引言温度控制系统是工业控制中比较典型的控制系统,它是一个一阶纯滞后惯性系统,具有明显的滞后特性,对于需要快速准确的获取和控制实时温度的场合(如制药、化工、石油、食品加工等),采用一般的控制方法很难获得满意的控制效果。采用可编程序控制器及其网络对它们进行控制,不仅 INTRODUCTION Temperature control system is a typical control system in industrial control. It is a first-order pure hysteresis inertial system with obvious hysteresis characteristics. For applications requiring rapid and accurate acquisition and control of real-time temperature such as pharmaceutical, chemical, petroleum, Food processing, etc.), using the general control method is difficult to obtain satisfactory control effect. Using programmable logic controllers and their networks to control them, not only