A New Sliding Mode Control Algorithm of IGC System for Intercepting Great Maneuvering Target Based on EDO

Area of Science:

• Aerospace Engineering
• Control Systems Theory
• Robotics and Automation

Background:

• Effective missile guidance requires robust control systems capable of handling target maneuvers and system uncertainties.
• Traditional integrated guidance and control (IGC) systems face challenges in accurately estimating and compensating for external disturbances and target dynamics.

Purpose of the Study:

• To develop a novel IGC algorithm for enhanced missile interception of maneuvering targets.
• To directly compute rudder deflection commands by integrating sliding mode control with an extended disturbance observer.

Main Methods:

• Formulation of the missile-target engagement problem and establishment of an uncertain IGC dynamic model.
• Design of a second-order extended disturbance observer to estimate disturbances and their derivatives.
• Development of a modified sliding surface and reaching law incorporating the disturbance observer for direct rudder command generation.
• Application of Lyapunov stability theory to rigorously prove system stability.

Main Results:

• The proposed IGC algorithm effectively estimates and compensates for target maneuvers and system uncertainties.
• Simulations demonstrate significant reductions in response time and improved rudder response.
• The method achieves a high probability of successful interception across various target maneuver modes.

Conclusions:

• The integrated guidance and control algorithm offers a superior approach for intercepting maneuvering targets compared to conventional methods.
• The combination of sliding mode control and extended disturbance observation provides a robust and effective solution for IGC systems.
• The developed method enhances interception performance metrics, including speed and accuracy.