精馏塔广义预测控制器设计

GPC Controller Design of Distillation Tower

该文针对化工蒸馏过程中系统模型参数实变,而按某一固定模型设计的PID控制器,不能很好地适应系统参数实时改变,控制效果不能很好地满足控制要求;为了更好地适应系统参数实变带来的模型不确定性,采用广义预测控制,此种控制能利用系统过去的状态信息和将来的预测输出,实际控制效果比单纯的PID控制要好。同时为了控制器能更好地适应各种信号形式,硬件采用万能输入,同时算法具体实现过程中采用GPC-PID串级控制。

Aimed at parameter time-varying in distillation process of chemistry industry,the PID controller which parameters is set according to a fixed model,isn＇t very good in performance and stability requirements. In order to adapt to model uncertainties for system time-varying parameters,GPC is employed,and not only passed states but also predictive output is applied to design controller,so the performance is better than PID. In order to adjust to all kinds of inputs,universal input is employed in hardware,and algorithm is realized in the form of GPC-PID.