基于多包传输的网络控制系统的稳定性分析

在网络控制系统中,由于通信带宽的限制,使得数据的传输失败,以至于影响整个系统的稳定性。针对传感器采用时间驱动、控制器和执行器采用事件驱动的网络控制系统,提出了多包传输的解决方案。假定传输时延可以忽略,则采用多包传输的网络控制系统可以描述为一个具有N个事件的异步动态系统,即同时包含连续和离散动态的系统。其中连续动力学由微分或者差分方程描述,离散动力学由有限的自动开关描述,并由异步的离散事件驱动。针对受控对象状态均可测,控制律采用状态反馈的情况,利用双线性矩阵不等式方法,讨论了网络控制系统指数稳定的问题,并给出了系统稳定性的充分条件。

Stability Analysis on Multiple-Packet Transmission-Based Networked Control Systems

In the networked control system, all the data packets may not be permitted to be transmitted because of limited bandwidth of the communication network, which may deteriorates the system stability. Multiple-packet transmission method is developed to solve the problem, as the sensor node is time-driven, and the controller and actuator are event-driven. Assuming that the transfer delay is so small that it can be ignored, the networked control system based on multiple-packet transmission is an asynchronous dynamical system with N events, which incorporates continuous and discrete dynamics. The continuous dynamics is governed by differential or difference equations, whereas the discrete dynamics is governed by finite automata that are driven asynchronously by external discrete events. Using the bilinear matrix inequality method, the system's exponential stability is discussed with the status feedback control when the system state is acquirable.