DoS 攻击下具有状态约束的非线性系统网络安全控制

This paper investigates the secure stabilization problem for nonlinear systems subject to state constraints and denial of service (DoS) attacks. A hybrid sampling mechanism integrating time-triggered and event-triggered strategies is developed, based on which a class of safety and security controllers is designed via barrier functions. The proposed method can strictly enforce the prescribed state constraints while effectively reducing communication usage and exhibiting strong fault tolerance against DoS attacks. Theoretical analysis shows that the resulting closed-loop system is semi-globally asymptotically stable, which confirms the feasibility of the proposed control law in terms of both stability and robustness. Numerical simulations further demonstrate that, under DoS attacks with frequency and duration lying in certain ranges, the proposed method can rapidly suppress external disturbances and drive the system states to converge to the equilibrium point, thereby significantly improving the anti-disturbance capability and operational reliability of the system under DoS attacks.