Controller Design And Simulation Of Wireless Networked Control Systems

With the fast development of the wireless technology, wireless networks are widely used in recent years. The applicability of wireless networks in control systems is attractive. Wireless Networked Control System (WiNCS) is a distributed control system based on the wireless network. It is a combination of control, computer, network, and communication technology. The WiNCS has many advantages such as no wire, lower cost, easy to maintain and expand, higher flexibility, and so on. Since the bandwidth limitation of wireless networks, some new issues such as stochastic delay, packet dropping, interference and bandwidth competition appear. Therefore, the analysis and design of WiNCS has become a hotspot in the control field.The design and simulation of the controller in WiNCS are studied in this thesis, considering the impact of network-induced delay and interference.First, the development of networked control system is reviewed, and some basic contents, issues, recent research results on WiNCS are summarized.Second, a design method of an adaptive Fuzzy-PID controller based on network-induced delay and disturbance observer is proposed. The performance of different control strategies are discussed through numerical experiments.Third, the simulation technology of WiNCS is studied. A simulation model of WiNCS is designed on the basis of TrueTime and MATLAB/Simulink, and some experiments are performed based on the system model and control strategies. A design methodology of an adaptive Fuzzy-PD controller based on bandwidth occupied rate is proposed.