The Development Of Simulation Platform For Networked Control System Based On Matlab

With the development of electronic technology, computer and networked communication technology, control system is speeding up from close and centralized architecture to being open and distributed, to satisfy the continuous developing requirement of control quality and management. Networked control system is gradually formed in the process, and soon become one of the most important domains of control technique. However, some problems always exist including time-delay, data transferring and data packet loss in networked control system, and they will make the designed controller and control system unstable, or even fail to work. So we should do research about networked control system controller designing methods. Scholars need platform to do the research, but a large number of human resource and funds are needed to establish a real experiment platform .and develop software system for the platform, so establishing a simulation platform becomes a proper way.The paper study the development of simulation platforms based on Matlab, Matlab does not have network communication modules to make the network be part of the simulation platform. The paper designed a solution using OPC data server cooperated with Matlab to develop a simulation platform. Matlab works as an OPC client communication with OPC server though the net with the help of OPC Toolbox via OPC technology, and the problem that Matlab could not simulate online is solved.The platform designed has better accuracy than that uses software simulation like TrueTime, It also could satisfy the stability and real-time requirement which the simulation models ask for, utilizing the mature OPC data access mechanism. OPC is based on COM and DCOM, which use RPC working on Session Layer to deal with all networked interaction. It's more universal than Socket programming which rely on Transport Layer Protocols.Experiments show that the platform could reflect the affection of real network, it runs fluently and could works as the simulation platform for networked control system...