Fuzzy H∞ control of nonlinear DC microgrids under aperiodic DoS attacks - an event-triggered approach

This paper studies the fuzzy H-infinity control of nonlinear DC microgrids subject to the dynamic event-triggered mechanism (ETM), aperiodic DoS attacks, noises and mismatching premises. First, usingthe information of DC microgrid's T-S fuzzy model and aperiodic DoS attacks, a discrete-time resilientdynamic ETM is proposed, which can save constrained system resources, as well as actively excludeattack-induced dropouts and Zeno behaviour. Second, a fuzzy switched system model is built, whichprovides a unified platform to evaluate effects of all the affecting factors such as the dynamic ETMand DoS attacks. Third, by constructing a piecewise Lyapunov functional, criteria for exponentialstability with guaranteedH(infinity)performance are obtained, and an event-triggered fuzzy injection cur-rent controller is further designed. Simulation results confirm that, in the presence of aperiodic DoSattacks and noises, the proposed controller can stabilise the nonlinear DC microgrids, while thedynamic ETM works well in reducing the triggering rate without dropouts. Tradeoffs can be madebetween control and communication resources, and the proposed fuzzy controller achieves shortersettling times and smaller overshoots than the robust controller