基于模型参考自适应PID的高压釜温度控制

摘要

通过对某厂生产复合玻璃关键步骤“合片抽真空”的研究,发现在此过程中应用的温度控制方法简单,控制效果不理想,会产生超调、震荡等现象;为了解决在温度控制过程中出现的这些现象,提出了一种基于模型参考自适应PID的高压釜温度控制方式;首先,通过实验对高压釜釜内温度进行温度建模;然后,以此温度模型为理论依据,通过模型参考自适应控制方式对PID参数进行在线调整,即利用了PID控制使用方便、原理简单的特点,又弥补PID参数不能在线整定的缺点;通过仿真实验证明,该控制方案能够有效减少超调量,改善动态特性.%Based on investigation of glass laminating and vacuumizing,it shows that the temperature control method which is in use is too simple to get a better result.This method causes overshoot,shock and so on.So design a more accurate method called temperature control of autoclave based on model reference adaptive system and PID control to deal with those problems above.Frist,it will model the temperature of autoclave with the experimental datas.And then set the parameters of PID control by the temperature models.Next the parameters can be adjusted on line based on the model reference adaptive system (MRAS).That makes up deficiency of classical PID control and use the advantages of PID.From the simulation,it shows that the method can reduce the overshoot and improve dynamical property.