The risk to a crewed vehicle arising from potential re-contact with fragments from an explosive breakup of any jettisoned spacecraft segments during entry has long sought to be quantified. However, great difficulty lies in efficiently capturing the potential locations of each fragment and their collective threat to the vehicle. The method presented in this paper addresses this problem by using a stochastic approach that discretizes simulated debris pieces into volumetric cells, and then assesses strike probabilities accordingly. Combining spatial debris density and relative velocity between the debris and the entry vehicle, the strike probability can be calculated from the integral of the debris flux inside each cell over time. Using this technique it is possible to assess the risk to an entry vehicle along an entire trajectory as it separates from the jettisoned segment. By decoupling the fragment trajectories from that of the entry vehicle, multiple potential separation maneuvers can then be evaluated rapidly to provide an assessment of the best strategy to mitigate the re-contact risk.


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    Titel :

    Mesh-Based Entry Vehicle and Explosive Debris Re-Contact Probability Modeling


    Beteiligte:
    M. A. McPherson (Autor:in) / G. F. Mendeck (Autor:in)

    Erscheinungsdatum :

    2011


    Format / Umfang :

    12 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Mesh-Based Entry Vehicle and Explosive Debris Re-Contact Probability Modeling

    McPherson, M. / Mendeck, G. / American Institute of Aeronautics and Astronautics; Conferderation of European Aerospace Societies | British Library Conference Proceedings | 2011



    Mesh-Based Entry Vehicle and Explosive Debris Re-Contact Probability Modeling

    McPherson, Mark A. / Mendeck, Gavin F. | NTRS | 2011