The science objective of NASA's Dawn Discovery mission is to explore the giant asteroid Vesta and the dwarf planet Ceres, the two largest members of the main asteroid belt. Dawn successfully completed its orbital mission at Vesta. The Dawn spacecraft has complex, difficult to quantify, and in some cases severe limitations on its attitude agility. The low-thrust transfers between science orbits at Vesta required very complex time varying thrust directions due to the strong and complex gravity and various science objectives. Traditional low-thrust design objectives (like minimum change in velocity or minimum transfer time) often result in thrust direction time evolutions that cannot be accommodated with the attitude control system available on Dawn. This paper presents several new optimal control objectives, collectively called thrust direction optimization that were developed and turned out to be essential to the successful navigation of Dawn at Vesta.


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    Titel :

    Thrust Direction Optimization: Satisfying Dawn's Attitude Agility Constraints


    Beteiligte:

    Kongress:

    AAS/AIAA Spaceflight Mechanics Meeting ; 2013 ; Kauai, HI, United States


    Erscheinungsdatum :

    2013-02-10


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch






    Thrust Direction Optimization: Satisfying Dawn's Attitude Agility Constraints (AAS 13-343)

    Whiffen, G.J. / American Astronautical Society / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2013


    Dawn's Exploration of Vesta

    Rayman, Marc D. / Mase, Robert A. | NTRS | 2012


    Spacecraft Attitude Estimation Under Agility Constraints

    Schiemenz, Fabian | BASE | 2015

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