改进Terminal滑模永磁直线同步电机控制策略研究

Research of Improved Terminal Sliding Mode Control of Permanent Magnet Linear Synchronous Motor

永磁直线同步电机(PMLSM)作为一种高阶非线性系统,需要通过优化的控制算法来实现伺服系统的高精度和快速响应。非线性控制理论对于非线性系统有较好的控制性能,其中Terminal滑模控制相比较于传统滑模控制,具有收敛精度高的特点,并保留了滑模控制的鲁棒性。分析了PMLSM的数学模型,设计了基于非奇异Terminal位置滑模控制和一个一阶速度滑模面,通过二者的组合实现速度限幅和位置的精确响应。通过MATLAB/Simulink的仿真,结果表明,该方法下的PMLSM的改进Terminal滑模控制具有较高的控制精度和较快的响应速度,在存在外部扰动的情况下也具有较好的鲁棒性。

Permanent magnet linear synchronous motor（PMLSM） was considered as a high order nonlinear system. Thus, the optimization control algorithm was required to realize the high precision and fast response of servo system. Due to the brilliant performance of nonlinear control theory, terminal sliding mode control was applied with high convergence precision and robustness. On base of mathematical model of PMLSM, non singular terminal position sliding mode control and a first order speed sliding mode surface was designed and combined to achieve speed limit and exact response of location. The MATLAB/Simulink simulation results showed that the method of PMISM improved Terminal sliding mode control had high control precision, fast response and good robustness in the presence of external disturbances.