EAST极向场电源现场总线多任务实时调度的研究  

Research of fieldbus multitasks real-time scheduling in power supply system for EAST poloidal field

作　　者：杨亚龙[1] 傅鹏[2] 何诗英[2] 

机构地区：[1]安徽建筑工业学院电子与信息工程学院,安徽合肥230022 [2]中国科学院等离子体物理研究所二室,安徽合肥230031

出　　处：《电源技术》2012年第5期711-715,共5页Chinese Journal of Power Sources

基　　金：国家九五重点科技攻关类项目[(1998)1303]

摘　　要：以太网现场总线广泛应用于工业控制系统中,但以太网CSMA/CD介质访问控制机制使其难以适应高实时性控制过程。针对实时性要求极高的EAST极向场电源控制系统,分析了现场总线网络中存在的实时性问题,设计了一种多任务实时调度策略。采用新的调度策略优化网络后,硬实时任务可以确保在截止期前完成。实验结果表明,网络满足了电源控制系统的高实时性要求。Ethemet fieldbus has been widely applied in industrial control system. However, it is hard to meet the high real-time requirement of control process, because the Ethernet medium access control CSMA/CD has no maximum transmission delay guarantee. In order to meet the extremely high real-time requirement in EAST poloidal field power supply system, the real-time performance of the Ethernet fieldbus network is analyzed and a Multitasks real-time scheduling mechanism is designed. Applying the scheduling mechanism, all the hard-real-time tasks in the network can be completed before deadline. The experimental results show that the scheduling mechanism is efficient.

关 键 词：极向场电源 以太网 现场总线 多任务实时调度 

分 类 号：TM910[电气工程—电力电子与电力传动]