时滞离散系统的模糊—最优跟踪控制

Fuzzy—optimal Output Tracking Control for Discrete—time Delay System

工业过程中,时滞和系统的离散特性常会带来显著的影响,使系统的性能指标下降,产生不稳定;文章介绍了时滞离散系统的模糊—最优跟踪控制,该方法运用最优跟踪控制的极小值原理寻求最优控制律,结合模糊控制对运动控制反应快的优点,使该方法能够较好地计算出系统实际输出相对期望输出的偏差,并通过反馈回路校正实现无静差跟踪控制;在不同时滞条件下做大量的仿真计算,使火电厂主蒸汽温度有效的快速跟踪设定值;实验分析验证了该方法的有效性,表明模糊—最优跟踪控制器能够切换平滑,跟踪控制误差小,抗外干扰能力强。

In industrial processes, the delay and the discrete nature of the system will often bring a significant impact, make the perform- ance indicators and instability of system decline. This article describes the Fuzzy--optimal output tracking control for discrete--time delay system, the method using the minimum principle of the optimal tracking control for searching optimal control law, and combined with fast re- sponse to motion control of fuzzy control, which make this method can calculate the deviation between the system actual output and desired output, and correction through a feedback loop to achieve floating chase control. Do a large number of simulation under different conditions with delay, the main steam temperature of thermal power plant can fast--track settings effectively, the experimental analysis to verify the effectiveness of the method, shows that fuzzy -- optimal tracking controller can switch smooth with a small tracking control error and strong resistance to external interference.