Design of Networked Control Systems with Two Different Working Status

ABSTRACT

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

Keywords:

Necessary and sufficient conditions, Network-Induced Delay, Nonlinear Switched Systems, Packet Dropouts, Restarting, Controller.