Finite-time attitude tracking control for spacecraft based on backstepping method with input saturation.
1Harbin University, Harbin, China.
Plos One
|June 18, 2025
Summary
This study presents new finite-time controllers for spacecraft attitude tracking, enhancing robustness against disturbances and ensuring control torque limits. The continuous designs are chattering-free, validated by simulations.
Area of Science:
- Aerospace Engineering
- Control Systems Theory
Background:
- Spacecraft attitude tracking is crucial for mission success.
- External disturbances and control input saturation pose significant challenges.
Purpose of the Study:
- To develop robust, finite-time attitude tracking controllers for spacecraft.
- To address external disturbances and input saturation issues.
Main Methods:
- Utilized the backstepping method for controller design.
- Introduced an improved adaptation law for disturbance robustness.
- Incorporated hyperbolic functions and auxiliary systems to handle input saturation.
Main Results:
- Designed two continuous, chattering-free finite-time controllers.
- Demonstrated robustness to external disturbances.
- Ensured control torques remain within predetermined limits.
Conclusions:
- The proposed finite-time control strategies are effective for spacecraft attitude tracking.
- The controllers offer improved robustness and handle input saturation.
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