{"id":782,"date":"2016-02-19T19:01:19","date_gmt":"2016-02-19T18:01:19","guid":{"rendered":"http:\/\/sophia.estec.esa.int\/gtoc_portal\/?page_id=782"},"modified":"2025-11-22T14:01:56","modified_gmt":"2025-11-22T13:01:56","slug":"gtoc-9","status":"publish","type":"page","link":"https:\/\/sophia.estec.esa.int\/gtoc_portal\/?page_id=782","title":{"rendered":"GTOC 11 – Dyson sphere"},"content":{"rendered":"\n
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This edition was organised by Ya-zhong Luo<\/strong> and Hong-Xin Shen<\/strong> from \u00a0College of Aerospace Science and Engineering, National University of Defense Technology<\/em> and \u00a0State Key Laboratory of Astronautic Dynamics, Xi\u2019an Satellite Control Center<\/em>. <\/p>\n\n\n\n

Peek at the final leaderboard<\/a>.<\/p>\n\n\n\n

In a nutshell<\/h2>\n\n\n\n

Twelve stations placed in a to-be-found Dyson ring were tasked to build the mega-structure. Ten spacecraft starting from the Earth had to tour the asteroid belt to activate as many asteroids as possible using a minimal propellant consumption. Each activated asteroid had to complete a low-thrust, constant acceleration spiral aimed at reaching a chosen target station repleneshing its building material.<\/p>\n\n\n\n

The files sent by the organizers to describe the problem are:<\/p>\n\n\n\n

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  1. Problem statement<\/a> (final)<\/li>\n\n\n\n
  2. Problem data<\/a> (candidate_asteroids.txt)<\/li>\n\n\n\n
  3. Example Solution<\/a><\/li>\n<\/ol>\n\n\n\n

    The winners<\/h2>\n\n\n\n

    Led by Zhong Zhang<\/strong> and Haiyang Li<\/strong> the team named TsinghuaLAD&509 (Tsinghua University, School of Aerospace Engineering and Shanghai Institute of Satellite Engineering<\/em>) won the competition.<\/p>\n\n\n

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    All the asteroid low-thrust trajectories of the winning solution.<\/figcaption><\/figure>\n<\/div>\n\n\n

    The workshop<\/h2>\n\n\n\n

    The workshop on this competition took take place in December 2021, following this announcement<\/a>.<\/p>\n\n\n\n

    All presentations can be downloaded here<\/a>.<\/p>\n\n\n\n

    Curiosities<\/h2>\n\n\n\n

    The competition ended on the 7th of November, which also was the same day in which the problem was released back in 2005 for the first edition of the GTOC series. In that first edition a team from Tsinghua University, School of Aerospace Engineering, who won this edition, participated ranking last.<\/p>\n\n\n\n

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