Single-event, drag-modulated aerocapture has become a promising control scheme in the past decade. However, these architectures suffer from exhausted control authority post-jettison. Multiple drag-skirt jettison events have been shown to enhance aerocapture performance, yet still suffer from unidirectional control capabilities. An apoapsis target biasing method is introduced to improve multi-event, drag-modulated aerocapture accuracy and robustness. Entry trade studies and Monte Carlo methods are used for comparison to the state-of-the-art, assessing performance at 400 and 2000 km apoapsis targets and at entry flight path angles of 5.4 ° and 5.6 ° . Two ballistic coefficient ratio sets are investigated for both two- and three-stage separation event architectures. A two-stage architecture equipped with the biasing method is shown to be capable of reducing mean apoapsis error to zero, while also showing standard deviation reductions in apoapsis error and circularization Δ v by 64.1 and 74.8%, respectively, compared with the state-of-the-art. A biased, three-stage architecture is shown to provide further benefit, reducing apoapsis error standard deviation by 70% relative to an equivalent unbiased architecture and 10.16% relative to a similarly sized two-stage architecture.


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    Title :

    Multi-Event Jettison Guidance Approaches for Drag-Modulation Aerocapture


    Contributors:

    Published in:

    Publication date :

    2022-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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