The Distributed Spacecraft Attitude Control System Simulator(PhD)

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1、TheDistributedSpacecraftAttitudeControlSystemSimulator:FromDesignConcepttoDecentralizedControlJanaL.SchwartzDissertationsubmittedtotheFacultyoftheVirginiaPolytechnicInstituteandStateUniversityinpartialfulfillmentoftherequirementsforthedegreeofDoctorofPhilosophyinAerospaceEngineeringDr.ChristopherD

2、.Hall,CommitteeChairDr.MaryE.Kasarda,CommitteeMemberDr.HanspeterSchaub,CommitteeMemberDr.DanielJ.Stilwell,CommitteeMemberDr.CraigA.Woolsey,CommitteeMemberJuly7,2004Blacksburg,VirginiaKeywords:AirBearingTable,SpacecraftSimulator,FormationFlying,AttitudeEstimation,ParameterEstimationc2004,JanaL.Sch

3、wartzTheDistributedSpacecraftAttitudeControlSystemSimulator:FromDesignConcepttoDecentralizedControlJanaL.Schwartz(ABSTRACT)Aspacecraftformationpossessesseveralbenefitsoverasingle-satellitemission.How-ever,launchingafleetofsatellitesisahigh-cost,high-riskventure.Onewaytomitigatemuchofthisriskistodem

4、onstratehardwareandalgorithmperformanceinground-basedtestbeds.ItistypicallydifficulttoexperimentallyreplicatesatellitedynamicsinanEarth-boundlaboratorybecauseoftheinfluencesofgravityandfriction.Anairbearingprovidesaverylow-torqueenvironmentforexperimentation,therebyrecapturingthefreedomofthespaceenv

5、ironmentaseffectivelyaspossible.Dependinguponcon-figuration,air-bearingsystemsprovidesomecombinationoftranslationalandrotationalfreedom;thethreedegreesofrotationalfreedomprovidedbyasphericalairbearingareidealforinvestigationofspacecraftattitudedynamicsandcontrolproblems.Aninterestinexperimentaldemo

6、nstrationofformationflyingleddirectlytothedevelop-mentoftheDistributedSpacecraftAttitudeControlSystemSimulator(DSACSS).TheDSACSSisauniquefacility,asitusestwoair-bearingplatformsworkinginconcert.ThusDSACSSprovidesapairof‘spacecraft’threedegreesofattitudefreedomeach.ThroughuseoftheDSACSSweareabletor

7、eplicatetherelativeattitudedynamicsbetweennodesofaformationsuchasmightberequiredforco-observationofaterrestrialtarget.Manydissertationspresentanewmathematicaltechniqueorproveanewtheory.Thisdissertationpresentsthedesign