基于LONWORKS现场总线的自整定PID控制系统

PID Autotuning System Based on LONWORKS Fieldbus

将PID自整定技术和现场总线技术有机地结合起来 ,实现了基于LONWORKS现场总线的PID自整定系统。自整定系统由两层组成 ,上层为PC计算机 ,下层为一个智能节点。它们之间通过LONWORKS现场总线进行通信。PC计算机给操作人员提供一个良好的人机界面 ,同时控制着整个PID参数自整定的过程。实验证明了该自整定系统的适用性和有效性 ,必将在工业过程控制中得到广泛的应用。

In this paper,PID autotuning technique is combined with feildbus technique,thus an autotuning system based on LONWORKS fiedbdus is implemented.The autotuning system includes two levels,the upper level is a PC with Windows,the lower level is an intelligent node.The two levels communicate via LONWORKS fiedbus network.The upper computer not only provides good user interface,but also control the whole procedure of PID tuning.Experiments show the effectiveness and flexibility of the PID autotuning system which can be popular in the process industry.