航天器低冲击分离控制技术分析-analysis of spacecraft low impact separation control technology.docx

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航天器低冲击分离控制技术分析-analysis of spacecraft low impact separation control technology.docx

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航天器低冲击分离控制技术分析-analysis of spacecraft low impact separation control technology

AbstractAsthekeycomponentinthespacecraft,separationdevicedirectlyaffectsthecompletionofthemission,thereforeobtainsincreasingattention.Theloadingoftraditionalfireseparationdeviceishuge,leadingtoapotentialimpactonspacecraft.Inordertosolvethisproblem,anewtypeofseparationdeviceisinneed,whichownstheadvantagesofsmallseparationloading,largeloadbearing,lessrequiredenergyaswellasacontrollabilityinseparationspeed.Takingthemobileplatformastheresearchobject,thethesisdesignsanewtypeofpneumaticseparationandunlockingdeviceandstudythecontrollabilityintheprocessofseparation.First,withtheknowledgeofmechanics,thesatelliteplatform,togetherwiththesmallsatellite’sorbitdynamicsequationwhichisrelativetotheinertialcoordinatesystemisestablished.UndertheguidanceoftheLagrangeequation,thesatelliteplatform’sattitudedynamicequationwithflexiblecomponentsanditskinematicequationarededuced,layingafoundationforsubsequentcontrollerdesign.Inaccordancewithtechnique,thenewpneumaticseparationandunlockingdeviceisdesigned,themathematicalmodelofnewseparationequipmentdeducedandtheseparationspeedcontrollerdevised.Onthisbasis,theinfluenceoftheseparationdevice’sdesignparametersontheseparationprocessisstudied.Theinfluence,oftheimpactloadproducedbyseparationmechanism,onsatelliteplatform’sorbitalmovementisanalyzed.Theinfluence,oftheimpactmomentgeneratedbyseparationmechanism’sdecentralizationandtheflexibilityofsolarpanels,onsatelliteplatform’sattitudedynamicmovementisexplored.BasedontheLyapunovstabilitytheorem,PDcontrollerandslidingmodevariablestructurecontrolleraredesignedrespectively.Theattitudestabilityandthecontrolprecisionofthetwocontrollersarecomparedwhenthemobileplatformmeetstheimpactload.Thestrainratefeedbackcompensatorisdesignedaccordingtothecouplinginfluencebetweentheflexiblevibrationofsolarpanelsandtheplatform.Atlast,thesimulationisconductedontheseparationcontrolsystemthroughsimulationsoftware.Meanwhile,amathematicmodelofthepyrotechnicallyactuatedseparationdeviceisestablished.Thesimulationresultsdemonstrat