Active variable-period sampling in networked control systems

The variable location of controller in Internet-based networked control systems would worsen system performance or arouse system unstable. To deal with such a problem, this paper proposes a design method of networked controller with active varying sampling period. The discrete mathematical model of networked control systems with variable sampling period was set up. Then the sufficient condition of stability for networked control systems with short time-delay was given using Lyapunov functional approach. The effectiveness of the presented approach has been verified by experiments on a networked control system of inverted-pendulum.