Song Yanyu, Li Qingdang, Zhang Mingyue
College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266061, China.
College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao, 266061, China.
Sci Rep. 2024 Oct 12;14(1):23889. doi: 10.1038/s41598-024-73478-6.
To address the electromechanical coupling and multi-source disturbance problems of the seeker stabilized platform, this paper constructs an electromechanical coupling model of the seeker stabilized platform based on the Lagrange-Maxwell equation. To mitigate the influence of electromechanical coupling on the control performance of the seeker, a super-twisting controller based on a fractional-order terminal sliding mode surface (FOSTSMC) is proposed. Additionally, to handle various disturbances in the system, this paper introduces a method that combines the extended state observer (ESO) with the proposed controller to enhance the system's stability and anti-disturbance performance. The Lyapunov function is designed to prove that the proposed controller can reach a convergence state within finite time. Finally, the proposed control method is compared with PID control, fuzzy PID control, linear sliding mode control, and super spiral control combined with a disturbance observer (DOB). Multiple simulation experiments demonstrate that, under the influence of electromechanical coupling and multi-source disturbance, the FOSTSMC-ESO significantly improves the stability and anti-disturbance performance of the seeker stabilization platform.
为解决导引头稳定平台的机电耦合和多源干扰问题，本文基于拉格朗日 - 麦克斯韦方程构建了导引头稳定平台的机电耦合模型。为减轻机电耦合对导引头控制性能的影响，提出了一种基于分数阶终端滑模面（FOSTSMC）的超扭曲控制器。此外，为处理系统中的各种干扰，本文引入了一种将扩展状态观测器（ESO）与所提出的控制器相结合的方法，以提高系统的稳定性和抗干扰性能。设计李雅普诺夫函数以证明所提出的控制器能在有限时间内达到收敛状态。最后，将所提出的控制方法与PID控制、模糊PID控制、线性滑模控制以及结合干扰观测器（DOB）的超螺旋控制进行比较。多个仿真实验表明，在机电耦合和多源干扰的影响下，FOSTSMC - ESO显著提高了导引头稳定平台的稳定性和抗干扰性能。
