A Smoothed Eclipse Model for Solar Electric Propulsion Trajectory Optimization
| Autor: | Jonathan Aziz, Jacob A. Englander, Daniel J. Scheeres, Jeffrey S. Parker |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
021103 operations research
Spacecraft Ion thruster business.industry Computer science Solar eclipse Photovoltaic system 0211 other engineering and technologies 02 engineering and technology Trajectory optimization Propulsion 01 natural sciences Physics::Space Physics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Differential dynamic programming Astrophysics::Earth and Planetary Astrophysics Aerospace engineering business 010303 astronomy & astrophysics Eclipse |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN. 17:181-188 |
| ISSN: | 1884-0485 |
| DOI: | 10.2322/tastj.17.181 |
| Popis: | Solar electric propulsion (SEP) is the dominant design option for employing low-thrust propulsion on a space mission. Spacecraft solar arrays power the SEP system but are subject to blackout periods during solar eclipse conditions. Discontinuity in power available to the spacecraft must be accounted for in trajectory optimization, but gradient-based methods require a differentiable power model. This work presents a power model that smooths the eclipse transition from total eclipse to total sunlight with a logistic function. Example trajectories are computed with differential dynamic programming, a second-order gradient-based method. |
| Databáze: | OpenAIRE |
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