多温区电加热炉温度控制算法的研究与应用  

Research and Application of Control Algorithms in Electrical Furnace Multiple Temperature Zone

作　　者：韦晓慧[1] 梁昔明[1] 鲁五一[1] 肖珊[1] 

机构地区：[1]中南大学铁道校区,湖南长沙410075

出　　处：《机械制造与自动化》2007年第1期102-104,共3页Machine Building & Automation

摘　　要：针对多温区电加热炉大时滞、时变性强、强耦合和对象模型难以确定等特点,提出一种基于继电辨识模型的PID自整定算法,该法将Smith预估算法、继电辨识和模糊控制相结合,用继电反馈法在线辨识出Smith预估所需要的对象模型,并整定出控制器PID的初始值,在此基础上,对系统进行Smith预估补偿的同时利用模糊控制在线修正PID参数。经实验证明将该算法运用于多温区电加热炉的温度控制中是合适的,可获得很好的控制精度和鲁棒性。Aiming at the characteristics of EFMTZ （electrical furnace multiple temperature zone）, such as large delay, time variety, strong coupling, a kind of method based on relay identification model is presented in this paper. This method combines Smith predictor, relay identification with fuzzy-control, using relay feed back method to obtain the model for Smith predictor and Smith predictor turn the initial values of PID controller on line. On this basis, Smith predictor is compensated fee the system, at the same time fuzzy-control is used to revise, PID-parameters on line. The control result shows that this method used in EFMTZ is appropriate and can achieve good control performance and robustness.

关 键 词：多温区电加热炉 继电辨识 Smith预估 模糊PID 

分 类 号：TM924.13[电气工程—电力电子与电力传动] TP13[自动化与计算机技术—控制理论与控制工程]