Fundamental problems of networked control system from the view of control and scheduling

NCS (networked control system) is a kind of feedback control systems wherein the control loops are closed through real-time control network. The existence of real-time network in the feedback control loop makes the analysis and design of an NCS complex. Conventional control theories must be reevaluated before they can be applied to NCS. Numerous research papers have investigated analysis and design of NCS from different angles. This paper aims to introduce state of arts of NCS and point out the field of further researches.