Event-Based Control Approach to Cyber-Security for Complex Discrete-time Networked Systems

This paper presents an observer-based FTA compensation strategy with ETM to enhance cybersecurity in discrete-time CPS. The proposed method leverages advanced mathematical lemmas and BMI resolution techniques to synthesize an output feedback control scheme capable of reconstructing system states and generating corrective control actions. By integrating Lyapunov theory, the approach formulates the control synthesis as an optimization problem with BMI constraints. A switching criterion dynamically adjusts control parameters, while the introduction of slack variables transforms the originally nonlinear BMI into a more tractable LMI form. This modification enhances computational efficiency and flexibility in solving the optimization problem. The effectiveness of the proposed strategy is validated through numerical simulations on a three-tank system, demonstrating its applicability in real-world CPS scenarios.