Analysis And Compensation Of Networks Control System With Data Packet Losses

The application of networked control system is more and more widespread along with the rapid development of internet. The networked control system constitutes closed loop feedback control system through the real-time network, the networked control system has the virtues that shareable information, few segment, easy to expand and maintain, higher reliability and flexibility compared with traditional point-to-point like control system, but after the signal transmitting between the industrial process and controller, time delay, packet-loss and multi-package transmission may cause the performance of the network decline, even making the system is unstable, this is inevitable problem existed in data transmission.The main research work of this thesis is the strategy research of the networked control system with packet-lost. First, a survey of the networked control system development and the problem existed in the networked control system after joined into the network are introduced, secondly, the packet-lost of the network transmission is analyzed, and the discrete mathematic model of the generalized accusation object with network is established, then, in view of the question that packet-lost through the transmission from the sensor and the control, the compensation strategy based on Kalman Filter is obtained, finally, the validity of the network control by simulation.In the end of this thesis, the prospect of the network control theory has been forecasted, and the direction of future work has been prospected, too.