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Disturbance Observer-Based Model Predictive Control for Multi-Frequency Interference Suppression in Space Laser
Yang Chen1, Mochi Tan1, Lin Ge1
1School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Sensors (Basel, Switzerland)
|May 27, 2026
Summary
A new disturbance observer-model predictive control (DOB-MPC) architecture improves space laser communication by reducing tracking errors. This synergistic approach enhances beam pointing stability for reliable data transmission in challenging space environments.
Area of Science:
- Aerospace Engineering
- Control Systems
- Optical Communication
Background:
- Reliable data transmission in space laser communication demands precise beam pointing control.
- Tracking residuals caused by multi-frequency disturbances degrade system performance.
Purpose of the Study:
- To develop a novel control architecture for suppressing multi-frequency disturbance-induced tracking residuals.
- To enhance the accuracy and stability of beam pointing control in space laser communication systems.
Main Methods:
- A synergistic disturbance observer and model predictive control (DOB-MPC) architecture was developed.
- A frequency-decoupled disturbance observer estimated multi-frequency disturbances.
- Model predictive control compensated for time-delay effects and incorporated disturbance estimates.
Main Results:
- The DOB-MPC architecture demonstrated over 25% improvement in dynamic response.
- Residual error reduction exceeded 80% compared to conventional methods.
- Experimental validation confirmed the architecture's effectiveness for space laser tracking.
Conclusions:
- The proposed DOB-MPC framework effectively suppresses multi-frequency disturbances.
- This control strategy significantly enhances beam pointing precision for space laser communication.
- The cooperative control mechanism offers a robust solution for reliable space data transmission.
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