Close Lunar Flyby Plane Change Transfer

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

A low-energy transfer method that uses the out-of-plane velocity component generated by a close lunar flyby to provide orbital plane inclination change, instead of relying on the departure impulse. In DRO-to-Earth low-energy transfers, the out-of-plane component of the departure impulse can be as low as 5 m/s, while the close flyby provides over 200 m/s of z-direction velocity change. This makes the low-energy transfer cost nearly independent of target orbit inclination, whereas direct transfer cost increases significantly due to the larger out-of-plane impulse.

Application Value

近距lunar飞越可提供超过200 m/s of z 方向velocity变化, makelowcantransfer代价几乎不随targetorbit倾角increase而上升. 这一特性对high倾角targetorbithas important significance.

Related Concepts

• Libration Point Orbit
• Invariant Manifold
• Impulsive Maneuver
• Halo Orbit

References

• Zhang et al. 2021