Citation: | JIANG Ling, WANG Yue, XU Shijieet al. Effect of planet's third-body gravitational perturbation on aerobraking of moon's explorer[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(4): 759-764. doi: 10.13700/j.bh.1001-5965.2017.0249(in Chinese) |
An averaged orbital dynamics model for a natural satellite aerobraking was established and an Titan explorer was simulated to study the notable planet's third-body gravitational perturbation during the process. Firstly, non-singular Milankovitch elements were introduced to represent the orbital motion. A semi-analytical orbital equation was obtained considering moon's atmospheric drag, oblateness perturbation, and planet's gravitational perturbation. Secondly, taking Titan explorer as an example, simulations and analysis were carried out with different azimuth choices between Saturn and apse line when atmospheric drag was excluded and included. The results show that different initial azimuth of Saturn with respect to the apsidal line would cause that eccentricity and periapsis height oscillate in different intervals, which will ultimately influence the aerobraking result.
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