Global fast dynamic terminal sliding mode control for a quadrotor UAV.

Area of Science:

• Robotics
• Control Systems Engineering
• Aerospace Engineering

Background:

• Quadrotor unmanned aerial vehicles (UAVs) require advanced control for accurate navigation.
• Existing control methods may struggle with finite-time convergence and robustness to disturbances.

Purpose of the Study:

• To develop a flight controller for finite-time position and attitude tracking in quadrotor UAVs.
• To enhance control precision and robustness using a novel sliding mode control technique.

Main Methods:

• A dynamic model of the quadrotor was divided into fully actuated and underactuated subsystems.
• Global fast dynamic terminal sliding mode control (TSMC) was applied to design the flight controllers.
• Lyapunov theory was used to demonstrate the stability of the subsystems.

Main Results:

• The proposed TSMC guarantees finite-time convergence of position and velocity tracking errors to zero.
• The method effectively eliminates the chattering phenomenon inherent in switching control actions.
• Simulations confirm the control method's effectiveness and robustness against external disturbances.

Conclusions:

• The global fast dynamic TSMC offers a robust and high-precision solution for quadrotor UAV flight control.
• This approach enables finite-time tracking performance, crucial for demanding UAV applications.
• The method's stability and effectiveness are validated through rigorous theoretical analysis and simulations.