2023 Fiscal Year Research-status Report
Orbit Design and Control for Non-Heliocentric Small-Body Missions
| Project/Area Number |
22K14424
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| Research Institution | Kyushu University |
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Principal Investigator |
陳 泓儒 九州大学, 工学研究院, 助教 (50904009)
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Keywords | J2 perturbation / martian moons / binary asteroids / proximity orbiting / 3-body problem / quasi-periodic orbits / small-body exploration |
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| Outline of Annual Research Achievements |
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.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
This research project progresses as planned.
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| Strategy for Future Research Activity |
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.
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| Causes of Carryover |
Duties in school hinders full efforts in spending the budget of this project.
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