非线性四容水箱预测控制研究

摘要

To overcome the difficulty of implementing predictive control in the industrial field,the strategy of integrating Matlab and PLC / HMI industrial control system by using OPC communication technology,and predictive control scheme was proposed.A mechanical model was established for quadruple tank system and through the online i-dentification to obtain unknown parameters of the quadruple tank model,and control the level of quadruple tank. The actual control results show that predictive control can make a good following the tracks of set value,and proved the feasibility and validity of this control strategy.%根据工业现场实际控制中实现预测控制的困难,提出了利用OPC通讯技术把Matlab与PLC/HMI工业控制系统进行集成,并实现预测控制的方案.文中还针对非线性四容水箱系统建立了机理模型,并通过在线辨识获得四容水箱模型的未知参数,从而对水箱液位进行控制.实际控制结果表明,预测控制能够很好地使水箱液位跟踪设定值,验证了该控制策略的可行性及有效性.