Quasi T-S Fuzzy Models and Stable Controllers for Networked Control Systems

Networked control systems (NCS) are systems with at least one loop closed through data networks. NCS have many peculiarities, such as network-induced time delay, data packet dropouts, asynchronous clock among network nodes etc. It is necessary to develop new theory and technology for control system over networks. Many researchers are interested in NCS recently. In this paper, we emphasized on the NCS with random time delays. We presented a new modeling method for linear and nonlinear NCS with random time delays, and named these models as quasi T-S fuzzy models. Based on these new descriptions for NCS, two theorems for the stability of closed-loop NCS and stable controller design were presented. All the discussions and results in this paper are not only applicable to NCS but also applicable to normal nonlinear system with multiple time delays