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网络控制系统是指通过网络形成闭环的实时反馈控制系统。针对同时具有网络诱导时延和数据包丢失的网络控制系统,研究了其建模、稳定性分析与控制器设计的问题。所考虑的网络诱导时延为小于一个采样周期的短时延,既可以是定常的也可以是时变的;随机丢包过程是具有普遍意义的任意丢包过程,其数字特征不必先验得到。运用Lyapunov方法,得到保证闭环网络控制系统渐进稳定的充分条件以及状态反馈控制器的设计方法。最后,通过仿真结果证明了方法的有效性。
Network control system refers to the closed-loop real-time feedback control system formed by the network. Aiming at the networked control system with both network induced delay and packet loss, the problems of modeling, stability analysis and controller design are studied. The considered network induced delay is a short delay less than one sampling period, which can be either stationary or time-varying. The random packet loss process is an arbitrary packet loss process with a general significance. The digital characteristics need not be obtained a priori . By using Lyapunov method, the sufficient conditions for the asymptotic stability of the closed-loop network control system and the design method of the state feedback controller are obtained. Finally, the simulation results show that the method is effective.