大时滞工业过程的双控制器结构
A Double-Controller Scheme for Industrial Processes with Dominant Delay
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摘要: 提出一种简单实用的双控制器方案,用于大时滞工业过程控制.该方案含两个独立 的控制器,即跟踪控制器和扰动控制器,使设定值响应得以与扰动响应分离,从而可同时获得 良好的设定值跟踪性能和抗干扰能力.双控制器系统含过程模型,但对过程模型不敏感,因而 鲁棒性好.文中将两个控制器设计为比例加积分(PI)类型,给出了具体的参数整定方法.Abstract: A simple and practical double-controller scheme is proposed for industrial processes with dominant delay. It contains two separate controllers, a set-point controller and a load controller. The set-point response of the closed-loop system is then decoupled from the load response. As a result, the two controllers can be separately designed to obtain good performance in both set-point tracking and load rejections. The double-controller scheme is model based. It is, however, insensitive to the process model ,resulting in good system robustness. The two controllers are taken to be proportional-integral(PI)type for simplicity. Tuning procedures of the two controllers are also presented.
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Key words:
- Time delay /
- process control /
- double-controller /
- Smith predictor
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