Networked Control Systems Based On Switching

With the development of automation and computer networks, networked control systems (NCS) emerge naturally. Innovation of information brings far-reaching effects and challenges to automation. In recent years there has been considerable interest in networked control systems. The modeling, stability analysis and controller design in networked control systems are studied in this dissertation.Firstly, the basic problems and the modeling of networked control systems are presented. The mathematic models of networked control systems with data packet dropouts and delays are established.Secondly, based on the switched model, we study the control methods of networked control systems with delays and data-packet dropouts. The switched model with an open-loop observer and a close-loop observer is established. The state feedback H_∞controller is designed to compensate the external disturbances. Numerical simulation results illustrate the effectiveness of the proposed method.Finally, we study a new kind of network-based model------Network-BasedFeedback Interconnection (NBFI). The NBFI with data packet dropout is modeled as an asynchronous dynamical system with rate constraints on events. By using the average dwell time method, a sufficient stability condition for NBFI is obtained.Numerical simulation results show the effectiveness of the proposed approach.