获取炉温类受控对象特征参数的新方法

A New Method for Obtaining the Characteristic Parameters of Furnace Temperature Plant

针对炉温类被控对象提出了一种基于开环阶跃响应的获取对象特征参数的新方法,给出了程序流程图。与两点法、交叉两点法及特征面积法等方法不同,在应用计算机求解的过程中仅需保留邻近4个采样时刻的采样值,且无需阶跃响应达到稳态即可计算出对象的特征参数,具有数据存储量小、速度快、方法简单等特点。应用该方法获取某红外线加热炉温度系统的特征参数,并采用ITAE(Integral Time Absolute Error)设定公式整定PID控制器的参数,取得了较好的控制效果。

For furnace temperature plant, a new method based on open-loop step response for obtaining the characteristic parameters of controlled plant was brought forward and the program flow diagram was supplied. Being different from other methods like two-point, cross-two-point and feature-area, this method can get the characteristic parameters through four sampling values of neighbor points earlier before that step response reaches the state of stabilization, and has the advantage of small memory size, fast velocity, simple process and so on. As an example, the latent parameters of an infrared furnace＇s temperature control system are obtained by this method and the parameters of PID controller are calculated by ITAE optimal tuning formulae. It shows that the control result is good.