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dc.contributor.authorAlemany, Kristina
dc.contributor.authorBraun, Robert D.
dc.date.accessioned2007-06-22T21:22:11Z
dc.date.available2007-06-22T21:22:11Z
dc.date.issued2007-01
dc.identifier.urihttp://hdl.handle.net/1853/15067
dc.description2007 AAS/AIAA Space Flight Mechanics Meeting January 2007, Sedona, Arizona.en_US
dc.description.abstractElectric propulsion has recently become a viable option for robotic missions, enabling shorter flight times, fewer required planetary gravity assists, smaller launch vehicles, and/or larger payloads. Trajectory design of these missions often relies on local optimization of the low-thrust trajectories using starting points for departure and arrival dates and selection of gravitational swing-bys based on previous experience. Global optimization of a low-thrust trajectory with multiple targets and gravity assists, however, is a difficult problem, due to the multi-modality and large size of the design space. In choosing analysis techniques, there exists an important tradeoff between the accuracy of the results and computing time required. This paper presents the difficulty of solving this global optimization problem, using the design of a multiple asteroid tour mission as an example. Furthermore, this paper presents an overview of the methods available for both low-thrust trajectory optimization and global optimization, along with recent improvements made, and assesses their efficacy and applicability to solving a multiple target/multiple gravity assist problem.en_US
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.relation.ispartofseriesSSDL ; AAS 07-211en_US
dc.subjectAsteroidsen_US
dc.subjectElectric propulsionen_US
dc.subjectGlobal optimizationen_US
dc.subjectGravity assistsen_US
dc.subjectLow-thrust trajectoryen_US
dc.titleSurvey of Global Optimization Methods for Low-Thrust, Multiple Asteroid Tour Missionsen_US
dc.typePaperen_US


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