一类面向网络化控制的QoS策略框架设计与实现

Design and Implementation of QoS Guarantee Strategy Framework for Networked Control System

针对网络化控制系统存在丢包、时延等典型问题,本文从网络资源服务优化的角度展开研究,构建了面向网络化控制中间件的服务质量(Quality of Service,QoS)语义模型和服务模型,提出了多层次的QoS保证策略、QoS资源服务算法;在一类网络化控制中间件原型系统上开展构件网络资源满足仿真实验,结果表明,通过对任务节点的带宽和优先级进行建模,实现控制信息流的合理、高效传输,从而达到缩短网络时延,改善网络性能,使得构件的资源满足率能达到0.3左右.

In order to solve the typical problems of packet loss and delay in the networked control system, a research was conducted from the perspective of service resources optimization. The QoS semantic model and service model were built for the networked control middleware. The multi-level QoS guarantee strategy deployment algorithm and QoS resources service algorithm were presented. On a class of networked control middleware prototype system, a simulation experiment of network resources satisfaction of components and component deployment was conducted. The results show that, by properly adjusting the bandwidth and priority of the task node, the controlling information can be efficiently transmissed, thus shortening the network time delay,improving the network performance and increasing the efficiency of the controller. The component resources satisfaction rate reaches to about 0.3.