Aircraft Autopilot Pitch Control Based on Fuzzy Active Disturbance Rejection Control

Considering the high demands of modern flight control system and the existence of various uncertain disturbances in flight, an active disturbance rejection control (ADRC) strategy based on fuzzy control is proposed, so as to realize the high performance of aircraft pitch control. The nonlinear active disturbance rejection controller is designed to improve the ability of anti-interference, meanwhile, fuzzy control is adopted to adjust the ADRC parameters online, which makes control performance better. Simulation results show that compared with conventional PID the Fuzzy-ADRC strategy can suppress the disturbances quickly and efficiently, with higher control accuracy, stronger robustness and so on. The results are of important value for aircraft pitch control in practice.