简介：ThispaperhasanalyzedtheperturbationsofaGeoX-Sat(virtualsatellite)ingeostationaryorbit(GEO).Andcontrolmethods,strategiesandcalculationprocessesaredesignedoftheEast-West(E/W)station-keepingoftheGeoX-Sat.TheAttitudeandOrbitControlSubsystem(AOCS)providesattitudeinformationandmaintainstherequiredspacecraftattitudeduringallphasesofthemission,startingatspacecraftseparationfromthelaunchvehicleandthroughoutitsoperationallifetime.FortheGeoX-Satexercisingdesign,duetotimelimitations;onlytwomodesofoperationwereconsideredafterassumedlaunchingoperation:normalandstationkeeping.

简介：Basedontheplatformofmobilecarriersatellitetrackinghasawiderangeofapplications.Thepaperadoptstheadvancedmethodoftostepresponseidentify,usingthedataobtainedbytheexperimentmodelofhigh-speedacquisition,usingthemethodoftheleastsquares,finallytheantennacontrolsystemmodelfunctionwasidentified.Makeuseofintegralseparationalgorithm,simulinksimulationandexperimentanalysistosetthecontrolparametersofit.Stimulatethesignalantennacontrolsystemunderinterfering.Theexperimentofthesimulationexperimentshowedthattheantennacontrolsystemmodelisstablewithlittleerror.

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简介：每年CES大展上都会出现让人惊艳的数码产品．无论是大牌小牌．还是西洋派和东洋派都是卯足了劲儿地争奇斗艳。有人高端奢华．有人亲民路线也是一路凯歌。东洋派高性价比路线的代表——东芝就在2011年CES大展上推出了全新超轻薄SatelliteR800系列笔记本。

简介：ThedesignofnewSatelliteLaunchVehicle(SLV)isofinterest,especiallywhenacombinationofSolidandLiquidPropulsionisincluded.ProposedisaconceptualdesignandoptimizationtechniqueformultistageLowEarthOrbit(LEO)boundSLVcomprisingofsolidandliquidstageswiththeuseofGeneticAlgorithm(GA)asglobaloptimizer.ConvergenceofGAisimprovedbyintroducinginitialpopulationbasedontheDesignofExperiments(DOE)Technique.LatinHypercubeSampling(LHS)-DOEisusedforitsgoodspacefillingproperties.LHSisastratifiedrandomprocedurethatprovidesanefficientwayofsamplingvariablesfromtheirmultivariatedistributions.InSLVdesignminimumGrossLiftoffWeight(GLOW)conceptistraditionallybeingsought.SincethedevelopmentcoststendtovaryasafunctionofGLOW,thisminimumGLOWisconsideredasaminimumdevelopmentcostconcept.Thedesignapproachismeaningfultoinitialdesignsizingpurposeforitscomputationalefficiencygivesaquickinsightintothevehicleperformancepriortodetaileddesign.