基于扰动估计补偿的PMLSM固定时间积分滑模控制

为了提高永磁直线同步电机(PMLSM)控制系统的动态响应速度和鲁棒性，提出了一种基于扰动估计补偿的固定时间积分滑模控制（DFISMC）方法。首先，在积分滑模面的基础上，引入了一种固定时间滑模控制算法，保证系统可以在固定时间内到达平衡点。其次，设计了一种随系统状态动态调整的控制率增益函数f(s)，进一步加快了收敛速度。最后，设计自适应超螺旋扰动观测器估计内部和外部不匹配扰动，并采用前馈补偿的方式将观测值引入控制律，增强了系统的抗干扰能力。仿真结果表明，DFISMC方法不仅保证了系统全局鲁棒性，而且有效提高了系统的跟踪精度和响应速度。

Fixed Time Integral Sliding Mode Control for PMLSM Based on Disturbance Estimation Compensation

In order to improve the dynamic response speed and robustness of permanent magnet linear synchronous motor (PMLSM) control system, a fixed-time integral sliding mode control (DFISMC) method based on disturbance estimation compensation was proposed. Firstly, based on the integral sliding mode surface, a sliding mode control algorithm with fixed-time was introduced to ensure that the system can reach the equilibrium point within a fixed-time. Secondly, a control rate gain function f(s) was designed to adjust dynamically with the state of the system, which further accelerates the convergence rate. Finally, an adaptive superspiral disturbance observer was designed to estimate the internal and external mismatched disturbances, and the observed values were introduced into the control rate by feedforward compensation, which enhances the anti interference ability of the system. The simulation results show that the DFISMC method not only guarantees the global robustness of the system, but also improves the tracking accuracy and response speed of the system.