DMC-PID控制在分级磨矿系统中的应用

APPLICATION OF DMC-PID CONTROL TO GRINDING CLASSIFICATION SYSTEM

本文针对某锡石-多金属硫化矿两段磨矿回路,采用动态矩阵与比例积分微分调节(DMC-PID)串级控制。针对磨矿系统时间滞后长、耦合性强的特点,设计并推导了三输入四输出的DMC-PID串级控制磨矿控制系统模型,首先在磨矿过程中干扰最多的部位取出信号构成PID闭环控制,快速有效地抑制突发性干扰,再采用DMC算法,对通过PID调节后的广义磨矿系统进行滚动优化和反馈校正,建立多段磨矿回路的自动控制模型。

Based on the two-stages grinding circuit in a cassiterite polymetallic sulfide ore,Dynamic Matrix and Proportion Integral Differential（DMC-PID） cascade control are introduced in this paper.In view of time lag long and strong coupling of grinding system,a DMC-PID cascade control model for grinding control system with three input and four output is designed and deduced.First of all,remove the signal from the largest part of interference and make up a PID closed-loop control in the process of grinding to restrain the sudden disturbance rapidly and effectively.And then adopt DMC algorithm to perform rolling optimization and feedback correction for the generalized grinding system after the adoption of PID regulator.Finally the automatic control model for the multi-stage grinding circuit is set up.