Finite-Time Attitude Stabilization Adaptive Control for Spacecraft with Actuator Dynamics

Area of Science:

• Aerospace Engineering
• Control Systems Theory
• Robotics

Background:

• Spacecraft attitude stabilization is crucial for mission success.
• Actuator dynamics introduce complexities in control system design.
• Finite-time control offers improved transient performance over traditional methods.

Purpose of the Study:

• To develop a finite-time control law for spacecraft attitude stabilization considering actuator dynamics.
• To design an adaptive control strategy for unknown actuator parameters.
• To ensure high-precision attitude control performance.

Main Methods:

• Analysis of actuator dynamic properties.
• Derivation of a finite-time control law using a double fast terminal sliding mode manifold.
• Proposal of an adaptive law to estimate unknown actuator time-matrix information.
• Lyapunov-based stability analysis.

Main Results:

• The proposed adaptive control law guarantees finite-time convergence of spacecraft attitude.
• Simulations demonstrate the effectiveness of the control scheme.
• High-precision attitude control is achieved despite actuator dynamics.

Conclusions:

• The developed finite-time adaptive control law is effective for spacecraft attitude stabilization.
• The method robustly handles unknown actuator dynamics.
• The approach enables high-precision control for spacecraft.