基于无线传输顺控系统的超滤系统性能分析与仿真  

Analysis and Simulation of Performance of Ultrafiltration System Based on Sequence Control System Using Wireless Transmission

作　　者：王仁书[1] 白焰[1] 李秋灵[1] 朱耀春[1] 琚赟 

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206

出　　处：《系统仿真学报》2014年第1期23-28,34,共7页Journal of System Simulation

基　　金：北京市教育委员会共建项目;中央高校基本科研业务费专项资金资助(13MS24)

摘　　要：以电站化学水处理中超滤系统的顺序控制为背景,提出无线分布式顺序控制系统。系统的特点是取消传统控制系统中集中的控制器,同时将控制逻辑分散到现场的无线节点。系统的控制任务主要由现场控制级的无线节点完成,而且系统中的设备状态完全依靠无线网络进行传输。为分析无线传输中的误码和延时对系统性能的影响,建立了无线分布式顺序控制系统的Petri网模型,提出状态限定的方法提高系统正确运行的概率,并采用偏差补偿减小无线传输延时造成的状态持续时间偏差。最后给出仿真对比结果证明方法的有效性。Wireless distributed sequence control system was proposed based on the background of the sequence control for the ultrafiltration system in chemical water treatment in power plant. The most prominent features of this system are that there is no centralized controller and control logic is executed in distributed wireless nodes. The control task was mainly fulfilled by the wireless nodes belonging to the field control level and the states of the devices are transmitted through wireless network totally. So the model of wireless distributed sequence control system using Petri nets was constructed to analyze the delay and bit errors in wireless transmission. And the method of state restriction was proposed to enhance the correct operation and the deviation compensation was introduced to minimize the deviation of the duration of the states. At last, the comparisons of the simulation result show the effectiveness of the designed approaches.

关 键 词：无线网络 分布式系统 顺序控制 PETRI网 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]