGINSTITUTIONHARBININSTITUTEOFTECHNOLOGY

簡介：中國民用航空學院碩士學位論文BP網絡與航空發(fā)動機模型在間隙對性能影響研究中的應用姓名馬曉剛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白杰李書明20040110中國民用航空學院碩士學位論文ABSTRACTTHISPAPEROPTIMIZEDANDANALYZEDTHEDATAOFASSEMBLYTOLERANCESINTEGRATEDWITHTHEFACTDURINGAEROENGINEMAINTENANCE，ANDASSEMBLEDAMODELTORESEARCHTHERELATIONSHIPBETWEENTHETOLERANCESOFKEYENGINECOMPONENTSINCLUDINGTIPCLEMANCESOFROTATINGCOMPONENTSANDENGINEPERFORMANCETHROUGHTHECOMBINEDUSEOFBPARTIIKIALNEURALNETWORKANDCONVENTIONALTHEORETICMODELOFAEROENGINEINTHERESULTOFTHISPAPER，SOMERULESAREGIVENTOOUTLINETHESERELATIONSHIPSTHATISVERYUSEFULTOCONTROLTHEASSEMBLYTOLERANCESANDACHIEVEHIGHLEVELSOFENGINEPERFORMANCEAFTERSERVICINGDATAOFASSEMBLYTOLERANCESDISCUSSEDINTHISPAPERARESTATICTOLERANCEBEFORETESTANDEMPHASIZEPARTICULARLYOILINVESTIGATINGTHERELATIONSHIPBETWEENCLEARANCESOFASSEMBLYBLADESANDTHEENGINEPERFORMANCEBESIDES，BPARTIFICIALNEURALNETWORKANDWORKINGCONDITIONEQUATIONOFTHEENGINEAREADOPTEDINTHISPAPERTOFORECASTTHEEFFECTOFTIPCLEARANCEONPARAMETERSOFENGINESUCHASEFFICIENCYOFPRESSURECOMPRESSOGEFFICIENCYOFTURBINE，THETEMPERATUREINTHEFRONTOFTURBINEANDEXHAUSTGASTEMPERATUREBECAUSEOFTHELIMITATIONOFTHEANALYTICALMETHODOFMATHEMATICS，THERELATIONSHIPOFTOLERANCERECORDEDDURINGMAINTAININGANDENGINEPERFORMANCEDESCRIBEDINTHISPAPERCORRESPONDSTOTHESPECIFICSERVICINGCONDITIONANDMODELBUTTHEMETHODCANAPPLYTODEALWITHOTHERENGINEMODELTHEDATAINTHISPAPERARECOLLECTEDFROMACIVILTURBINEFANENGINEWITHAFAN，TWOAXIALCOMPRESSORS，ANAXIALHIGHPRESSURETURBINEHPRLL，ANDANAXIALLOWPRESSURETURBINELPTCANREPRESENTCOMMONMODELTHROUGHANALYZINGINTHISPAPERWEVERIFIEDTHATTIPCLEARANCESAFFECTSENGINEPERFORMANCEANDOPERABILITYATTHESAMETIMESOMEOTHERTOLERANCESHAVEEFFECTSTOENGINEPERFORMANCESOMECONCLUSIONDRAWNINTHISRESEARCHCANOFFERREFERENCETELEVANTRESEARCHERFINALLY，ANAPPLICATIONPROGRAMPW4000ASSEMBLYTOLERANCESANDENGINEPERFORMANCEANALYSISSYSTEMWASDEVELOPEDINVCLANGUAGEANDODBCDATABASETHROTLGHANALYSISANDPREDICTIONEMPLOYEDTHISSYSTEMTHEVALIDITYOFTHERESEARCHAPPROACHESINTHISPAPERWASVERIFIEDKEYWORDSAEROENGINE，PERFORMANCE，TOLERANCE，BPANN

簡介：碩士學位論文碩士學位論文基于貝葉斯網絡的航天器健康管理系統THESPACECRAFTHEALTHMANAGEMENTSYSTEMBASEDONBAYESIANWKS張力元張力元哈爾濱工業(yè)大學哈爾濱工業(yè)大學2015年6月CLASSIFIEDINDEXV467UDC681513DISSERTATIONFTHEMASTER’SDEGREEINENGINEERINGTHESPACECRAFTHEALTHMANAGEMENTSYSTEMBASEDONBAYESIANWKSCIDATEZHANGLIYUANSUPERVISASSOCIATEPROFYIGUOXINGACADEMICDEGREEAPPLIEDFMASTEROFENGINEERINGSPECIALITYCONTROLSCIENCEENGINEERINGAFFILIATIONSCHOOLOFASTRONAUTICSDATEOFDEFENCEJUNE2015DEGREECONFERRINGINSTITUTIONHARBININSTITUTEOFTECHNOLOGY

簡介：合肥工業(yè)大學碩士學位論文航空軸承性能試驗測試控制系統的研制姓名劉蘇亞申請學位級別碩士專業(yè)機械工程指導教師尹志強徐同申20040401THERESEARCHINGANDMANUFACTURINGOFCONTR0IIINGANDTESTSYSTEMFORAVIATIORBERINGTESTERABSTRACTTHEAVIATIONBEARING‘‘661701”ISDEVELOPEDASINTERVENINGBEARINGWHICHISALSOCALLEDONEWAYBEARINGOFAVIATIONENGINEFORTHE608RESEARCHINSTITUTEOFAVIATIONINDUSTRYBYLUOYANGBEARINGSCIENCEANDTECHNOLOGYCD．，LTD．THEPERFORMANCEOFTHEBEARINGISDIRECTLYASSOCIATEDWITHTHESTARTUP．THEREFOR，ITISVERYIMPORTANTTOTESTTHEONEWAYBEARING“66I701”。TWOELECTRICSPINDLESAREUSED，ONESIMULATESTHESTARTERMOTOR，THEOTHERSIMULATESENGINETODRIVEBEARING．INTHETEST，THESPEEDOFREVOLUTION，TEMPERATURE，OILSUPPLYPRESSUREANDOTHERPARAMETERAREMEASUREDBYTHEINDUSTRYCONTROLCOMPUTER。ATTHESAMETIME，ITDETAILEDDEMONSTRATEANDCARRYOUTTHEWAY，WHICHAPPLYHOUSINGELECTRICSPINDLESATGENERATIONSTATETOCARRYOUTHOUSINGTOQUELOADINGINTHEJOINTTESTINGANDINDIRECTLYESTIMATIONHOUSINGTORQUELOADINGBYTHEELECTROMAGNETISMTORQUEOFINNERTUBEELECTRICSPINDLES．THUS，THETECHNICALPROBLEMTHATTHEHIGHSPEEDSHAFTINGTORQUELOADINGDEVICEANDTORQUESENDERAREDIFFICULTTOINSTALLISSOLVEDANDITSAVESASETOFEXPENSIVEHIGHSPEEDSHAFTINGTORQUELOADINGANDMEASURINGDEVICE．THEOUTCOMEFILLTHEBLANKINTHEDOMESTICFIELDOFTORQUELOADINGFORHIGHSPEEDONEWAYBEARINGTEST．ANDITREACHESADVANCEDLEVELINOURCOUNTRY。THEPARAMETRICSELFADJUSTINGONLINEINTERPOLATIONFUZZYCONTROLISFORMEDBYTHEAPPLYINGPRACTICALINTERPOLATIONMETHODANDPARAMETRICSELFADJUSTINGMETHODTOROUTINEFUZZYCONTROLSYSTEMTHESYSTEMLOWERTHESTATICERRORANDAVOIDTHEFLUTTEROFROUTINEFUZZYCONTROLLER．THESIMULATIONRESULTSPROVETHATTHISSYSTEMHASRAPIDDYNAMICRESPONSESPEEDANDHIGHSTEADYSTATE，ASWELLASGOODFOLLOWINGCAPABILITYANDSTRONGROBUSTNESS．

簡介：華中科技大學博士學位論文航天繼電器觸簧系統接觸彈跳及其影響因素研究姓名熊軍申請學位級別博士專業(yè)電氣工程指導教師何俊佳20081107II最后，本文針對某型航天繼電器的觸頭彈跳模型進行校驗，利用ANSYS建立其電磁系統模型結合ADAMS建立的接觸系統模型進行觸頭彈跳的動力學仿真，并與理論計算結果和實驗結果進行比較，以驗證模型的有效性。關鍵詞航天繼電器觸簧系統接觸彈跳多體動力學理論激光三角原理

簡介：東南大學碩士學位論文加強政府航空安全管理對策研究姓名陳忠躍申請學位級別碩士專業(yè)公共管理指導教師袁久紅20110930ABSTRACTTITLETHESTRATEGYFORTHEGOVERNMENTTOSTRENGTHENAVIATIONSAFETYMANAGEMENTNAMECHENZHONGYUESUPERVISORYUANJIUHONGUNIVERSITYSEUSOUTHEASTUNIVERSITYALONG霄ITHTHERAPIDDEVELOPMENTOFCIVILAVIATIONINDUSTRYOFCHINA。THEDEMANDOFAIRTRANSPORTHASBEENDRAMATICALLYINCREASINGTHECONFLICTBETWEENTHERAPIDGROWTHOFTHEFLIGHTTRAFFICANDTHERELATIVELYWEAKSAFETYBASISISMORESERIOUSTHISPAPERFIRSTANALYZESTHEPRESENTSITUATION8NDCHARACTERISTICSOFTHECIVILAVIATIONSAFETYMANAGEMENTTHENFROMTHESTATISTICALANALYSISOFTHECRASHINTHEPASTTWODECADES，WEOBTAINTHEMAINMANAGEMENTFACTORSFORAVIATIONSAFETYBASEDONTHEABOVEMANAGEMENTFACTORS，霄EANALYZESTHEMAINSECURITYMANAGEMENTPROBLEMSINTHEAVIATIONINDUSTRYFROMTHEPLANNING，ORGANIZATIONCOORDINATIONANDCONTROLFUNCTIONSWEPROVETHATTHE90VER咖ENTNEEDENHANCETHEAVIATIONSAFETYMANAGEMENTFROMSCIENTIFICPLANNING。MACROCONTROL，INSTITUTIONALCHANGE，STRENGTHENINGPRODUCTIONSAFETYRESPONSIBILITY，STRENGTHENINGEMERGENCYMANAGEMENTANDSOONTHEGOVERNMENTISTHEMOSTIMPORTANTAVIATIONSAFETYREGULATORTHISARTICLEPROVIDESTHESTRATEGYFORTHEGOVERNMENTSTRENGTHENINGAVIATIONSECURITYMANAGEMENTTHESTUDYPROVIDESAGOODREFERENCEFORTHEGOVERNMENTTOENHANCETHEAVIATIONSAFETYMANAGEMENTKY的RD8GOVER珊ENT；CIVILAVIATION；SAFETY艙NAGEMENT№NAGEMENTSYSTEM

簡介：西北工業(yè)大學碩士學位論文基于隨機PETRI網的航空電子綜合系統數據總線建模分析姓名耿修堂申請學位級別碩士專業(yè)系統工程指導教師吳勇20040301西北工業(yè)大學碩卜論文基于隨機PETRI網的航空電F綜合系統數據總線的建模分析ABSTRACTTHETHESISCONTENTISMODELLINGANDANALYSISOFINTEGRATEDAVIONICSSYSTEMDATABUSWITHSTOCHASTICPETRINETTHEPURPOSEISOPTIMIZINGBUSTRANSMISSIONSYSTEMBYTHEANALYSISOFINTEGRATEDAVIONICSSYSTEMDATABUSCAPABILITYPARAMETERUTILIZINGTIMEDPETRINETSTOCHASTICPETRINETMODELLINGTOOLANDCOMPUTERTOOLSIMULATINGANDANALYZINGINTEGRATEDAVIONICSSYSTEMDATABUSANDATTAININGSYSTEMTIMECAPABILITYPARAMETERARETHESTUDYINGMETHODOFTHETHESISASARESULTOFSTUDYINGWEGAINTHREESYSTEMTIMECAPABILITYPARAMETEROFMONOLAYERBUSFRAMEWORKANDTWODOUBLEBUSFRAMEWORKDATABUSUTILIZATIONLENGTHOFTHEDATAWAITINGQUEUEANDTIMEOFSYSTEMTIMEDBASINGONFIXEDBCCONTROLSEASONALREPERTOIRETIMEDPETRINETANDSTOCHASTICPETRINETWEALSOTAKETWOCONCLUSIONSBYFOREGOINGRESULTFIRSTOFALLTHESYSTEMBECOMESMOREANDMORECOMPLEXTHESYSTEMDATABUSUTILIZATIONCOPYRESULTTIMEOFSYSTEMTIMEDANDLENGTHOFTHENEWSWAITINGQUEUEBECOMEMOREANDMOREPRECISEBASINGONSTOCHASTICPETRINETATTHESAMETIMETHEMODELISVISUALVIVIDCONCISEANDCURRENTSECONDLYWHENITISTWODOUBLEBUSFRAMEWORKTHEUTILIZATIONOFDATABUSANDLENGTHOFTHEDATAWAITINGQUEUEWILLFALLQUICKLYKEYWORDSINTEGRATEDAVIONICSSYSTEMSTOCHASTICPETRINET1553BDATABUSTIMEDPETRINET

簡介：西北工業(yè)大學碩士學位論文航空高壓直流稀土永磁無刷電機控制技術研究姓名梅彥平申請學位級別碩士專業(yè)電機與電器指導教師馬瑞卿20050301西北工業(yè)大學碩士學位論文ABSTRACTABSTRACTRESPONDTOTHEREQUIREMENTOFANAVIATIONDEPARTMENTTHESPEEDCONTROLTECHNIQUESANDTHERELATIVEAPPLIANCETECHNIQUESOFRAREEARTHPERMANENTMAGNETBRUSHLESSDCMOTORBLDCMWHICHWORKSFORTHENEWHIGHVOLTAGEPOWERSUPPLYSYSTEMOFPLANEISRESEARCHEDINTHISPAPERTHEPAPERMAINLYINCLUDESTHREEPARTSFIRSTBASEONTHECOMPREHENSIVEANALYSISANDSTUDYABOUTTHESTRUCTUREPRINCIPLESANDCONTROLRULESOFBLDCMOTORCONTROLSYSTEMITSCONTROLMETHODTHATUSEDFORHVDCSYSTEMISRESEARCHEDINORDERTEALIZETHEMOTORS“SOFTSTART“ANIDEALSTARTPROCESSIONASOFTWAREPROGRAMANDASTRATEGYOFSPEEDANDCURRENTDOUBLECLOSELOOPCONTROLSYSTEMTIMETHESPEEDAREINTRODUCEDTOLIMITITSSTARTCURRENTATTHESAMECLOSELOOPSYSTEMARESIMULATEDSECONDDEPENDONTHESTUDYOFTHEPRINCIPLESANDTECHNIQUESOFTHEMINIATUREHIGHFREQUENCYSINGLEENDEDFLYBACKSWITCHINGPOWERSUPPLYESPECIALLYTHEPRINCIPLESOFTHESINGLECONTROLCHIPOFSWITCHINGPOWERSUPPLYTOP224YANDTHECALCULATIONANDDESIGNOFHIGHFREQUENCYTRANSFORMER，ASWITCHINGPOWERSUPPLYWHOSECONTROLCHIPISTOP224YISDESIGNEDWHICHACCOMPLISHTHEPOWERTRANSFORMATIONFROM270VDCTO5VDCAND15VDCINTHEMEANINGTIMETHEPROBLEMOFEMCISRESEARCHEDANDSOMEMETHODSTOREDUCETHEINFLUENCESOFEMCAREPUTFORWARDLASTBASEONALLTHOSERESEARCHESABOVEACONTROLLERWHICHUSETHEMICROCONTROLLERCHIPAT89C51ISDESIGNEDITUSESTHESIGNALSTHATCOMEFROMTHEROTORPOSITIONSENSORTOGETTHEMOTORSSPEEDINDIRECTLYANDUSESSOFTWARETOACCOMPLISHTHESIGNALSOFPWMWAVEANDTHESTRATEGYOFSPEEDCLOSELOOPCONTROLTHESIMULATIONABOUTTHECONTROLTHEORYISVERIFIEDBYTHEEXPERIMENTTHISCONTROLLERGUARANTEESTHEMOTORWORKSIN4KINDSOFPATTERNSSAFELYANDTHEWORKSSTABILITYISENSUREDTHROUGHSEVERALKINDSOFANTIDISTURBANCETECHNIQUESTHEEXPERIMENTRESULTSSHOWSTHATTHESWITCHINGPOWERSUPPLYPROVIDEAPERFECTQUALITYPOWERFORTHECONTROLLERTHEMOTORSSPEEDCANBESTABILIZEDORADJUSTEDINCESSANTLYIN4KIND