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1、PreliminaryStudyforMannedSpacecraftwithEscapeSystemandH-IIBRocketByTakaneImada,MichioIto,ShinichiTakataJapanAerospaceExplorationAgency,Tsukuba,JapanE-mail:imada.takane@jaxa.jpKeyword:MannedTransportation,H-II,HTV,EscapeSystem1IntroductionJAXAannounceditslong-termvision
2、forthenext20yearsThispaperusesseveraldatafromHTVasun-mannedbutcalledas"JAXAVisiontoward2025"inApril2005.Inthesmarttransportationvehicleandlaunchcapabilitydataofvision,JAXAdeclaredtokeepestablishingspaceH-IIBrocketforestimationasreasonableandrealisticastransportationsys
3、temswiththegreatestreliabilityandpossible.Fig.1.isanartisticimageforthelaunch.Thisimagecompetitivenessintheworld.CertainlytheJAXA'sownuses3-dimensionalmodelbuiltthroughthepreliminarymannedspacecraftisoneofthegoalsofthesereliabletrade-offstudy.Itincludesclarificationofn
4、ecessarytransportationsystems.Eventoughthedevelopmenthasnotdevelopmentitemsformannedspacecraftfromun-mannedstartedyet,JAXAwilllaunchthecombinationoflargestvehicles.un-mannedspacevehicleandmostpowerfulrocketinJapan,Also,itisemphasizedinthispaperaboutthemissingpartHTVand
5、H-IIBinthenextyear.ThefirstflightofthemwillofcurrentHTVandH-IIBformannedflight,theabortsystembecomeoneoftheimportantmilestonesinJAXA'slong-termduringpowerflight.LaunchEscapeSystem(LES)isvision.Then,wewillbeabletogotothenextsteptowardmandatoryforhumantransportandshouldb
6、einvestigatedmannedspacecraft.Thepurposeofthispaperistoestimatefromtheearlydesigningprocess,buthasnotbeendoneintheoverallconfigurationandsizeofmannedspacecraft,thenJAXAyet.InpreviousmannedprograminUSandRussia,thesummarizedtheabortanalysisformannedflightandmassofLESsare
7、morethanhalfofcrewmodulesandflightdevelopmentstepsasthepreparationforformalstudycyclespathoflaunchvehiclesarerestrictedtoallowcrewtoescapestartsinthenextstep.inallphasesondemand.So,theconfigurationandsizeofLESwasinvestigatedinthispaperwitheachabortscenarioasthefirstste
8、pofestimation.AborttrajectoriesareparametricanalyzedinSection4usingasampleofnominalflightpathsuitableformannedvehicle
