针对重介质选煤过程存在的时变、非线性和强耦合等特征,采用模糊控制理论,建立了重介质选煤过程控制模型,该模型由模态识别器和3个模糊控制器组成,协同调节主选分流阀、加介阀和清水阀.侧重描述了模糊控制模型的结构原理、模态识别器和模糊控制的实现方法,并进行了工业运行试验.结果表明:对于介质悬浮液密度和介质桶的液位,采用模糊控制算法,其控制精度较高,响应速度较快,可满足生产工艺的控制要求.%According to the time variation, nonlinear and strong coupling and other features existed in the heavy medium coal preparation process, the fuzzy control theory was applied to establish a control model of the heavy medium coal preparation process. The model was consisted of a modal identifier and three fuzzy controllers and could coordinate with the shunt valve, medium feeding valve and clean water valve. The paper in detain described the structure principle of the fuzzy control model, and the realization method of the modal identifier and the fuzzy control. An industrial operation trial was conducted. The results showed that the fuzzy control algorithm was applied to the medium suspension density and the medium barrel level. The control accuracy could be high, the response speed could be relatively quick, thus the fuzzy control algorithm could meet the control requirements of the production technique.
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