气垫式流浆箱控制方案仿真研究

Simulation Research of Air-Cushioned Headbox Control Schemes

针对造纸过程中气垫式流浆箱的控制问题,提出了模型预测控制(MPC)方案。首先描述了气垫式流浆箱控制系统模型,然后分析PID和MPC控制原理和具体实施方案,最后基于MATLAB平台,利用图形用户界面(GUI)设计技术,开发出了气垫式流浆箱控制系统计算机仿真软件。通过该仿真软件,分别对气垫式流浆箱中PID和MPC控制方案进行仿真比较。结果表明,对于气垫式流浆箱这类双输入双输出的控制系统,MPC具有更好的解耦性、稳定性和鲁棒性,其控制效果比较理想。

Aiming at the control problem of air-cushioned headbox in papermaking process, model predictive control （MPC） scheme was proposed. The control system model of air-cushioned headbox was presented first. The control principles and particular schemes of PID and MPC were analyzed. At last, computer simulations of air-cushioned headbox control system were exploited by MATLAB and design technology of graph user interface （GUI）. Through the simulation software, different effects of PID control and MPC are compared. The results show that the MPC has better features of decoupling, stability and robustness in dual-input and dual-output control systems, such as aircushioned headbox control system.