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Volume 42 Issue 6
Jun.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(6): 1156-1161.
JIA Jianhua, LYU Jing, WANG Qiet al. Best position to apply an impulse in a planar swing-by[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(6): 1156-1161. doi: 10.13700/j.bh.1001-5965.2015.0409(in Chinese)
Citation: JIA Jianhua, LYU Jing, WANG Qiet al. Best position to apply an impulse in a planar swing-by[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(6): 1156-1161. doi: 10.13700/j.bh.1001-5965.2015.0409(in Chinese)
shu

Best position to apply an impulse in a planar swing-by

doi: 10.13700/j.bh.1001-5965.2015.0409

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 23 Jun 2015
  • Publish Date: 20 Jun 2016
    Abstract
  • Applying an impulsive thrust during a close encounter with a celestial body can significantly improve the efficiency of the swing-by maneuver. The impulse is usually applied at the periapsis in much literature, but there is no proof that periapsis is the optimal position. In order to study the best position to apply an impulse in a planar swing-by, the powered swing-by is described by the three usual parameters of the standard swing-by maneuver plus the three parameters which specify the magnitude, the direction and the position of the impulse. A set of new analytical equations are derived, including the variation in velocity, energy and angular momentum due to the maneuver as a function of the six parameters. Using these equations, it is possible to find the best position to apply the impulse to maximize the energy change. The results show that periapsis is not the best position, as the application of impulse in the best position is 20% more efficient than the application of impulse at the periapsis in some cases.

     

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