网络控制系统中采样周期问题研究综述

Survey on Sampling Period in the Networked Control Systems

网络控制系统（NCS）的采样周期决定了网络交换信息的频繁程度，其选择会影响NCS的性能和网络的利用率，本文首先介绍了采样周期对NCS性能的影响，然后从定常采样周期、变采样周期和多率采样三个方面整理了近年来NCS中采样周期的研究成果和进展，最后，总结了NCS中采样周期的调度方法和NCS中关于采样周期研究方面需要继续解决的问题。

Sampling period of network control system （NCS） determines the frequency of the information exchange in the network and will influence the performance and utilization of NCS. In this paper, the impact of sampling period on the performance of NCS is introduced firstly. Then, some research results and the latest progresses of the sampling period in NCS in recent years are enumerated from three aspects： constant sampling period, variable-sampling period and multi-sampling. Finally, the scheduling method based on sampling period and some problems which need to be solved in the future study are summarized.