基于网络控制的球杆系统模糊控制器设计  

Fuzzy Controller Design of Ball-Beam System Based on Networked Control

作　　者：占探[1] 桂卫华[1] 阳春华[1] 伍晓峰[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《控制工程》2011年第1期78-82,共5页Control Engineering of China

基　　金：国家自然科学基金资助重点项目(60634020);教育部博士点基金资助项目(200805331103)

摘　　要：针对网络化控制系统中存在的网络延时的不确定性,提出了如何根据系统的控制性能要求处理网络传输过程中网络延时的时变特性。通过对网络环境的分析,把网络延时进行分段序列化,使时变的网络延时转换成一个固定延时序列。在球杆系统本地化控制中加入固定延时,获取不同延时情况下球杆系统的最佳控制参数。在网络控制中,通过捕获的网络延时查找最佳控制参数库,对模糊控制器的量化参数进行动态调整,减少网络时延对系统动态性能的影响。仿真结果表明,采用这种方法一定程度上能改善球杆系统在网络化控制环境下的动态响应性能和稳定性。通过对时钟同步协议的分析,提出的对Internet网络环境下的延时处理方式,在网络化控制系统的设计上具有一定的参考价值。To the uncertainty of network delay in network control systems,the time-varying characteristics of network delay in the process of network transmission is discussed to the system control performance.Subsection serialization is maken on the network delay through the analysis of network environment,so that the time-varying network delay can be turned to a fixed-delay sequence.Then it adds fixed-delay sequence into the local control of ball and beam system in order to obtain the best control parameters of ball-beam system under different delay conditions.In network control,it finds the best control parameter library through the captured network transmission delay and makes dynamic adjustments towards the quantitative parameters of fuzzy controller in order to reduce the impact on the dynamic performance of the system caused by network delay.The simulation results indicate that this method can improve the dynamic response performance and stability of the ball-beam system in the network control environment.A certain reference value in the design of network control system as it proposes a delay processing mode under Internet network environment through the analysis of the clock synchronization protocol.

关 键 词：网络化控制系统 网络延时 球杆系统 模糊控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]