网络控制系统的实时特性分析及数据传输技术

摘要

The data transferred in Networked Control System( NCS in brief)include real-time data and non-real-time data. Therefore,to meet the requirements of the application environment,reducing the transferring delay of real-time data to the most extent and assuring the reliable,fast transferring of non-real-time data is the key to realizing a NCS with high speed and quick response. The real-time property of NCS is analyzed and a model of information delay is presented on the basis of the analysis of the characteristics of data transferred in NCS together with the typical communication protocol model. Finally,focusing on the realization of real-time,this paper discusses some data transferring techniques based on DLL of the communication protocol model.%由于应用环境的要求，网络控制系统中传输的数据包括实时数据和非实时数据，实现高速、快响应的网络控制系统的关键是最大限度的降低实时数据的传输延迟，并保证可靠快速的非实时数据传输。文章在分析网络控制系统中数据特点的基础上，结合网络控制系统的典型通信协议模型分析了其实时特性，给出了信息延迟的组成模型，并基于数据链路层针对实时性的实现分析了几种典型的数据传输技术。