The Research On Real-time Simulation Of Control System Of The Industrial Ethernet

Network control system (abbreviates as NCS), namely networked control system, it is the development and merging result of computer technology, communication technology and controlled technology. It can apply to nearly any occasions of distribution equipment with controller needing to carry on data interchange. DCS, Industrial Network and Fieldbus control system are all network control systems. NCS reflect the development trending of control system to networked integrated distributed and node intelligent, compared with traditional control system have unparalleled superiority . Network control system becomes the hot-point of the study of the control system.In the paper the networked control system communicationg with WinSock portocol has been analyzed and studied, and the real-time online half a material simulink has been carried on. At first, the artical introduce the media access mechanism of control networked and analysed the time of networked control.Secondly, the network time-delay has been tested and analysed, and the method to calculating and predicting the time-delay has benn given.The study is focus on the networked control system whose network time-delay are less than on sample period. The NCS model is obtained by considering nerwork time-delay. And the conclusions have been proved by simulation. Then, the simulation program of networked control systems communicating with Winsock protocol by use VC has been maded, which can work under breaking away from MATLAB/Simulink running environment. Finally, the article gives the scheme to realize real-time control the coupled-tanks under the environment of network.