›› 2013, Vol. 33 ›› Issue (6): 17-25.doi: 10.3780/j.issn.1000-758X.2013.06.003

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Earth-to-MarsTransferOrbitOptimizationBasedonMeshRefinement

 GU  Liang-Xian1, ZHAO  Ji-Song2   

  1. (1SchoolofAstronautics,NorthwesternPolytechnicalUniversity,Xi′an710072)
    (2BeijingAerospaceTechnologyInstitute,Beijing100074)  
  • Received:2012-12-02 Revised:2013-03-20 Online:2013-12-25 Published:2013-12-25

Abstract: Ageneralnonsmoothtrajectoryoptimizationapproachwaspresented.Themeshrefinementprocedurebasedondatacompressondyadicgridswasimprovedtoincreasetheefficiency,usabilityandflexibility,andwasthencombinedwiththelocalcollocationmethodwhichtookadvantageofscaling,sparsityanddifferentnumericaldifferentiationofnonlinearprogramming(NLP).NumericalsimulationonEarth-to-Marstransferorbitoptimizationdemonstratesthattheapproachcapturesnonsmoothregionsexactlywithdensitymeshandhasthepotentialofon-boardoptimization.Furthermore,theapproachcapturesnon-smoothregionsofstateseventhoughthemeshisrefinedaccordingtothecontrolvariables.ForEarth-to-Marstransferorbitoptimization,itisbettertodefinethethrustanglein[0,360°)thanthatin[-180°,180°).

Key words: Collocationmethod, Meshrefinement, Earth-to-Marstransferorbit