Adaptive control of uncertain nonlinear systems under two-channel denial-of-service attacks

This paper focuses on the control of uncertain nonlinear systems in the presence of two-channel denial-of-service attacks. To mitigate communication interruptions and performance degradation induced by attacks, a continuous-time adaptive controller is first designed. To further improve communication resource utilization, an event-triggered mechanism based on system states and parameter estimation errors is introduced, and a digital controller is accordingly developed. These schemes effectively eliminate Zeno behavior while maintaining system performance. Under this framework, a new Lyapunov function is constructed to ensure the boundedness of all closed-loop signals. The effectiveness of the proposed control strategies is rigorously demonstrated through numerical simulations.