Direction Cosine

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

Projection coefficients of the thrust vector onto coordinate axes, determined by normalized ratios of costate variables. Direction cosines transform costates into the physical thrust vector direction in optimal control.

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

  • Kluever and Pierson, 1997, Optimal Earth-Moon Trajectories Using Nuclear Electric Propulsion
Improve this page
Last Updated:
Contributors: ouyangjiahong, Ou Yang Jiahong