›› 2015, Vol. 35 ›› Issue (3): 26-.doi: 10.3780/j.issn.1000-758X.2015.03.004

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TrajectoryOptimizationofElectricSailBasedonParticleSwarmAlgorithm

WANGYu,WEIYanming,LIYong,YUYang,BIANBingxiu   

  1. (1BeijingInstituteofControlEngineering,Beijing100080)(2InstituteofTelecommunicationSatellite,ChinaAcademyofSpaceTechnology,Beijing100094)
  • Online:2015-06-25 Published:2015-06-25

Abstract: Theelectricsailisaninnovativenonpropellantpropulsioninspacewhichtakesadvantageof
themomentumofthesolarwind.Theminimumtimeinterplanetarytransferproblemoftheelectricsailwasstudied.ThemissionscenariosabouttransferringfromtheEarthtotheMarsandVenuswereinvestigated,usingacontinuoussteeringlawmodel,inapolarinertialframe.Twodirectmethodsbasedontheparticleswarmoptimization(PSO)algorithmwereproposed,whichavoidedsolvingthetwopointboundaryvalueproblem(TPBVP)whichwassensitivetotheinitialvalueofthecostatevariables.Thefirstmethodusedtheshootingmethodtodiscretizedthecontrolvariables,transformingtheoptimalcontrolproblemintoaparameteroptimizationproblemofnonlinearpropramming.BasedonthePSOalgorithm,thenearoptimaltransfertrajectorywasobtained.Thesecondmethodfocusedonthecharacteristicsthatallthecontinuouscontrollawscanbefittedusingthepolynomialfunctionundercertainprecision.Acontrollawwasdesignedtoapproximatetheoptimaltransfertrajectorybasedontheanalysisoftheresultsfromthefirstmethod,andthePSOalgorithmwasusedtooptimizetheparametersofthedesignedcontrollaw.Thesimulationresultsshowthatbothmethodshavetheadvantagesoftherandominitialvariableselection,largeconvergencerangeandgoodrobustness.

Key words: Electricsail, Trajectoryoptimization, ParticleswarmalgorithmInterplanetaryexploration