The bounded-impulse approach to low-thrust interplanetary trajectory optimization is widely used. In an effort to efficiently implement this approach using NASA’s OpenMDAO optimization software, the authors have implemented implicit formulations of the forward shooting/backwards-shooting methods commonly used in bounded-impulse models. These implicit approaches allow for vectorization of the underlying calculations which can significantly reduce runtime in interpreted languages. An implicit approach may be either converged by using an underlying nonlinear solver to converge the state propagation, or as a constraint in an optimizer-driven multiple-shooting approach. Significant computational efficiency gains are realized through the utilization of the modular approach to unified derivatives. Further computational efficiency is achieved by capitalizing on the sparsity of the constraint Jacobian matrix. This work demonstrates that a vectorized multiple-shooting approach for propagating a state-time history is superior in terms of computational efficiency as the number of segments in the state-propagation is increased.


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    Titel :

    Implicit Formulations of Bounded-Impulse Trajectory Models for Preliminary Interplanetary Low-Thrust Analysis


    Beteiligte:

    Kongress:

    AIAA Scitech 2020 Forum ; 2020 ; Orlando, FL, United States


    Erscheinungsdatum :

    06.01.2020



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    IMPLICIT FORMULATIONS OF BOUNDED-IMPULSE TRAJECTORY MODELS FOR PRELIMINARY INTERPLANETARY LOW-THRUST

    Falck, Robert D. / McCarty, Steven L. / Pekosh, Jeffrey et al. | TIBKAT | 2020


    Implicit Formulations of Bounded-Impulse Trajectory Models for Preliminary Interplanetary Low-Thrust Analysis

    Falck, Robert D. / McCarty, Steven L. / Pekosh, Jeffrey et al. | AIAA | 2020


    Optimum two-impulse transfers for preliminary interplanetary trajectory design

    HULKOWER, N. D. / LAU, C. O. / BENDER, D. F. | AIAA | 1984


    Optimum two-impulse transfers for preliminary interplanetary trajectory design

    Hulkower, N. D. / Lau, C. O. / Bender, D. F. | NTRS | 1984


    Low variable thrust interplanetary trajectory data

    Nime, Edward J. / MacKay, John S. | TIBKAT | 1968