Research And Modeling Of Networked Control System

NCS with network-induced time-delay, packet-dropout are researched in this dissertation. A new method is used for modeling of NCS with network- induced short time-delay. Several different methods of scheduling of network are discussed and the impacts of different network are compared.The NCS with time-driven sensors, event-driven or time-driven controllers and actuators are studied separately and the models of short time-delays and long time-delays are given; the first-order-holder discrete model is given and compared with the zero-order-holder, an illustrative example is given to demonstrate that the first-order-holder discrete model output is more desirable.The NCS with packet-dropout can be modeled as a switched system. In the end, the true-time toolbox is studied and the two methods of scheduling are compared.