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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：在这份报纸，用在土中的轴承和频率大小的联合集合的一个新被动修改重申的扩大Kalman过滤器(MIEKF)集中了惯性(ECI)坐标被建议。MIEKF的一个新测量更改方程被修改高斯牛顿重复的客观功能导出。一个新获得方程和重复结束标准被使用最大的可能性的估计的性质获得。接近的秒顺序线性化州的繁殖方程，州的转移的Jacobian矩阵和测量方程在卫星被导出二身体的运动。MIEKF，重申的扩大Kalman过滤器(IEKF)和扩大Kalman过滤器(EKF)的追踪的表演从STK8.1通过模仿的数据经由蒙特卡罗模拟被比较。模拟结果显示建议MIEKF是可能的消极地由一颗高地球轨道卫星追踪低地球通报轨道卫星，并且更高让比IEKF和EKF追踪精确。

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

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