H_∞ control of networked control systems based on state preestimation

An approach of H_∞ controller design based on time driven and state preestimation technologies was presented for a class of networked control systems with stochastic large time delay (this delay is larger than sample period). The control state of current period was preestimated by the last state and the time delay, and the output was calculated by relative control law. The H_∞ suboptimal controller was given by the cone complementarity linearization algorithm and linear matrix inequalities (LMIs). Numerical example shows the effectiveness and feasibility of the proposed condition and controllers design procedure.