网络控制系统的时延和负载分析  

Analysis of Delay and Load in Networked Control Systems

作　　者：杨丽曼[1] 李运华[1] 

机构地区：[1]北京航空航天大学自动化学院,北京100083

出　　处：《控制与决策》2006年第1期68-72,共5页Control and Decision

基　　金：北京市自然科学基金项目(3052011)

摘　　要：针对运动体机械和大型制造装备多机电子系统协调运动控制所涉及的控制网络的特殊性,分别从控制和网络两方面给出了回路时延和网络时延的界定,并从目的、性质和获取方法等角度进行了比较.通过对网络时延的特性和评价指标的理论分析和数学描述,指出在系统运行过程中网络负载和负载波动是产生时延和时延抖动的直接原因,进一步讨论了控制网络中的负载构成和具体的估计方法.仿真结果验证了理论分析方法的有效性.Aiming at the particularity of control network, involved in the coordinated motion control of multi- mechatronic-subsystem in large manufacturing devices and mobile machines, the conceptions of loop-delay and network-delay in view of control and network are proposed, and their intentions, properties and acquiring methods are compared. Theoretical analysis and mathematical description about characteristics and evaluating indicators for network-delay, indicate that network load and load fluctuation are the direct causes of delay and delay jitter during the system running. Furthermore, the network load composition and an estimating method are discussed. The simulation results verify the validity of the proposed theoretical analysis methods.

关 键 词：网络控制系统 时延 网络负载 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]