摘要
网络控制系统是一种分布式时间系统 ,具有严格的实时性要求 ,系统中包括周期性通信、随机性通信和突发性通信 ,其中周期性通信的实时性对于系统的性能来说是最重要的。本文基于数据链路层数据传输策略 ,从逻辑令牌传递和信道竞争两个角度分析了周期性通信的实时性 ,给出了实时性满足的充分条件 ,为网络控制系统的设计提供了理论依据。
Networked Control System is a kind of distributed timed system which demands strict real time deadline.The communications in the system are classified into three types:cyclic,stochastic and burst out and the real time of cyclic communication is the most important one to the performance of the system.Based on the data transfer policy of Data Link Layer the real time property of cyclic communication is analyzed from the two point of view of logical token passing and channel competition. The sufficient conditions of real time fulfillment are presented as the theory basis for the design of Networked Control System.
出处
《测控技术》
CSCD
2001年第6期1-4,共4页
Measurement & Control Technology
关键词
网络控制系统
周期性通信
实时性
现场总线
Networked Control System
cyclic communication
real time
logical token passing
