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Initial Results of a New Method for Optimizing Low-Thrust Gravity-Assist Missions

Maiwald, Volker (2017) Initial Results of a New Method for Optimizing Low-Thrust Gravity-Assist Missions. International Symposium on Space Technology and Science, 3-9 Jun 2017, Matsuyama, Japan.

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Further exploring our solar system is continuously becoming more challenging, thus gravity-assists and low-thrust propulsion are typical mission enablers. Combining both has the potential to improve performance even more. Typically, optimization for low-thrust gravity-assist missions is conducted only for the trajectory. To improve results, it is however desirable to include finding the gravity-assist in the optimization. This paper presents a method, able to evaluate a large number of mission candidates, defined by gravity-assist maneuvers and the trajectories in between, with the gravity-assist partner as one control variable. A heuristic search is conducted under application of a shape based trajectory model. The paper explains the structure of the control variables and their repercussions on the optimization and presents the initial results obtained for three major questions: Is the method overall usable? Can the search space be pruned with constraints based on the maximum obtainable Δv and the pool of possible gravity-assist partners? Can evolutionary algorithms be used to optimize such missions with the given method? The basic method has been effective in finding optimal gravity-assist partners for single-gravity-assist missions and shows potential for multi-gravity-assist missions as well. Derived from the optimization performance some conclusions about the search space topography are drawn.

Item URL in elib:https://elib.dlr.de/113304/
Document Type:Conference or Workshop Item (Speech)
Title:Initial Results of a New Method for Optimizing Low-Thrust Gravity-Assist Missions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Maiwald, Volkervolker.maiwald (at) dlr.dehttps://orcid.org/0000-0002-4591-0089
Date:June 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:gravity-assist optimization, low-thrust trajectory
Event Title:International Symposium on Space Technology and Science
Event Location:Matsuyama, Japan
Event Type:international Conference
Event Dates:3-9 Jun 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Systemanalyse Raumsegment (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > System Analysis Space Segment
Deposited By: Maiwald, Volker
Deposited On:26 Jul 2017 10:51
Last Modified:26 Jul 2017 10:51

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