基于变论域的铝电解模糊控制研究

Fuzzy Control Based on Variable Universe for Aluminum Electrolyzing Control System

针对铝电解控制中的不确定性、非线性等因素给系统带来的影响,基于常规模糊控制,分析研究了该系统基于变论域的模糊控制机理。选定电解槽中的电解质温度为论域伸缩因子,利用变论域的思想,通过论域的膨胀或压缩使模糊控制规则可派生出任意多条,实时提高在线控制精度。分析仿真结果可知,该算法使铝电解温度控制具有比用常规控制更高的温度控制精度和系统性能,验证了该设计的有效性和实用价值。

Aimed at the influence of uncertainty and nonlinear in aluminum electrolyzing control system,the variable universe fuzzy PID control is analyzed based on general fuzzy control.A renovated algorithm is proposed using bath temperature as constriction factor;the algorithm makes fuzzy control derive any rules by contracting and expanding the universe which increases the precision on-line,The simulation results is analyzed which indicated the algorithm expressing superior temperature control precision and system performance than the general fuzzy control.