Engine Limitation

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

Physical constraints of the thruster on control commands, including minimum thrust (ignition threshold) and maximum thrust (output ceiling). When commanded thrust falls below the minimum, actual control input is zero; when it exceeds the maximum, actual input is saturated. Typical values for cislunar station-keeping are minimum thrust acceleration of 10^-7 m/s^2 and maximum of 5x10^-4 m/s^2.

Application Value

Navigation system design and implementation must account for observation geometry, error propagation, and signal transmission delay. This concept supports positioning accuracy evaluation, navigation filter design, and constellation optimization.

  • Lunar Surface Receiver
  • Geometric Dilution of Precision, GDOP
  • Satellite-to-Satellite Tracking, SST

References

  • Zhang and Wang 2022 Continuous-thrust station-keeping of cis-lunar orbits using optimal sliding mode control with practical constraints
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Contributors: ouyangjiahong, Ou Yang Jiahong