Analysis And Design Of Networked Control System Based On Switched Approach

Given the network topology and network load, this dissertation studies the stability and sta-bilization of the networked control systems (NCSs) with the problem of multiple-transmission or limited bandwidth and so on. The main results and contribution of this dissertation are as follows:First, we propose a switched system to the stabilization of a collection of NCSs with node devices acting over a limited communication channel, we assume that the state information of every subsystem is split into different packets and there is only one packet of the subsystem can be transmitted at a time. Multiple NCSs with periodic transmission are modeled as a periodic switched system in this section. By using the well-known elimination lemma, we get sufficient conditions on the stabilization of the NCSs. State feedback controllers can be constructed in terms of linear matrix inequalities (LMIs).Second, robust stabilization of a collection of NCSs with limited bandwidth is considered in this section. We suppose that the state information of every subsystem is split into different packets. We are particularly interested in the case that only one packet containing part of the state information can be transmitted at a time. Multiple NCSs with norm-bounded parameter uncertainties are modeled as a periodic switched system in this paper. State feedback controllers can be constructed in terms linear matrix inequalities. A numerical example is given to show that a collection of systems with the problem of limited communication can be stabilized via the designed controller.Then, we propose a jump system approach to the robust stabilization of linear uncertain discrete-time NCS via limited capacity communication channels. We assume that the state information of the system be spilt into different packets and only one packet can be transmitted at a time. Meanwhile, suppose that the packet transmission process governed by a Markov chain. Sufficient conditions on robust stabilization of the NCSs are obtained and the explicient express of the controller can be constructed directly.