中文摘要：

针对永磁直线同步电机伺服系统容易受到参数变化、端部效应和负载扰动等不确定性因素影响的问题，采用二阶滑模控制中的螺旋算法设计直线伺服系统的速度和电流控制器。在出现参数变化和阻力扰动时，为保证动子速度严格跟踪其参考信号，同时消除磁阻作用和推力波动的影响，分别独立选取速度和直轴电流的滑模量，并利用基于二阶滑模的鲁棒速度微分器来估计螺旋算法所需要的加速度信号。仿真结果表明该策略对负载和参数的变化具有很强的鲁棒性，同时有效地削弱了抖振现象。

英文摘要：

The performance of permanent magnet linear synchronous motor servo system was influenced by parameter variations, end-effects and load disturbances. Super-twisting algorithm was employed to design robust speed controller and current controller. In order to guarantee mover speed to track its reference signal strictly and eliminate the influence of magnetic resistance and thrust fluctuation, the speed sliding mode and direct axis current sliding mode were selected separately. Then a robust speed differentiator was designed based on second order sliding mode to estimate the acceleration signal that used in super-twisting algorithm. The simulation results show that this strategy has strong robustness against load disturbances and parameters varieties, and attenuates chattering effectively.