同步发电机混沌振荡的模糊滑模变结构控制

Fuzzy sliding mode variable structure control for chaos oscillation of synchronous generator

为消除周期性扰动下同步发电机中的混沌振荡,使系统输出跟踪给定信号,采用模糊滑模变结构控制方法,设计混沌控制器。采用指数趋近律方法,设计切换控制律,使系统能克服扰动影响,快速到达切换面;在滑动模态,采用模糊控制规则,抑制控制中的高频抖振。仿真结果显示:加入传统滑模变结构控制器后,大约需要12.5 s,系统跟踪上给定信号,在渐近跟踪过程中,控制中出现高频振荡;加入模糊滑模变结构控制器后,在1 s内,系统跟踪上给定信号,在渐近跟踪过程中,控制中无振荡现象。

To eliminate the chaotic oscillation of synchronous generator and make system output track the reference signal,a chaos controller is designed applying the fuzzy sliding mode variable structure control. The exponential trending law is used in the switching control to make the system get over the disturbance and rapidly arrive at the sliding surface. During the sliding mode phase,the sliding mode variable structure control based on fuzzy rule is used to suppress the high frequency chattering. Simulation results show that, after the traditional sliding mode variable structure controller is added,system asymptotically follows the reference in about 12.5 s,with high frequency chattering,while after the fuzzy sliding mode variable structure controller is added,system asymptotically follows the reference within 1 s without high frequency chattering.