Outlier-Resistant Non-Fragile Control of Nonlinear Networked Systems Under DoS Attacks and Multi-Variable Event-Triggered SC Protocol

In this article, the outlier-resistant (OR) observer-based secure control problem is investigated for nonlinear networked systems under randomly activated denial-of-service (RADoS) attacks and stochastic communication (SC) protocol. In virtue of zero-order holder (ZOH) technique, an attack compensation scheme is adopted to alleviate the adverse effects brought by RADoS attacks. By introducing multiple internal dynamic variables (MIDVs), a novel multi-variable event-triggered stochastic communication (MVET-SC) protocol is put forward to enhance the design flexibility and prevent the occurrence of data conflicts. Moreover, the non-fragile fuzzy controller is applied due to the inaccuracies in practical applications. Comprehensively taking the above factors into account, the asymptotic stability of the augmented fuzzy system can be ensured under the presented sufficient criteria. Meanwhile, the parameters of the OR observer-based secure controller are derived according to the obtained design conditions. In the end, a simulation example of mass-spring-damping system (MSDS) demonstrates the validity of the non-fragile secure control approach with OR observer.