Preliminary design of multiple gravity-assist trajectories

Massimiliano Vasile, Paolo De Pascale

Research output: Contribution to journalArticlepeer-review

124 Citations (Scopus)
154 Downloads (Pure)


In this paper the preliminary design of multiple gravity-assist trajectories is formulated as a global optimization problem. An analysis of the structure of the solution space reveals a strong multimodality, which is strictly dependent on the complexity of the model. On the other hand it is shown how an oversimplification could prevent finding potentially interesting solutions. A trajectory model, which represents a compromise between model completeness and optimization problem complexity is then presented. The exploration of the resulting solution space is performed through a novel global search approach, which hybridizes an evolutionary based algorithm with a systematic branching strategy. This
approach allows an efficient exploration of complex solution domains by automatically balancing local convergence and global search. A number of difficult multiple gravity-assist trajectory design cases demonstrates the effectiveness of the proposed methodology.
Original languageEnglish
Pages (from-to)794-805
JournalJournal of Spacecraft and Rockets
Issue number4
Publication statusPublished - Jul 2006


  • spacecraft
  • trajectories
  • multiple gravity-assist trajectories


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