基于优先级预测器的无线网络化控制系统的动态传输策略  

Dynamic transmission strategy of wireless networked control system based on priority predictor

作　　者：闫文晓 赵云波 YAN Wenxiao;ZHAO Yunbo(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023)

机构地区：[1]浙江工业大学信息工程学院,杭州310023

出　　处：《高技术通讯》2023年第12期1286-1294,共9页Chinese High Technology Letters

基　　金：科技创新2030—“新一代人工智能”重大项目(2018AAA0100801);国家自然科学基金面上项目(62173317);安徽省重点研发计划(202104a05020064)资助项目。

摘　　要：本文针对无线通信网络中存在丢包的多包传输无线网络化控制系统(WNCSs),提出了一种基于预测器的动态传输策略,在几乎不增加信道资源占用的情况下显著提升系统稳定性。在多包传输的无线网络化控制系统中,由于通信资源的限制,传感器到控制器间的数据传输中出现丢包问题,影响控制系统性能。针对这个问题,本文首先设计了优先级预测器来预测下一时刻每个传感器数据对系统稳定性的影响,帮助系统决策每个传感器的发送优先级;再通过传输调节器对不同优先级传感器补偿相应的随机退避时间上限,进而让优先级高的传感器在随机退避的方式下优先传输;然后在此策略下设计控制器使系统稳定;最后通过数值仿真验证了本文策略的有效性。A dynamic transmission strategy based on a prioritized predictor is designed for wireless networked control systems(WNCSs)with multi-packet transmission,yielding dramatically improved system performance almost without any cost of increased communication channel resources.Due to the limited communication resources,packet dropouts are inevitable in multi-packet wireless networked control systems.To deal with such an issue,a prioritized predictor is first designed to predict the impact of each sensor data on the system stability at the next moment,for the purpose of determining the data transmission priority of each sensor.Then,a transmission regulator is designed to determine,for each sensor,the upper bound of its random backoff time,to ensure that a sensor with a higher priority transmits earlier.A controller is also designed to stabilize the system.Finally,the effectiveness of the proposed strategy is verified by numerical simulations.

关 键 词：无线网络化控制系统(WNCS) 多包传输 丢包 预测器 动态传输策略 指数稳定 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN92[自动化与计算机技术—控制科学与工程]