| 研究課題/領域番号 |
22K14424
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| 研究機関 | 九州大学 |
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研究代表者 |
陳 泓儒 九州大学, 工学研究院, 助教 (50904009)
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| 研究期間 (年度) |
2022-04-01 – 2025-03-31
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| キーワード | Hamiltonian function / Canonical tranformation / Quasi-periodic orbits / J2-peturbed problem / Elliptic problem / small planetary moons |
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| 研究実績の概要 |
To guide orbiting operations around a non-heliocentric moon, it is necessary to take into account the nonspherical gravity field of the planet and the eccentricity of the moon's orbit. It is difficult to compute bounded orbits in such a non-spherical field perturbed elliptic three-body problem. The applicant
worked with Prof. Stefano Caletta on the Hamiltonian function of the perturbed elliptic problem and we attempt to establish the canonical transformation between the circular-restricted three problems (CR3BP), such that the Hamiltonian function of the perturbed problem has a form identical to the one in CR3BP. We can then convert the periodic orbits in the CR3BP to the bounded orbits in the perturbed elliptic problem. The applicant is also working on the development of the J2-perturbed elliptic-restricted three-body problem and the computation of the invariant torus (or quasi-periodic orbits), which are bounded, in the developed model.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The current progress is the same as the planned schedule.
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| 今後の研究の推進方策 |
The applicant will aim to perfect the J2-perturbed elliptic-restricted three-body problem and develop the approach to computation of the bounded quasi-periodic orbits in the developed dynamic model.
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| 次年度使用額が生じた理由 |
Due to the pandemic, the budget was not effectively used. The remaining amount will be used for remuneration to enhance collaboration and the enhancement of computing hardware.
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