【作者】 韩璞； 李超； 董泽； 崔秀政；

【Author】 HAN Pu~1,LI Chao~1,DONG Ze~1,CUI Xiu Zheng~1 1.School of Control Science and Engineering,North China Electric Power University,Baoding 071003,China

【机构】 华北电力大学控制科学与工程学院；

【摘要】 针对工业过程网络化控制系统中同时存在周期性任务和非周期性任务的问题,提出了一种基于综合调度指标的混合调度算法。利用网络QoS估计器获得当前网络状态。根据网络状态的变化和综合调度指标在线调整混合调度算法,达到改善系统运行性能的目的。机理分析和仿真试验表明,此算法可以有效地保证系统的实时性,减少数据包丢失,提高平均性能。更多还原

【Abstract】 Based on the comprehensive scheduling index,a mixed scheduling algorithm is proposed for the problem that periodic tasks and non-periodic tasks share network resources in industrial process networked control systems.A network QoS estimator is used to acquire current network states.In order to improve the network operational performance,mixed scheduling algorithm is adjusted on-line according to the current network status and comprehensive scheduling index.Both the mechanism analysis and simulation show that this algorithm has great real-time performance, low network packet loss and high average performance.更多还原