Anti-Windup compensation of linear active disturbance rejection control for near space vehicle autopilot

Few investigation interests have been focused on anti-windup design under Active Disturbance Rejection Control scheme. In this study, an anti-windup compensation strategy under ADRC scheme is proposed. The strategy is also a special case of the unified framework for anti-windup compensation. By feeding the actual plant input into the extended state observer, the extended state is correctly estimated while actuator saturation emerges, then the adequate controller output is accordingly produced to alleviate the adverse influence of actuator saturation on closed-loop dynamics. The approach is applied to a hypersonic near space vehicle pitch-axis autopilot design with fin-deflection saturation, the capability and effectiveness of the proposed approach is demonstrated by the results.