Research On The Network Measurement And Control System Based On ADS Technology

With the development of computer technology and the scale-up of application field for measurement and control system,the network requirement of measurement and control system is becoming higher. Traditional measurement and control systems come to expose their inherent limitations:for large-scale network systems,in centralized systems,the burden is too concentrated on the main computer to broaden the system and change it dynamically;and in the client/server mode,the extension problem is settled in some degree,but the problem of large amounts of system burthen swarms into srevers still exists.Besides,many technologies of traditional measurement and control systems are faced with new challenges including network communication technologies, online-expansion, online-maintenance and fault-tolerance technologies and system designing methodology and so on.In allusion to the new requirements of network measurement and control systems,a new model of network measurement and control system— the network measurement and control system based on ADS technology is proposed. The new structure model is equity structure, namely, the nodes of system are connected only through Data Filed, which are equal in system. And the communication mechanism is a Publish/Subscribe one, which is performed using UDP-base multicast technology.The system designing method is from bottom to top---from subsystem to the whole system gradually.The system solves the difficult problems of traditional network measurement and control systems in a certain extent, realizes the online-expansion, online-maintenance and fault-tolerance technologies and presents the properties of autonomous controllability and autonomous coordinability of the new system.The thesis firstly analyzes the development status of traditional network measurement and control systems and points out the shortages in system architecture, communication model and system designing methodology. Combining with the development trend of measurement and control system,it puts forward the solution project which is based on ADS technology. Introducing the designing idea and structure character of ADS technology in the network...