摘要： 在网络控制系统(NCS)中,网络诱导时延通常是随机的,且丢包过程同时存在于反馈通道和前馈通道中。针对含短随机时延和异步丢包的网络控制系统稳定性问题,采用不确定系统参数矩阵以克服双通道上随机时延对NCS分析的影响,进而考虑双通道均存在丢包的情况,将NCS建模为具有4个事件率约束的异步动态系统。根据传感器-控制器与控制器-执行器双通道的数据包丢失率,设计状态反馈控制器,稳定NCS闭环指数。通过物联网考勤机的无线传输控制系统实例验证了该方法的有效性。

关键词: 网络控制系统, 随机网络诱导时延, 异步丢包, 状态反馈, 指数稳定

Abstract: In Network Control System(NCS),the network-induced delay is usually random,and packet dropout often presents in both the backward and the forward channels.Aiming at this problem,stabilization is studied for NCS with random time delay and asynchronous packet dropout.Uncertain systems matrix is used to avoid the influence of random time delay existed in both S-C and C-A channels,and then NCS is modeled as an asynchronous dynamical system with four rate constrains on events by considering packet dropout.The state feedback exponential stability is proposed for the closed-loop NCS.A state feedback controller that depends on S-C packet dropout rates (packet dropout rates from sensor to controller),and C-A packet dropout rates (packet dropout rates from controller to actuator) is designed.An illustrative example of wireless transmission NCS in the Internet of things is given to demonstrate the effectiveness of the proposed method.

Key words: Network Control System(NCS), random network-induced time delay, asynchronous packet dropout, state feedback, exponential stability

中图分类号: 

• TP393