模糊-积分并联变结构控制及其在水轮机调速系统中的应用

在对水轮发电机组调速系统模糊控制方案进行分析归纳后,发现一般模糊控制方法存在着隶属度赋值主观、模糊控制规则归纳困难、模糊推理合成及模糊推理判决运算量大而且丢失大量信息等问题。为此提出了一种建立模糊决策表的新方法———直接测辨法,并设计出一种新型控制方案:模糊 积分并联变结构复合控制,且通过仿真结果说明这种结构在克服积分饱和、缩短调节时间、消除静态误差、改善动态品质等方面是非常有效的。

Control of Fuzzy-integral Parallel Changed Structure and Its Application in the Speed Governor System of Hydraulic Turbine Generator

This article analyzes and induces the Fuzzy control schemes of speed governor system of hydraulic turbine generator. It is found that the common Fuzzy control methods have some defecfs which include the subjectivity of given value of subordinate degree, the difficulty of inducing the rules of Fuzzy control, a flock of Fuzzy inference compound and decision, and the liability of losing much information. So, a new method of establishing Fuzzy decision table is provided,that is,direct measure discrimination way. At the same time, a new control scheme is designed. This Fuzzy-integral parallel changed structure is very effective for overcoming integral satiation, reducing adjustment time, eliminating static error, and improving dynamic quality by means of complex control and simulation results.