Survey on Sampling Period in the Networked Control Systems

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.