Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980toky.iafcw....t&link_type=abstract
International Astronautical Federation, International Astronautical Congress, 31st, Tokyo, Japan, Sept. 22-28, 1980, 15 p.
Astronomy and Astrophysics
Astronomy
Optimal Control, Solar Probes, Space Exploration, Swingby Technique, Trajectory Optimization, Venus (Planet), Dynamic Programming, Jupiter (Planet), Perihelions, Trajectory Analysis
Scientific paper
This paper discusses a possible usage of multiple Venus swingby in solar probe missions, especially in reducing a perihelion distance. The problem is treated in the frame of optimal control problem. To this end, the state and control variables are defined as well as the criterion function. A forward dynamic programming is adopted to obtain the solution, namely swingby sequences and swingby conditions. A family of detailed optimal multiple Venus swingby trajectories is depicted with relevant data. Results show that the minimum perihelion distance obtainable is well below a half of direct launch result, even with the second or third Venus encounters. Discussion is given concerning the limiting condition under which the absolute minimum of perihelion distance is obtained. The Jupiter swingby, an alternative means to reduce a perihelion distance, is also discussed in conjunction with the present scheme.
Tanabe Tatsuyoshi
Yokota Hiroshi
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