Active disturbance rejection controller for loitering unit with parameter uncertainty

The wings of loitering unit could be unfolded in flight. In view of the model parameters uncertainty caused by the structural change, based on the vehicle's longitudinal and lateral motion equations, combined with the characteristics of ADRC, active disturbance rejection attitude controller is designed. Six degrees of freedom nonlinear simulation model is operated with Simulink and aerodynamic parameters are gained by Fluent. The robustness of this controller is verified by the aerodynamic parameter perturbation method. Actual flight experiments show that the active disturbance rejection attitude control algorithm can improve the robustness of the system with model uncertainty and the performance of the flight control system. So it has high practical value.