基于扰动观测器的非奇异模糊滑模无人船编队控制

Nonsingular Fuzzy Sliding-mode Formation Control of Unmanned Surface Vehicles Based on a Disturbance Observer

摘要:

针对含有模型参数不确定性、外界干扰与抖振现象的无人船编队问题，提出了一种基于扰动观测器的非奇异模糊终端滑模编队控制方法。首先，将领航者–跟随者与人工势场法相结合，获得无人船的编队构型并保证无碰撞现象；其次，基于 Lyapunov 能量函数设计出模糊控制规则，消除了控制器中的抖振问题； 进而，提出了一种扰动观测器来补偿未知动态和外界干扰，增强了系统的鲁棒性和稳定性。通过理论分析和仿真结果验证了所提控制方法的有效性。基于所设计的编队控制方法，无人船最终可形成期望的编队构型。

Abstract:

In order to solve formation control problems of model parameter uncertainty，external disturbances and chattering phenomena，a nonsingular fuzzy terminal sliding-mode formation control method based on a disturbance observer is proposed. Firstly，the leader-follower is combined with the artificial potential field method to achieve the formation configuration of unmanned surface vehicles while ensuring collision avoidance. Secondly， fuzzy control rules are designed based on Lyapunov energy function to eliminate chattering phenomena in the controller. Furthermore，a disturbance observer is proposed to compensate for unknown dynamics and external disturbances，which enhances the robustness and stability of the system. The effectiveness of the proposed control method is verified through theoretical analysis and simulation results. Based on the designed formation control method，unmanned surface vehicles ultimately achieve the desired formation configuration.