Observer‐based dynamic event‐triggered control for nonlinear networked systems subject to actuator saturation and periodic denial‐of‐service attacks

Abstract This paper proposes an observer‐based dynamic event‐triggered control strategy for a class of continuous networked nonlinear systems with actuator saturation and periodic denial‐of‐service (DoS) attacks. Initially, by segmenting DoS attacks into active and dormant periods, an attack‐correlated observer is proposed. Then, the system is modeled as a switched system. To further reduce the amount of communication and improve the robustness of the system, the dynamic event‐triggered mechanism (ETM) is designed. Next, the conditions for local exponential stability are derived by using a segmented Lyapunov functional. Finally, the codesign parameters for the state observer, controller, and dynamic ETM are determined by solving LMIs. The effectiveness of the proposed controller strategy is validated through simulation. These results show that system states can converge to the origin with overshoot and undershoot kept under 2%, while the dynamic ETM optimizes the use of limited connectivity resources.