Weak Instability

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The instability characteristic of orbits near triangular libration points under solar gravitational perturbation. Unlike the strong instability (fast exponential divergence) at collinear points, triangular points have weaker instability, allowing orbits to remain nearly stable for extended periods with minimal station-keeping. This property makes dynamical substitutes viable host orbits for navigation satellites.

Application Value

This term has significant application value in cislunar space missions。In the orbital design phase, engineers use relevant theories for trajectory optimization；In navigation and orbit determination, it is used to improve measurement accuracy；In attitude control and orbit maintenance tasks, it ensures stable spacecraft operation。In practical applications, parameter optimization and algorithm adaptation can be combined with mission requirements to improve mission success rate and resource utilization efficiency。

  • Characteristic Exponents
  • Capture Docking Phase
  • Lunar Flyby Transfer

References

  • Liu et al. 2024, A novel autonomous navigation constellation in the Earth–Moon system
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Contributors: ouyangjiahong, Ou Yang Jiahong