Attitude Autopilot Design Based on Fuzzy Linear Active Disturbance Rejection Control

Abstract

In view of the multi-source uncertainty disturbance problem during flight control, the attitude autopilot based on fuzzy linear active disturbance rejection control (F-LADRC) was proposed. A second-order linear active disturbance rejection controller was designed to stabilize the attitude angle of the missiles, and the frequency domain characteristics were analyzed. Firstly, it was proved that the linear expansion state observer (LESO) is convergent and can achieve the indifference estimation of the system state variables and total disturbance. Then, it was proved that the linear active disturbance rejection control (LADRC) possesses disturbance rejection characteristics, and the influence of the bandwidth parameter on the disturbance rejection performance of the system was analyzed. The fuzzy control was used to adjust the parameter adaptively. Finally, the tracking, robustness, and anti-disturbance of the F-LADRC attitude autopilot were verified by performing simulations.

Research on Dynamic Performance of Independent Metering Valves Controlling Concrete-Placing Booms Based on Fuzzy-LADRC Controller

“…Combining LADRC with fuzzy control can further improve the dynamic performance of the system; for example, Zhou, X. used an FLADRC to control medium-and high-voltage distribution networks [36], Sun, C. used an FLADRC to control an industrial quadrotor UAV [37] and flying robot [38], Zhang, F. used an FLADRC to control a deep-sea AUV [39], Han, D. used an FLADRC to control autopilot attitude [40], Feng, X. used an FLADRC to control an IPMSM [41], and Qing, Y. used an FLADRC to control a permanent magnetelectromagnetic hybrid suspension platform [42].…”