网络化控制系统中的多包传输

Multiple-Packet Transmission in Networked Control Systems

在网络化控制系统中,由于传感器和执行器分布很广而且数据包容量有限,多包传输不可避免。多包传输影响网络化控制系统的稳定性,甚至引起系统失稳。研究了传感器采用时间驱动方式,控制器和执行器采用事件驱动方式的网络化控制系统的多包传输问题。采用状态反馈控制器稳定系统并提高系统的动态性能;利用增广状态向量的方法,建立了网络化控制系统的异步动态系统模型;运用异步动态系统理论和李雅普诺夫方程,分析了网络化控制系统指数稳定问题,得到了系统的稳定性判定定理。

The multiple-packet transmission in networked control systems is inevitable because a data packet contains limited informarion, and the sensors and actuators are extensively distributed. It degrades the system stability and even makes the system unstable. The multiple-packet transmission in networked control systems was investigated, in which the sensors were time-driven, the controller and actuators were event-driven. This paper employed a state feedback controller to stabilize the system and improve the system dynamic performance, utilized an augmented state vector method to establish the asynchronous dynamical system model, and used the asynchronous dynamical system theory and a Lyapunov function to analyze the exponential stability for the networked control systems and obtain the stability theorem.