综述了目前网络控制系统的研究现状 ,介绍了随机延迟问题、数据包丢失问题和多通道输出问题的建模以及各种控制策略。在此基础上 ,分析了网络控制系统稳定性研究中尚待解决的问题以及一些新的研究方向 The current research status of network control system is reviewed. Random delay, packet loss and multi-channel output modeling and control strategies are introduced. On this basis, the problems to be solved in the research of network control system stability and some new research directions