Dwell-Time-Based Event-Triggered Control for Reaction-Diffusion Systems With Non-Collocated Sensors and Actuators Over Delayed Networks
Lisha Yan, Zhen Wang, Huang Xia, Hao Yang Shen · IEEE Transactions on Circuits and Systems I Regular Papers · 2025
This paper investigates the exponential synchronization of reaction-diffusion systems with communication delays and non-collocated sensor-actuator deployments. To mitigate the communication resource wastage inherent in traditional continuous-time control, a dwell-time-based event-triggered scheme is proposed, which effectively reduces the frequency of control signal updates. A limited number of sensors are spatially deployed to measure local average signals, and only valuable data are transmitted through the proposed event-triggered mechanism. To address communication delays induced by bandwidth constraints and locally distributed actuators, a spatiotemporal-dependent switching system is constructed. Subsequently, sufficient conditions for ensuring exponential synchronization are derived by constructing appropriate Lyapunov functionals that accommodate both collocated and non-collocated sensor-actuator configurations. Finally, numerical simulations and an image encryption application validate the effectiveness of the proposed approach. The results demonstrate that the method improves delay tolerance by allowing a larger sensor distribution ratio without modifying actuator placement, offering practical insights for the design of efficient and robust networked control systems.