基于模糊PID自适应算法的重介质洗选煤控制系统研究

Research on the dense medium coal cleaning control system based on the fuzzy PID adaptive algorithm

在重介分选过程中,重介质悬浮液的密度控制效果直接决定重介分选的产品质量。本文针对重介质洗选煤过程中使用介质悬浮液密度和介质桶液位变化存在的时变、非线性等特征,采用模糊PID自适应算法,建立了重介质洗选煤过程控制模型。该模型由模态识别器和模糊PID自适应控制器组成,协同对主选分流执行阀、加介分流执行阀和清水阀进行调节,以实现对介质悬浮液密度和介质桶液位的控制,并进行工业运行试验。结果表明:采用模糊PID自适应算法的重介质洗选煤控制系统,对介质悬浮液密度和介质桶液位控制相对于常规PID控制调节,具有精度较高、响应速度快等优点,满足洗选煤过程控制要求。

In dense medium separation process,the density control effect of heavy medium suspension directly decided to dense medium separation of product quality.This paper aim at dense medium coal cleaning process use medium suspension density and medium barrels of liquid level changes of time-varying,nonlinear and so on characteristics,using an adaptive fuzzy PID algorithm,dense medium coal cleaning process control model is established.The model consists of the modal recognizer and fuzzy PID adaptive controller,synergy to select executed valve,dielectric shunt valve and water regulating valve,in order to realize the control of the medium level slurry density and medium bucket,and the industrial operation test.Results show that using an adaptive fuzzy PID algorithm of dense medium coal cleaning control system,the suspension of medium density and dielectric barrel level control precision,and fast response speed,satisfies the requirement of coal cleaning process control.