Multifidelity design of low-thrust resonant captures for near-Earth asteroids

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dc.contributor.authorNeves, Rita
dc.contributor.authorSánchez, Joan-Pau
dc.date.accessioned2019-01-24T19:35:50Z
dc.date.available2019-01-24T19:35:50Z
dc.date.issued2018-11-26
dc.description.abstractThe design of a space trajectory is strongly linked to the gravitational and non-gravitational environment and the dynamical frameworks required to model it. These dynamical models may range from low to high fidelity, with corresponding computational costs. This paper proposes a multifidelity approach for the computation of nearly resonant trajectories with the Earth. This framework is used to compute trajectories for the capture of near-Earth asteroids into libration point orbits of the Sun – Earth system. The transfer is first computed in a suitable low-fidelity model, the Keplerian map, and a multifidelity approach is subsequently used to refine the solution from an impulsive approximation into a low-thrust transfer in the circular restricted three-bodyproblem. The entire trajectory follows a nearly resonant motion with the Earth, lasting less than two synodic periods; starting when the retrieval spacecraft attaches itself to the asteroid, they will encounter the Earth twice, being captured into the target orbit at the end of the second encounter. A velocity change maneuver is carried out at the beginning of the motion, so that the first encounter with the Earth provides a gravitational perturbation resulting on a reduction of overall propellant costs of the transfer. The developed framework is very flexible in terms of the desired accuracy and allows for the low computational cost exploration of a vast number of possible trajectories. The obtained low-thrust transfers yield, for six asteroids, a much higher retrievable mass in comparison with direct capture trajectories, which do not undertake Earth-resonant encounters.en_UK
dc.identifier.citationNeves R, Sanchez JP. (2019) Multifidelity design of low-thrust resonant captures for near-Earth asteroids. Journal of Guidance, Control, and Dynamics, Volume 42, Issue 2, 2019, pp. 335-346en_UK
dc.identifier.cris21909205
dc.identifier.issn0731-5090
dc.identifier.urihttps://doi.org/10.2514/1.G003599
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13850
dc.language.isoenen_UK
dc.publisherAIAAen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.titleMultifidelity design of low-thrust resonant captures for near-Earth asteroidsen_UK
dc.typeArticleen_UK

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