Anti-windup compensator based on LADRC and its application in the attitude control of near-space aircraft.

A novel Anti-windup Compensator (AWC) is proposed for the Linear Extended State Observer (LESO) in the Linear Active Disturbance Rejection Controller (LADRC). Unlike classical AWC structures, this compensator augments LADRC by dynamically adjusting state variables and extended state compensation within the LESO, resulting in the method being termed AWC-LESO. The adjustment is based on the degree of saturation, effectively mitigating the impact of input saturation on the system.Stability conditions for the modified system are derived via Lyapunov functions and Linear Matrix Inequality (LMI) methods, with validation through convex optimization, demonstrating system stability and identifying a maximal subset of the estimated domain of attraction.This method is applied to design an autopilot for a near-space hypersonic vehicle prone to controller saturation. Comparative simulation experiments on a mathematical model of a near-space supersonic vehicle validate the effectiveness of the proposed approach, confirming its practical applicability.