Dynamic-Encoding-Based Non-Fragile Sliding Mode Security Control Under Single-Node Transmission Mechanism

This paper presents a dynamic-encoding-based nonfragile sliding mode security control strategy designed to tackle the challenges posed by random DoS attacks and controller gain perturbations in networked systems scheduled by Round-Robin protocol. Through the implementation of a dynamic quantizer and an encoding-decoding mechanism, uncertainties and external disturbances in network transmission are effectively mitigated. The attack-tolerant sliding mode controller is designed based on the attack occurrence modes, and a solving algorithm for controller gains is derived by handling randomly occurring gain perturbations. The research outcomes demonstrate that the proposed control strategy ensures the closed-loop system to achieve the required stability and performance criteria. The validity of the mentioned method and the robustness of the system against disturbances are confirmed through a simulation experiment.