基于 LESO 的新型自适应鲁棒滚转通道控制算法

The roll channel mathematical model of missiles flying at large angles of attack is characterized by severe nonlinearity, instability, multivariable coupling, and uncertainty. An adaptive robust control method is designed to solve the issues. A linear extended state observer (LESO) is used to estimate aerodynamic nonlinear perturbations based on finite information of the missile. A novel adaptive sliding mode control law is employed together with a LESO to estimate and compensate disturbance online. The rapid adjustment of adaptive parameters can ensure the stability of the system and shorten the response time, thereby allowing for rapid convergence of the roll angle and roll angle rate, weakening chattering, and enhancing disturbance rejection ability. The simulation results show that the proposed control method has significant improvements in rapidity and robustness compared to traditional linear methods and also exhibits fault-tolerant control ability in typical fault handling scenarios.