Quantized Controller Design And Simulation Research Of Networked Control System

Networked Control System (NCS) is the derived from the combination of communication technology and control theory. NCS is cheaper, more flexible, more scalable, and more convenient to establish and maintain compared with the traditional network, which made more and more widely used in complicated industry control field. However, transmission delay, package missing and quantization would results in more significant effects than traditional network due to its deficiencies, such as narrow bandwidth, power limitation, path uncertainty. Considering the uncertainties in NCS, a math Model for NCS is presented in this paper, which is of great interest in exploring and analyzing NCS.The main results obtained in this dissertation are summarized as follows:(1) Aiming at networked control systems(NCS) with network-induced delay, data packet loss and quantify the basic issues networked control problems, the discrete network control system model is established; we research on the designing of states quantized feedback controller and quantized feedback H∞controller, focusing on the above problem. In this general model, logarithmic quantizer have been used for the quantizing signals, besides, the sufficient condition for the asymptotically stable of the networked control systems and the design of quantized feedback controller is proposed according to the Lyapunov stability theory and linear matrix inequality. The quantized feedback controller can make the systems asymptotically stable and meet the H∞performance. While the simulation result shows the effectiveness of the algorithm.(2) Aiming at discrete networked control systems(NCS) with network-induced delay, data packet loss such non-ideal network effects, time-varying quantizer have been used for the quantizing signals, we research on the designing of the status quantized feedback controller,quantized feedback H∞controller and quantized output feedback controller, focusing on the above problem, moreover, compare with the systems using logarithmic quantizer. The sufficient condition for the asymptotically stable of the networked control systems and the design of quantized feedback controller is proposed according to the Lyapunov stability theory and linear matrix inequality. While the simulation result shows the effectiveness of the algorithm.(3) Aiming at continuous networked control systems with network-induced delay, data packet loss such non-ideal network effects, logarithmic quantizer have been used for the quantizing signals, we research on the designing of the states quantized feedback controller with the system of states observation, Besides, the sufficient condition for the asymptotically stability of the networked control systems and the design of quantized feedback controller is proposed according to the Lyapunov stability theory and linear matrix inequality. While the simulation result shows the effectiveness of the algorithm.