Optimal Sliding Mode Control, OSMC

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

A composite control method combining optimal control with sliding mode control. The sliding surface embeds the feedback gain of linear quadratic optimal control so that sliding motion is optimal with respect to a quadratic performance index, while a discontinuous switching term compensates for uncertainties and disturbances. Compared with pure optimal control, it offers stronger robustness; compared with pure sliding mode control, it achieves lower fuel consumption. In cislunar station-keeping, it performs comparably to LQR under weak perturbations and yields smaller position deviations under strong perturbations such as solar radiation pressure.

Application Value

The 最优滑模控制 concept is applied in cislunar space research, providing technical support or analytical methods for lunar exploration missions.

  • Non-Singular Fast Terminal Sliding Mode Control, NFTSM
  • Double Threshold Sliding Mode Control, DTSM

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