Extended State Functional Observer-Based Event-Driven Disturbance Rejection Control for Discrete-Time Systems
针对存在未知不匹配扰动的离散时间系统，提出一种事件驱动输出反馈控制方法，通过降阶扩展状态函数观测器估计状态和扰动，并设计预测事件驱动控制器以节省网络资源，仿真验证了有效性。
In this article, an event-driven output feedback control approach is proposed for discrete-time systems with unknown mismatched disturbances. To estimate the unavailable states and disturbances, a reduced-order extended state functional observer is proposed, and by introducing an event-driven scheduler, the ZOH-based event-driven output feedback disturbance rejection controller is designed, and the stability and disturbance rejection analyses are performed. To further save the network resources, the predictive event-driven output feedback disturbance rejection control approach is proposed, and the stability and disturbance rejection analyses of the systems with predictive control are also conducted. It can be shown that the disturbances are compensated completely in output channels of the systems, and compared with the time-driven control schemes. And event-triggering frequency is greatly reduced with the proposed event-driven control methods. Finally, the effectiveness of the provided control approaches is demonstrated by numerical simulations.