一种染色机温度控制器的设计

Design of Temperature Controller for Dyeing Machine

以染色过程的温度跟踪控制系统为背景,针对温度对象动态范围宽,其动态特性随温度变化且存在结构变化,常规PID控制不能适应的特点,设计了一种参数可变的PID控制器。在详细分析染色过程温度对象动态特性的基础上,根据染色过程的实际温度和温度偏差,应用模糊推理实时改变控制器增益,并引入了积分分离算法,有效地克服了积分饱和问题。实际运行结果表明,该控制器能适应染色过程动态特性的变化,保证了温度控制的精度,可有效地提高染色质量。

A variable parameter PID controller is designed for temperature control of dyeing process that has wide dynamic range and its dynamic characteristic varies with actual temperature, where the classical PID control can not obtain desired effect. Based on the detail analyses of the dynamic characteristic of temperature plant of dyeing process, fuzzy inference is used to change controller gain according to actual temperature and its error with desired value. Integral separate method is introduced to prevent integral saturation, The practical running result shows that the controller can adapt the varying dynamic characteristic of dyeing process, and the decision of temperature control and the dyeing quality effectively are improved.