{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/85122"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/85122","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Neighboring Optimal Feedback Control for Trajectories Found by Collocation and Nonlinear Programming","abstract":"On August 9, 1995, because of a launch vehicle failure the Koreasat 1 satellite was placed into an orbit that was 3,400 nautical miles (6,351 km) lower than the planned geostationary transfer orbit. The Lockheed-Martin company rescue team performed a plan which did put the satellite on station but which consumed about half of the satellite's attitude control and station keeping fuel supply. However the sequence of maneuvers which was used to put the satellite on-station was not determined optimally. In this work it is shown how much fuel might have been saved in this case if the satellite rescue had employed optimal control theory. An optimal solution is found using the DCNLP method and incorporating the most important operational constraints.","abstract_html":"On August 9, 1995, because of a launch vehicle failure the Koreasat 1 satellite was placed into an orbit that was 3,400 nautical miles (6,351 km) lower than the planned geostationary transfer orbit. The Lockheed-Martin company rescue team performed a plan which did put the satellite on station but which consumed about half of the satellite's attitude control and station keeping fuel supply. However the sequence of maneuvers which was used to put the satellite on-station was not determined optimally. In this work it is shown how much fuel might have been saved in this case if the satellite rescue had employed optimal control theory. An optimal solution is found using the DCNLP method and incorporating the most important operational constraints.","abstract_has_math":false,"creators":["Chen, Jyun-Jye Felipe"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Conway, Bruce A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T22:34:29Z","date_published":"2015-09-25T22:34:29Z","updated_at":"2026-07-22T22:26:24Z","subjects":["Engineering, Mechanical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9717260"],"render_values":[{"text":"(MiAaPQ)AAI9717260","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/85122","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Conway, Bruce A."]},{"key":"dc:creator","label":"Author","values":["Chen, Jyun-Jye Felipe"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T22:34:29Z","10000-01-01","1997"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Mechanical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/85122","(MiAaPQ)AAI9717260"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["On August 9, 1995, because of a launch vehicle failure the Koreasat 1 satellite was placed into an orbit that was 3,400 nautical miles (6,351 km) lower than the planned geostationary transfer orbit. 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The Lockheed-Martin company rescue team performed a plan which did put the satellite on station but which consumed about half of the satellite's attitude control and station keeping fuel supply. However the sequence of maneuvers which was used to put the satellite on-station was not determined optimally. In this work it is shown how much fuel might have been saved in this case if the satellite rescue had employed optimal control theory. An optimal solution is found using the DCNLP method and incorporating the most important operational constraints.","Made available in DSpace on 2015-09-25T22:34:29Z (GMT). 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