Geng Qing, Li Jinling, Li Li
School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.
School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.
ISA Trans. 2024 Aug;151:12-18. doi: 10.1016/j.isatra.2024.05.030. Epub 2024 May 18.
In this article, a quality of service (QoS) dependent variable sampling dynamic event-triggered control method is designed for a cyber-physical system (CPS) with delays and packets dropout to cope with non-ideal network environments, maintain the desired control performance and improve the communication efficiency. To achieve the variable period sampling, a sampler is designed based on the QoS of the wireless network by using the delta operator discretization method. Then, a variable period sampling scheme for the delta operator system converted from the CPS is designed. Furthermore, a dynamic event-triggered mechanism (DETM) is proposed using the variable period sampling signal, which can reduce event triggered data calculations and increase event triggered intervals. By utilizing the average dwell time (ADT) approach, sufficient conditions contains the explicit variable sampling period are derived for the derived switched CPS. Finally, the effectiveness of the designed method is verified by numerical examples.
本文针对存在时延和数据包丢失的信息物理系统（CPS），设计了一种基于服务质量（QoS）的变量采样动态事件触发控制方法，以应对非理想网络环境，维持期望的控制性能并提高通信效率。为实现变周期采样，采用增量算子离散化方法，基于无线网络的QoS设计了一个采样器。然后，针对由CPS转换得到的增量算子系统，设计了一种变周期采样方案。此外，利用变周期采样信号提出了一种动态事件触发机制（DETM），该机制可以减少事件触发的数据计算量并增加事件触发间隔。通过采用平均驻留时间（ADT）方法，为所得到的切换CPS推导了包含显式可变采样周期的充分条件。最后，通过数值算例验证了所设计方法的有效性。
