Title:
Multi-Tiered Approach to Constellation Maneuver Optimization for Low-Thrust Station-Keeping

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Jaunzemis, Andris D.
Roscoe, Christopher W. T.
Holzinger, Marcus J.
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Abstract
This paper presents a multi-tiered approach to constellation-wide optimization of low-thrust station-keeping maneuvers. Starting from the general problem of constellation maneuver optimization, a tractable solution is presented for stationkeeping. The approach utilizes a gradient-descent algorithm to efficiently drive each satellite toward its nominal orbit, encapsulating this trajectory optimization in an outer-loop genetic algorithm to optimize within discrete and non-differentiable constellation-level constraints. The output trajectories are validated and refined in a high-fidelity environment using NASA's General Mission Analysis Tool. A concrete example with operational constraints is presented, and limits of the computation driven assumptions in the tractable solution are assessed.
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2017-02
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