基于改进型内模控制技术在钢厂温控系统中的应用

The Application of Temperature Controlling System in Steel Works Based on Improvement of Internal Model Control Technology

在钢铁厂炉温过程控制系统中,温度控制一般延迟时间比较久,并且属于不稳定对象,并带有大惯性。如果采用传统的PID控制,由于被控对象不稳定,而且带有大滞后,一般实现不了预定效果。本论文以温度为被控对象,采用Smith与IMC控制相结合,内环采用Smith补偿使消去大滞后时间,并串一增益Kc,由劳斯判据,把被控对象转化为稳定的对象,外环采用内模控制技术,综合鲁棒性与快速性,稳定性,通过调整滤波器的参数,得出仿真结果。

In a steel smelting process control system,the temperature control generally delays long time,belongs to the unstable objects with large inertia.If the traditional PID control is adopted,because the controlled object is unstable,with time delay,generally a predetermined effect can＇t be achieved.This paper adopts Smith and IMC control loop combination,Smith compensation makes expunction big time lag,and string a gain Kc.By Royce criterion,changes accused object into a stable object,the outer loop uses internal model control technology,combines robustness and quickness,stability and adjusts the parameter to get the filter simulation results.