Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization
This work presents fuel-optimal altitude maintenance of Low-Earth-Orbit (LEO) spacecrafts experiencing non-negligible air drag and J2 perturbation. A pseudospectral (direct) method is first applied to roughly estimate an optimal fuel consumption strategy, which is employed as an initial guess to p...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2015-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_379.pdf |
| _version_ | 1797331386283065344 |
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| author | Kyung-Ha Kim Chandeok Park Sang-Young Park |
| author_facet | Kyung-Ha Kim Chandeok Park Sang-Young Park |
| author_sort | Kyung-Ha Kim |
| collection | DOAJ |
| description | This work presents fuel-optimal altitude maintenance of Low-Earth-Orbit (LEO) spacecrafts experiencing non-negligible air
drag and J2 perturbation. A pseudospectral (direct) method is first applied to roughly estimate an optimal fuel consumption
strategy, which is employed as an initial guess to precisely determine itself. Based on the physical specifications of KOrea
Multi-Purpose SATellite-2 (KOMPSAT-2), a Korean artificial satellite, numerical simulations show that a satellite ascends
with full thrust at the early stage of the maneuver period and then descends with null thrust. While the thrust profile is
presumably bang-off, it is difficult to precisely determine the switching time by using a pseudospectral method only.
This is expected, since the optimal switching epoch does not coincide with one of the collocation points prescribed
by the pseudospectral method, in general. As an attempt to precisely determine the switching time and the associated
optimal thrust history, a shooting (indirect) method is then employed with the initial guess being obtained through the
pseudospectral method. This hybrid process allows the determination of the optimal fuel consumption for LEO spacecrafts
and their thrust profiles efficiently and precisely. |
| first_indexed | 2024-03-08T07:33:43Z |
| format | Article |
| id | doaj.art-fefaad92595748579f3a579029e408e7 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:33:43Z |
| publishDate | 2015-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-fefaad92595748579f3a579029e408e72024-02-02T19:41:43ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092015-12-0132437938610.5140/JASS.2015.32.4.379Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect OptimizationKyung-Ha Kim0Chandeok Park1Sang-Young Park2Astrodynamics and Control Laboratory, Department of Astronomy, Yonsei University, Seoul 03722, KoreaAstrodynamics and Control Laboratory, Department of Astronomy, Yonsei University, Seoul 03722, KoreaAstrodynamics and Control Laboratory, Department of Astronomy, Yonsei University, Seoul 03722, KoreaThis work presents fuel-optimal altitude maintenance of Low-Earth-Orbit (LEO) spacecrafts experiencing non-negligible air drag and J2 perturbation. A pseudospectral (direct) method is first applied to roughly estimate an optimal fuel consumption strategy, which is employed as an initial guess to precisely determine itself. Based on the physical specifications of KOrea Multi-Purpose SATellite-2 (KOMPSAT-2), a Korean artificial satellite, numerical simulations show that a satellite ascends with full thrust at the early stage of the maneuver period and then descends with null thrust. While the thrust profile is presumably bang-off, it is difficult to precisely determine the switching time by using a pseudospectral method only. This is expected, since the optimal switching epoch does not coincide with one of the collocation points prescribed by the pseudospectral method, in general. As an attempt to precisely determine the switching time and the associated optimal thrust history, a shooting (indirect) method is then employed with the initial guess being obtained through the pseudospectral method. This hybrid process allows the determination of the optimal fuel consumption for LEO spacecrafts and their thrust profiles efficiently and precisely.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_379.pdfaltitude maintenancedirect/indirect optimizationfuel optimizationpseudospectral method |
| spellingShingle | Kyung-Ha Kim Chandeok Park Sang-Young Park Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization Journal of Astronomy and Space Sciences altitude maintenance direct/indirect optimization fuel optimization pseudospectral method |
| title | Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization |
| title_full | Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization |
| title_fullStr | Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization |
| title_full_unstemmed | Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization |
| title_short | Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization |
| title_sort | fuel optimal altitude maintenance of low earth orbit spacecrafts by combined direct indirect optimization |
| topic | altitude maintenance direct/indirect optimization fuel optimization pseudospectral method |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_379.pdf |
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