摘要： 以太网应用于工业网络控制系统是控制网络的发展方向，但它采用的CSMA/CD媒体访问机理，对于一些时间要求严格的控制过程会造成响应时间的不确定性。在工业网络中采用交换以太网可以消除传统共享以太网中存在的网络操作的不确定性，从而有效提高网络控制系统的控制性能。该文从理论上分析并计算工业以太网的最大通信延时，通过伺服二阶PID数字网络控制系统实例，定量分析网络协议和网络负载对网络控制性能参数的影响，为网络控制系统的设计提供了理论分析依据。
关键词:
网络控制系统,
工业以太网,
实时控制,
伺服控制系统
Abstract: Applying Ethernet to industry’s network control system is the development direction of control network. However, Ethernet leads to undetermined response time in real-time control system because Ethernet medium access control CSMA/CD is the contention and has no maximum transmission delay guarantee. Switched Ethernet can eliminate the uncertainties in the traditional Ethernet operation, thus switched Ethernet leads to the dramatically improved performance. A Theoretical maximun communication delay in industrial Ethernet is analytically derived. Based on the simulation of servomotor PID digital network control system, the paper also evaluates the performance of the servomotor network control system under different network protocols and loads. This offers the basis of theory analysis for the design of the network control system.
Key words:
Network control system,
Industrial Ethernet,
Real-time control,
Servomotor control system
沈 青;桂卫华;杨铁军;. 基于工业以太网的实时控制性能分析[J]. 计算机工程, 2007, 33(01): 233-235.
SHEN Qing; GUI Weihua ; YANG Tiejun;. Real-time Control Performance Analysis Based on Industrial Ethernet[J]. Computer Engineering, 2007, 33(01): 233-235.