摘要
以太网的实时通信不确定性是其应用于实时性要求较高的工业控制系统中的障碍。交换式以太网的出现使这一问题得到了改善。采用网络演算理论作为以太网实时性能的分析方法,计算出星形和树形两种不同网络结构的交换式以太网的最大网络时延,分析了不同负载和不同数据量的情况下两种拓扑的实时性能,证明了交换式以太网良好的实时性能以及应用于实时工业控制中的可行性,并提出将以太网应用于高速磁浮列车的运行控制系统中的方案,保证了磁浮列车中信息的实时传输。
The application of Ethernet in industrial control systems with high specification in requirement of real time performance is limited because of its indeterminacy in real time communication. This demerit has been overcome due to the appearance of switched Ethernet. The maximum network time delays of switched Ethernet with star topology and tree topology are calculated, and the real-time performance of Ethernet with these structures under different loads and quantity of data is analyzed. The results indicate the feasibility of applying Ethernet in real time industrial control. The strategy of using switched Ethernet in control system of operation for the magnetic levitation trains is proposed. In this system, real time data transmission is ensured.
出处
《自动化仪表》
CAS
2006年第10期19-22,共4页
Process Automation Instrumentation
关键词
交换式以太网
最大时延
星形
树形
磁浮列车
Switched - Ethernet Maximum time delay Star topology Tree topology Magnetic levitation （ maglev ） train
