一种改进非奇异终端的滑模控制策略

Research on Improved Non-singular Terminal Sliding Mode Control Strategy

针对非奇异终端滑模控制方法收敛速度慢等缺点,提出一种基于改进非奇异终端滑模的无位置传感器控制方法。详细阐述了非奇异快速终端滑模面的缺点,分析了改进非奇异终端滑模面参数的意义,理论证明系统状态从到达滑模面至收敛到平衡点的作用时间是有限的。研究结果表明,相比于非奇异终端滑模,改进非奇异终端滑模控制方法能够有效提高观测系统收敛速度,减小抖振。

Aiming at the shortcomings of non-singular terminal sliding mode control method,such as slow convergence speed,a position sensorless control method based on improved non-singular terminal sliding mode is proposed.The shortcomings of non-singular fast terminal sliding surface are described in detail.The significance of improved non-singular terminal sliding surface parameters is analyzed.The theory proves that system state has a limited action time from reaching sliding surface to converging to equilibrium point.Research results show that compared with non-singular terminal sliding mode,improved non-singular terminal sliding mode control method can effectively improve observing system convergence speed,reduce chattering.