一种改进的离散变结构控制算法

An Improved Algorithm of Discrete Variable Structure Control Systems

研究基于离散幂指数趋近律的变结构控制器设计问题,对利用传统离散指数趋近律设计变结构控制器时出现的稳态抖振现象进行分析,提出了一种新的滑模趋近律,该趋近律克服了指数趋近律固有的的缺点,能有效地减小系统的抖振,并保证系统渐近稳定。用该算法设计离散变结构控制器,并选取永磁直线同步电机作为仿真研究对象,仿真结果证明了该算法的有效性。

The design of variable structure controller based on the discrete power exponential rate reaching law is researched. The phenomenon of system chattering using conventional exponential rate reaching law is analyzed and a sliding reaching laws is proposed,which overcomes the shortcomings of the old one. The modified algorithm ensures the elimination of chattering and the system asymptotic stability. The sliding reaching law is applied to the controller design for permanent-magnet linear synchronous motor and the simulation results verify its effectiveness.