Abstract This paper presents a skip entry guidance algorithm that uses a numerical predictor–corrector and a patched corridor for low-lifting capsules returning from the Moon. The longitudinal and lateral channels are assumed to be decoupled. The bank angle magnitude profile is parameterized using piecewise linear segments with respect to a normalized energy. The shape of the bank-vs-energy profile is determined using a single piecewise-defined variable. The predicted longitudinal bias is nullified using a false position method. The adverse effects of aerodynamic and atmospheric uncertainties are mitigated using an on-board estimating strategy during the trajectory prediction. A patched corridor is devised to manage the lateral state based on analytical derivations and reasonable approximations. The sign of the bank angle is reversed when the boundary of the patched corridor is violated. Dispersed simulations are implemented in a three-degree-of-freedom dynamical context, and the results demonstrate the high performance of the proposed guidance algorithm under stressful testing conditions.

    Highlights A longitudinal guidance algorithm with the false position method is formulated. A patched corridor is designed to manage the timing of bank reversals. An existing estimation method is extended with a function fitting technique.


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    Titel :

    Skip entry guidance using numerical predictor–corrector and patched corridor


    Beteiligte:
    Luo, Zong-Fu (Autor:in) / Zhang, Hong-Bo (Autor:in) / Tang, Guo-Jian (Autor:in)

    Erschienen in:

    Acta Astronautica ; 117 ; 8-18


    Erscheinungsdatum :

    2015-07-24


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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    Luo, Zong-Fu / Zhang, Hong-Bo / Tang, Guo-Jian | AIAA | 2014



    Comparison of Numerical Predictor-Corrector and Apollo Skip Entry Guidance Algorithms

    Brunner, C. / Lu, P. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2010