Modelling and dynamic output feedback controller design for networked control systems

This paper is concerned with modelling and dynamic output feedback (DOF) controller design for networked control systems (NCSs) with packet dropouts, network-induced delays and data drift. First, the polytopic-uncertainty-based data drift is introduced to formulate some new models for closed-loop NCSs, where packet-dropouts and network-induced delays from both the sensor-to-controller channel and the control-to-actuator channel are taken into account. Second, based on the new models, several sufficient conditions are derived such that the closed-loop NCSs is mean exponentially stable with a prescribed H
_∞
performance. Third, an iterative algorithm is proposed to solve out the desired DOF controllers. A numerical example is finally taken to show the effectiveness of the method proposed in this paper.