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Prescribed Performance Attitude-Tracking Control for Rigid Satellite Under External Disturbance.

Chunyu Zhang1, Ting Wang2, Min Wan1

  • 1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.

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Summary
This summary is machine-generated.

This study introduces an anti-disturbance prescribed performance control (PPC) scheme for satellite attitude control. The method ensures accurate tracking despite external disturbances, achieving precise control within a set time.

Keywords:
prescribed performance control (PPC)prescribed-time disturbance observer (PTDO)satellite attitude systemtracking control

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Area of Science:

  • Aerospace Engineering
  • Control Systems Theory
  • Robotics

Background:

  • Satellite attitude control is critical for mission success.
  • External disturbances pose significant challenges to maintaining accurate satellite orientation.
  • Existing control methods may struggle with rapid disturbance rejection and guaranteed performance bounds.

Purpose of the Study:

  • To develop an anti-disturbance prescribed performance control (PPC) scheme for rigid satellite attitude control.
  • To ensure accurate attitude tracking under external disturbances within a prescribed time.
  • To enhance the robustness and performance of satellite attitude control systems.

Main Methods:

  • Development of a prescribed-time disturbance observer (PTDO) for rapid and precise disturbance estimation.
  • Introduction of an appointed-time performance function (ATPF) to establish asymmetric performance boundaries.
  • Application of Lyapunov stability theory to guarantee system stability and error boundedness.

Main Results:

  • The proposed PTDO accurately estimates external disturbances within a prescribed time.
  • The PPC scheme ensures that the satellite attitude system achieves desired tracking performance with guaranteed convergence time.
  • The control strategy demonstrates uniform ultimate boundedness of disturbance estimation error and system errors.

Conclusions:

  • The developed anti-disturbance PPC scheme effectively addresses the satellite attitude control problem under external disturbances.
  • The integration of PTDO and ATPF provides a robust solution for achieving precise and time-bound attitude tracking.
  • Numerical simulations validate the superior performance and effectiveness of the proposed control strategy.