Secure Stabilization of Switched T‐S Fuzzy Systems Under Aperiodic DoS Attacks via State Estimation and Hybrid‐Triggered Approach

ABSTRACT This paper primarily investigates the observer‐based hybrid‐triggered control for nonlinear switched systems under denial‐of‐service attacks, where high‐frequency jamming signals may occur within certain intervals. First, the nonlinear plant is represented by a Takagi‐Sugeno (T‐S) fuzzy model, which decomposes the system into a set of local linear subsystems. Second, taking the persistent dwell‐time regularity as the foundation, a double‐layer switched model is constructed, incorporating the switched system and attack modes. On this basis, an observer‐state‐constrained triggering mechanism is proposed to mitigate attacks. Then, combining a piecewise Lyapunov function jointly affected by attack signals and controller modes, the analysis of global exponential stability is carried out and comprehensive conditions of the controller are derived. In addition, by explicitly analyzing the minimum interval between effective events, the exclusion of Zeno behavior is guaranteed. Finally, two simulation examples are provided to verify the proposal.