动态矩阵控制器在重介选煤工艺中的控制应用

Control Application of DMC in Heavy Medium Selecting Coal Process

重介选煤法中,重介液密度及合介桶液位存在相互耦合作用,使PID控制效果并不理想。清水阀、分流阀及加介阀开度为影响重介液密度与合介桶液位的因素。建立3个因素单独对重介液密度及合介桶液位的响应模型,采用规划约束算法对动态矩阵控制器参数进行优化,将清水阀、分流阀及加介阀开度作为控制器的输入量,对重介液密度及合介桶液位实施联动控制。通过仿真分析,该控制算法,可以大幅削减重介液密度及合介桶液位达到稳定值的时间。

In heavy medium coal prepa ration process,because of the mutual medium suspension density control and liquid level of qualified medium barrel is not ideal. The opening of water valve, diverter valve and qualified medium v coupling between heavy control,the effect of PID alve are the three factors that affect the density of heavy medium suspension and the liquid level of qualified medium barrel. First set up three factors＇ step response model to the heavy medium suspension and the liquid level of qualified medium barrel respectively. Then using the algorithm of planning constraints to optimize the parameters of dynamic matrix controller. Finally, making the opening of water valve, diverter valve and qualified medium valve as three input variables of the controller. Realizing the joint control of heavy medium suspension and liquid level of qualified medium barrel. Through the simulation analysis, this control algorithm can significantly reduce the achieving stable time of heavy medium suspension and the liquid level of qualified medium barrel.