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• W4387169199 abstract "This study investigates the preliminary trajectory design for high-thrust missions to near-Earth asteroids (NEAs), considering distance and phase angle constraints during the approaching phase to enable pre-rendezvous optical navigation and the scientific identification of asteroids. A global optimization algorithm called monotonic basin hopping is used to design Δv-optimal impulsive trajectories both with and without constraints. Comparisons reveal that extending the final leg of the unconstrained reference trajectory and incorporating a few deep-space maneuvers in that final leg can yield a constrained trajectory with a Δv increase of only a few percent. The effects of the phase angle and minimum distance constraint on Δv are also examined. The results indicate that in Δv-optimal constrained trajectories, an additional deep-space maneuver enables the redistribution of maneuvers in the last leg to ideally insert the spacecraft into the constraint cone. However, additional small maneuvers may be necessary at times to ensure that the spacecraft remains within the cone. Based on these findings, we present a two-step approach for the preliminary design of constrained trajectories for NEA missions based on global optimization algorithms. This approach serves as a valuable tool for initial mission design and trade-off analyses involving constraints, fuel usage, and transfer durations." @default.
• W4387169199 created "2023-09-30" @default.
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• W4387169199 date "2023-09-29" @default.
• W4387169199 modified "2023-10-11" @default.
• W4387169199 title "Analysis of Preliminary Impulsive Trajectory Design for Near-Earth Asteroid Missions under Approaching Phase Constraints" @default.
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• W4387169199 doi "https://doi.org/10.3390/aerospace10100855" @default.
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