Observer-Based Decentralized Event-Triggered Control for a Class of Uncertain Systems Under a Vulnerable Communication Network

This article concerns the observer-based control problem of state-dependent uncertain systems under a vulnerable multichannel communication network with deception attacks and transmission delays. A decentralized integral-based event-triggered scheme is constructed for the tradeoff between bandwidth utilization and control performance. The decentralized triggered data from different channels are organized and timely uploaded to the observer by a group of data buffers in the control unit, such that the event-triggered security control strategy can be realized. Different from most of the existing studies adopting identical attack behaviors in multiple channels, the deception attacks are assumed to compromise each channel independently, which results in that the considered security control problem cannot be solved by the existing results. To deal with this case, a coordinated design criterion for the controller gain, observer gain, and decentralized event-triggered scheme is developed in the form of linear matrix inequalities based on the Lyapunov stability theory. Finally, the effectiveness of the proposed method is illustrated via the Chua's oscillator circuit system.