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25 October 2013, Volume 33 Issue 5 Previous Issue    Next Issue

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DesignMethodofHighPrecisionPerimeterTrussAntennaonBoard ZHANG Hua-Zhen, MA Xiao-Fei, SONG Yan-Ping, CHEN Guo-Hui, LI Tuan-Jie 2013, 33 (5):  1-6.  doi: 10.3780/j.issn.1000-758X.2013.05.001 Abstract ( 1612 )   PDF (422KB) ( 1622 )   Save Owingtoitslightweight,highprecisionandhighstiffness,theperimetertrussantennaisthecurrentstateofartofthelargedeployableantenna.Theantennaprecisionisbecomingmoreandmorecriticalwiththeadvancementoftheinspaceapplications.Firstly,thecompositionandfundamentaltorealizethehighprecisionperimetertrussantennawasintroduced.Basedontherealengineeringrealization,considerationsofachievingthehighprecision,designanalysismethod,onorbitthermaldeformationwasdiscussedindetail.Secondly,themethodologyoftwomeshtensionsymmetrylayoutandellipseperimetertrussforimprovingantennaprecisionwasproposed.Symmetrylayoutcangetgoodstressdistributionandsystemstiffness.Sothermalenvironmentcan′tchangethesurfacecoordinationevidently.Ellipseperimetertrusscanrealizeallnodeontherigidpoint,onthesametime,ellipsestructureismorestablethanthecyclestructure.Therearetwointersectionstylesbetweentheellipseandcyclestructures,suchasinclinationanduprightnessintersection,andinclinationstylecanrotateangelarbitrarilysothatsomediversenodeassignmentcombinationcanbeselected.   Related Articles | Metrics

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OnMidcourseCorrectionofMoonEarthReturnTrajectoryBasedonExplicitGuidance HU Jun, ZHOU Liang 2013, 33 (5):  7-14.  doi: 10.3780/j.issn.1000-758X.2013.05.002 Abstract ( 1624 )   PDF (437KB) ( 1388 )   Save TheresearchonthemidcoursecorrectionofMoonEarthreturntrajectoryisnecessary,asnominalorbitisperturbedbyseveraldisturbancesourcesandboundaryconstraintsiscomplicated.Thesolutionofcharacteristicvelocitywasgotthroughtheexplicit guidancemethodbyusingtheiterationsalgorithmbasedonthedifferencebetweenthetwobody orbitandprecisetrajectory.Asthemidcoursecorrectionstrategywasdividedintomoonsectionandearthsection,theexplicitguidancecorrectionschemesofMoonEarthreturntrajectorybasedonsubsectionlocationpointspredictionwaspresented.Theschemecansatisfythereentrypointparametersconstraintsandcanbeusedwidelyinpractice,asthealgorithmissimplifiedtoovercomedisadvantagesofthedifferentialcorrectionalgorithmwhichrequiresanumericalJacobianmatrix.Finally,theadaptabilityoftheschemewasvalidatedbynumericalsimulationandMonteCarlosimulation. Related Articles | Metrics

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LimitEquationsforHypervelocityImpacts onHoneycombSandwichPanels JIA Guang-Hui, OUYANG Zhi-Jiang 2013, 33 (5):  15-21.  doi: 10.3780/j.issn.1000-758X.2013.05.003 Abstract ( 1921 )   PDF (477KB) ( 1312 )   Save Toexplorethepredictiveabilityforthepenetrationcharacteristicsoftheimpact limitequationsabouthoneycombsandwich, 3typesofballisticlimitequations,equivalentmethodsonthepanelthickness, and131CFRPexperimentaldatahadbeeninvestigated, andthepredictiveabilityoftheequationshadbeencalculated. TheresultsshowthatthepredictedprobabilitiesofMETequationtootherdatasourceareallover80%, soMETequationcanbepreferredintheengineeringpredictionfortheprotectivestructure. ThesafetypredictionratesofSRLquationtootherdatasourceandselfdatasourceareallreach100%, soSRLequationsuitsforthedesignofhighreliabilityprotectionstructure. Finally, theideaofoptimizingcoefficientsandspeedcutoffvaluefortheimpactlimitequationswasstudiedtoimprovethepredictiveability. Related Articles | Metrics

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Pulsar/CNSIntegratedNavigationMethodBasedonImprovedKinematicandStaticFilterforDeepSpaceExplorer WANG Yi-Di, ZHENG Wei, AN Xue-Ying, SUN Shou-Ming 2013, 33 (5):  22-28.  doi: 10.3780/j.issn.1000-758X.2013.05.004 Abstract ( 1477 )   PDF (435KB) ( 1015 )   Save APulsar/CNSintegratednavigationalgorithmbasedontheimprovedkinematicandstaticfilterwasproposedThemeasurementofpulsarandthestellaranglemeasurementwerefusedbytheimprovedkinematicandstaticfilter,inwhichtheUKFwasusedasthekinematicfiltertodealwiththestellaranglemeasurementatafastsamplingvelocityandtheEKFwasusedasthestaticfiltertodealwiththepulsarmeasurementataslowsamplingvelocityTheproposedimprovedkinematicandstaticfiltercanavoidthecorrelationsbetweenthefusiondatasetsofdifferentsensors.Thesimulationresultsshowthattheproposedintegratednavigationsystemcanimprovetheperformanceoftheautonomousnavigationsystemadoptedbydeepspaceexplorer. Related Articles | Metrics

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InfluenceofMagneticComponentDistributionofSatelliteonEliminatingRemanantMagneticFieldbyGradientMethod ZHOU Bin, WANG Jin-Dong 2013, 33 (5):  29-34.  doi: 10.3780/j.issn.1000-758X.2013.05.005 Abstract ( 1732 )   PDF (363KB) ( 1303 )   Save Errorcoefficientofdualprobegradientmethodcanreach0.5to0.3inengineering,thatmeansonly50%to70%ofthesatelliteremanenceinterferencecanbeeliminated.Theprincipleofthedualprobegradientmethodwaspresentedtoeliminatesatelliteremanenceandthesourcesofdualprobegradientmethoderrorwereinvestigated.Furthermore,theinfluenceofthesatelliteremanencecomponentdistributiononthemagneticcorewasanalyzed.Andthekeyroleofpositionalrelationshipbetweenthemagneticcoreanddualprobeonthedualprobegradientmethodwasdescribed.Undertheconditionthatthemagneticcorepositionwasdeterminedandthedualprobeinstallationdirectionpointedtothecore,theerrorsofthedualprobegradientmethodwasminimized.Simulationresultsshowthatthedualprobegradientmethoderrorcoefficientcandecreasefrom0.4to0.03orlessbyoptimizingremanencecomponentdistributionanddualprobeinstallationlocation. Related Articles | Metrics

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AsymptoticStabilizationforDeploymentandRetrievalofaTetheredSatelliteSystem YU Ben-Song, JIN Dong-Ping 2013, 33 (5):  35-42.  doi: 10.3780/j.issn.1000-758X.2013.05.006 Abstract ( 1690 )   PDF (419KB) ( 1374 )   Save Anasymptoticstabilitystrategyfordeploymentandretrievalofatetheredsatellitesysteminellipticalorbitswasstudied.Firstly,thestabilityofaninplanetetheredsatellitesystemmovinginanellipticalorbitwasanalyzed,anovelratecontrolforstabilizingthedeploymentandretrievalwasobtained,andthestabilityconditionsforthecontrolweregivenbasedonLyapunovstabilitytheory.Then,aratebasedcontrolmethodtosuppressthelargeswingaroundthelocalverticalpositionoftetheredsatellitesystemwaspresented.Undersuchcontrolstrategy，thedeploymentandretrievalofthetethermadeanasymptoticstablemotiontowardstothepreassignedpitchangle.Theresultsshowthatthereexistsanorbitalregion,onwhichtheretrievalprocesscankeepasymptoticstability.Tooptimizetheeffectofretrievalcontrol,thepartitioningandsegmentingstrategiesontheorbitwereproposed.Finally,theproposedcontrollaw,stabilityconditions,andcontrolstrategiesweredemonstratedbythenumericalsimulations. Related Articles | Metrics

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ResearchonLargeRangeHighprecisionAngleMeasurementAlgorithminRVDMicrowaveDockingRadar YAN Qi, YANG Rui-Qiang, ZONG Nian-Ke, ZHANG Peng, CAI Chun-Gui 2013, 33 (5):  43-48.  doi: 10.3780/j.issn.1000-758X.2013.05.007 Abstract ( 1365 )   PDF (336KB) ( 1363 )   Save Thetraditionalanglemeasurementmethodsofmicrowaveradararedifficulttosatisfyaccuracyrequirementsundertherendezvousanddockingnearfieldconditions.Toachievethehighprecisionanglemeasuringinawiderangeincludingnearfieldaswellasfarfield,anewalgorithmbasedonphasedifferencecomplexvectormatchingwasproposed.Firstly,anobjectfunctionwasdefinedtoquantifythesimilarityofthephasedifferencecomplexvector.Secondly,anonlinearprogrammingmodelwasestablishedtoestimatetheazimuthandelevationanglesandthesolvingstepsofthemodelweredescribedindetail.Finally,theresultsofnumericalsimulation,airborneflighttestandanechoicchamberexperimentprovetheeffectivenessofthealgorithmwithahighprecisionof0.12°. Related Articles | Metrics

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AttitudeDeterminationofSpacecraftBasedonIRAPFAlgorithms LI Hai-Jun, ZHAO Guo-Rong 2013, 33 (5):  49-55.  doi: 10.3780/j.issn.1000-758X.2013.05.008 Abstract ( 1481 )   PDF (361KB) ( 1216 )   Save AimingatthelargeinitialerrorandthestrongnonlinearproblemexistedinSpacecraftattitudedetermination,animprovedregularizedauxiliaryparticlefilter(IRAPF)algorithmwasproposed.TheregularizedParticleFilter (RPF) waslinkedwiththeauxiliaryparticlefilter(APF),andthefastGausstransform(FGT)wasintroducedintothealgorithmtoimproveconvergenceefficiency.Thisalgorithmcanrestrainparticledegenerating,optimizingsamplingbyusingthenewestobservedparticles.ByintroducingFGT,thecalculationwasreduced30%comparedwithRAPFmethodandtherealtimefeaturewasimproved.Simulationresultsprovethevalidityofthealgorithm. Related Articles | Metrics

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H-ModeGasIonizationModelforPassiveSpaceborneHydrogenMaserandParametersOptimization WANG Yong, QIU Shi, LI Jian-Qing 2013, 33 (5):  56-61.  doi: 10.3780/j.issn.1000-758X.2013.05.009 Abstract ( 1635 )   PDF (381KB) ( 1017 )   Save AnH-modeionizationsystemwasdesignedfortherequirementsoflowpowerconsumptionandlowelectromagneticinterferenceofthepassivespacebornehydrogenmaser，whichadoptingaplanarrolledcoilantennatosupplypower.Andamathematicmodelofionizationwasbuilt.Firstly,thedistributionmodelofelectromagneticfieldintheionizationbubbleandtheionizationmechanismofthecertainmethodwerededucedfromtheMaxwellequations.Andthen,theionizationpunctureconditioncriterionanditsmathematicmodelwereacquired.Finally,parametersofionizationdevicewereoptimizedbythecriterionequation.Bothsimulationandmeasurementshowthattheionizationmodeliseffective,andtheoptimizeddesignparametershaveimprovedtheperformanceofpowerconsumptionandelectromagneticinterference,andthetotalDCpowercanbelessthan2W. Related Articles | Metrics

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ASetofNovelOrbitalElementsModelingApproachUsingQuaternion CAO Jing, YUAN Jian-Ping, LUO Jian-Jun 2013, 33 (5):  62-68.  doi: 10.3780/j.issn.1000-758X.2013.05.010 Abstract ( 1495 )   PDF (294KB) ( 1603 )   Save Focusedonthesingular,indeterminationandthecalculationinefficiencyoftraditionalorbitalelementsbasedonEulerangles,asetofnovelorbitalelementsusingquaternionwasproposed.Therelationshipsofthenovelelementsandtheclassicorbitalelements,aswellasthenovelelementsandthepositionandvelocityintheinertialcoordinatewerebuilt.TheGaussperturbationequationswerederivedbasedonthenovelelements.Thevalidityandadvantageswerevalidatedbythepropagationoftheorbitunder J2 rturbation.Theresultsshowthatthenovelelementscannotonlyavoidthesingularandindeterminationincircularandequatorialorbit,butalsowithhighercalculationefficiencyandaccuracyforitsoperationwithouttrigonometricfunction. Related Articles | Metrics

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SOSDesignforControlofLargeAttitudeManeuversofSatellites HE Zhen, MENG Fan-Wei, WANG Guang-Xiong, ZHOU Di 2013, 33 (5):  69-75.  doi: 10.3780/j.issn.1000-758X.2013.05.011 Abstract ( 1381 )   PDF (365KB) ( 1533 )   Save Becauseofthecouplingeffectbetweentheangularvelocitiesofeachaxis,thenonlineardynamicsofthesatellitemustbeconsideredforthecontroloflargeattitudemaneuvers.Besides,thekinematicsdifferentialequationoftheattituderepresentationisalsononlinear.Thesumofsquares(SOS)approachwasproposedasasynthesismethodforthenonlinearcontrolsystemdesign.ItisshownthatthefinalresultoftheSOSdesignhasclearphysicalmeanings,thoughitisanumericalmethod.Infact,theresultingcontrollawcanbeviewedasanonlinearversionofthePDcontrol.ToavoidthepeakvalueofthecontrolinputcausedbytheintrinsicpropertiesoftheMRPs,asaturationdesignwasproposed.Theconvergenceofthetimeresponseundersaturationcanbeprovedbythepassivitynatureofthesystem.AdiagonaldominanceprocedurewasalsoproposedtoreducethenumericalerrorsoftheSOSapproach.TheproposedSOSmethodcanbeusedtosolveanalyticallyunsolvablenonlinearproblemsandwouldhaveawideareaofapplicationsinthenearfuture. Related Articles | Metrics

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EffectofParts′StiffnessonGeneralStiffnessofSpaceManipulatorJoint WEI Qing-Qing, WANG Yao-Bing, LIU Zhi-Quan 2013, 33 (5):  76-81.  doi: 10.3780/j.issn.1000-758X.2013.05.012 Abstract ( 1837 )   PDF (319KB) ( 1435 )   Save Thespacemanipulatorjointhastoadoptthehighreductionrategearbox.TheFEMshoweditsdisadvantageinthestiffnessanalysisandjointweightreductionduetothecomplexityofthegearbox.Thestiffnessmodelwasestablishedwiththelumpedparametermethodandthestiffnessseriesprinciple.Theinfluenceofallparts′stiffnessonthegeneralstiffnessofthespacemanipulatorjointwasanalyzedandanewwaytooptimizethehighreductionratejointwasgiven. Related Articles | Metrics