以太网在锌电解供电优化控制系统中的研究与应用

【作者】 刘艺华；

【导师】 申群太；

【作者基本信息】 中南大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 本文以锌电解供电优化控制系统的设计为背景，以锌电解供电控制以太网的设计为目的，提出了以太网的结构设计方案，对以太网应用于锌电解现场的关键技术作了研究，并设计了现场控制器的以太网接口。围绕这个课题，重点研究了以下几个方面的问题：文章首先分析了优化控制系统的原理及结构，包含四部分：电解供电优化调度、整流供电优化决策系统、全数字闭环控制系统和集中监视与远程监控系统。按照工业以太网的设计原则，设计了基于分层的结构化锌电解供电控制以太网，为锌电解供电控制系统提供了一个全分布的、对等的通信平台。同时，针对工业控制对可靠性的要求，对网络结构采用了冗余设计技术。其次，针对工业以太网应用于锌电解供电控制现场存在的一些关键技术进行了研究。主要在分析了以太网通信“不确定性”的基础上，讨论了改善以太网通信实时性的措施：全双工交换通信模式、虚拟局域网技术、网络实时调度技术；并对工业以太网应用的互可操作性进行了研究；最后对网络安全性作了分析，主要采用二级防火墙技术来解决网络安全性。最后，对锌电解供电现场控制器以太网接口设计进行了讨论。以太网接口采用基于ARM7TDMI内核的S3C44B0X作为微控制器，而选用全双工的RTL8019AS作为以太网控制器，具有双口互为备份的特点。在采用μClinux嵌入式操作系统的基础上，开发了通信的驱动程序，并采用socket套接字技术设计了以太网通信应用程序。更多还原

【Abstract】 Based on the optimized control system for power_supply of zincelectrolyte, to design the industrial Ethernet of zinc electrolyte, the paperhas put out the plan of the Ethernet structure. It also researches theimportant technique and design of the Ethernet interface. About this topic,the paper has done the important research about the problems below.Firstly, the thesis analyzes the elements and structure of theoptimizing and control system, the system contains four parts: optimalscheduling of electrolyzing power system, rectified power optimaldecision-making system, total digital close-loop control system andCentralized Monitoring and long-distance Control System. Structural zincelectrolysis power supply control Ethernet based on delamination isdesigned according to the designing principle of industrial Ethernet. Fullydistributing and peer to peer communicational platform is provided forzinc electrolysis power supply control system. At the same time,redundance technique is adopted aiming at the request of the reliability ofindustrial control.Secondly, research aims at the key techniques of the optimizedcontrol system for power supply of zinc electrolyte. The topic isdiscussed to improve the real-time of Ethernet, on the base of analyzingthe uncertainty of Ethernet: the full-duplex Exchange-communicationmode, VLAN, the message scheduling technique of network; and themaneuverability of industrial Ethernet is studied. At last, the security ofthe net is analyzed, second fireproofing technique is used to solve thenet-security.Lastly, the Ethernet interface for the controller of power supply ofzinc electrolyte is discussed.S3C44B0X,based on the ARM7TDMI core,isused as the Micro-controller, and RTL8019AS based on full-duplex,as theEthernet controller.The Ethernet interface has two channels,being a copyfor each other.As software design, on the platform of the embeddedreal-time Operation SystemμClinux, the communication driver isdesigned. Furthermore, the communication application program isdesigned using socket technique.更多还原