摘要
研究构建自律分散式铁路运营调度系统仿真平台的关键技术。为保证系统的稳定性,必须实现控制中心可靠地漂移。控制中心漂移分为被动切换(主备切换)和主动切换(子站向控制中心申请成为控制中心)2种方式。采用集中式快速分布式选举算法进行决策计算。为保证系统的可靠性,设置2个不同的时钟线程,分别对中间件进程和仿真平台进程进行监视。远程车站有本地和远程2种工作模式。子站远程模式切换的原理是子站通知控制中心后,双方交换子站输出信号的控制权限。系统中的控制信息传输是基于组播方式的。子站在本地控制模式下,采用组播通信技术使控制中心即时刷新信息;而在远程控制模式下,则是采用网络中间件提供的点对点通信为辅,组播通信为主的技术组合方案。为保证分散系统中数据的一致性,采用对象状态信息刷新时间间隔按指数递增的算法。构建的自律分散式动态控制系统仿真平台具有在线可扩展性、在线容错性和在线可维护性。
The paper focuses on the key technologies of simulation platform for autonomous decentralized railway operation and dispatching system. In order to ensure system stability, the reliable migration of control center must be implemented. The migration of control center is divided into two means as passive switch （primary-backup switch） and active switch （substation applies to control center for new control center）. The paper adopts centralized fast distributed algorithm to realize decision-making computing. For guaranteeing system reliability, two different clock threads are designed, one is used to monitor middleware processes and another is used to monitor simulation platform process. Remoter stations have two operation modes as local and remote one. The principle of substation remote switch is that both exchange control authority of signal output after substation informs control center. The transmission of control information is based on multicast method. Under local control mode, the substation uses multicast to make control center update information. Under remote control mode, multicast is taken as mainstay and pointto-point communication technology is supplemented. The algorithm, that exponent increases the update interval of object state information, is proposed for ensuring data consistency in decentralized system. The autonomous decentralized dynamic control system simulation platform has characteristics like online expandability, online fault tolerance and online maintenance.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2008年第2期109-113,共5页
China Railway Science
基金
国家创新基金资助项目(00C262251211336)
轨道交通控制与安全国家重点实验室(北京交通大学)开放课题基金资助项目(SKL2007K001)
关键词
铁路运营调度系统
自律分散系统
关键技术
Railway operation and dispatching system
Autonomous decentralized system
Key technology
