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oai:www.ideals.illinois.edu:2142/85122 2023-07-11 col_2142_5131 col_2142_14800 com_2142_5130 com_2142_14799 com_2142_234

Conway, Bruce A. Chen, Jyun-Jye Felipe 2015-09-25T22:34:29Z 2015-09-25T22:34:29Z 10000-01-01 1997 1997 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. Made available in DSpace on 2015-09-25T22:34:29Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9717260.pdf: 5063760 bytes, checksum: 3ffd6774c626170308dcfcfbfa666209 (MD5) Previous issue date: 1997 Embargo set by: Seth Robbins for item 86403 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 147 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997. http://hdl.handle.net/2142/85122 (MiAaPQ)AAI9717260 eng Engineering, Mechanical Neighboring Optimal Feedback Control for Trajectories Found by Collocation and Nonlinear Programming text Aerospace Engineering Aerospace Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.