| 研究課題/領域番号 |
22K14424
|
|---|
| 研究種目 |
若手研究
|
| 配分区分 | 基金 |
|---|
| 審査区分 |
小区分24010:航空宇宙工学関連
|
|---|
| 研究機関 | 九州大学 |
|---|
研究代表者 |
陳 泓儒 九州大学, 工学研究院, 助教 (50904009)
|
|---|
| 研究期間 (年度) |
2022-04-01 – 2025-03-31
|
| 研究課題ステータス |
中途終了 (2023年度)
|
| 配分額 *注記 |
4,550千円 (直接経費: 3,500千円、間接経費: 1,050千円)
2024年度: 390千円 (直接経費: 300千円、間接経費: 90千円)
2023年度: 2,080千円 (直接経費: 1,600千円、間接経費: 480千円)
2022年度: 2,080千円 (直接経費: 1,600千円、間接経費: 480千円)
|
|---|
| キーワード | J2 perturbation / martian moons / binary asteroids / proximity orbiting / 3-body problem / quasi-periodic orbits / small-body exploration / Hamiltonian function / Canonical tranformation / Quasi-periodic orbits / J2-peturbed problem / Elliptic problem / small planetary moons / Small bodies / Nonheliocentric missions / Orbit design / Stability analysis / Orbit perturbations |
|---|
| 研究開始時の研究の概要 |
The confirmed MMX and HERA-Juventas missions are targeting Martian moons and the binary asteroid Didymoon, respectively, which are secondary bodies orbiting a primary body. Dynamics around these bodies is not like that around the heliocentric small targets ever visited. To enable exploration of non-heliocentric small bodies, it is necessary to gain deeper insights to the dynamical and operational drivers of the orbiting instability and devise strategies coping with the influential perturbation, which will be addressed in this project.
|
| 研究実績の概要 |
The dynamic model, J2-ER3BP+GH, to desribe the orbital dynamics around a small moon is developed. It incorporates the perturbation from the oblatenss on the orbit of the small moon and spacecraft around the moon, and can accomendate a full non-spherical gravity model of the small moon. Even though the model is sophisticated, bounded orbits can still be identified in this model by identifying the center manifold of the associated auxiliary autonomous 8-dimensional system. Baseline orbits around Phobos and Dimorphos from J2-ER3BP+GH become much easier to maintain in the high-fidelity dynamic and control environments.
|
| 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
This research project progresses as planned.
|
| 今後の研究の推進方策 |
The orbiting stability has been improved via the passive approach, namely, the improvement of the validity of the dynamic model and baseline orbits. The next step is to further improve the orbting stability via the active approach. Orbit dynamical features (e.g., unstable directions) will be further analyzed in the J2-ER3BP and orbit control laws will be devised accordingly.
|
