Design of Networked Control Systems with Two Different Working Status

This paper is concerned with stability and controller design of networked control systems (NCSs) with two dif- ferent working status. Firstly, the working status of NCSs are considered as two different cases: the normal case and the un-normal case. In normal case, the work process of NCSs are described by two independent working process: one is the packet dropouts process; the other is the network induced delay process. In un-normal case, there are two goals should be achieved for designing: one is to simulate the initial system for restarting the normal case; the other is to ensure the stabil- ity of NCSs as much as possible. Secondly, according to the designed networked controller, a novel necessary and suffi- cient condition for guaranteeing the stability of the NCSs under the un-normal case is proposed. Furthermore, the dynamic behavior of the NCSs where switching between the normal case and the un-normal case is considered. Finally, a numeri- cal example illustrates the effectiveness of the results.