基于HSRN的地铁综合监控系统可靠性分析

地铁综合监控系统负责整个地铁中所有设备的监视及控制,其能否有效运行直接关系到地铁的安全稳定运营,从而决定了对地铁综合监控系统可靠性的高要求。本文首先对地铁综合监控系统进行分析,包括其完成的功能、系统层次划分及硬软件架构等;然后综合考虑系统工作站、服务器与FEP设备的硬软件组件的相互作用关系、子系统设备间的不同冗余方式及系统整体结构对地铁综合监控系统进行可靠性分析,同时,针对随机回报网(SRN)用于复杂系统可靠性分析时的状态空间爆炸及模型的可读性问题,提出适用于地铁综合监控系统可靠性分析的层次SRN(HSRN)可靠性模型;最后,以广州某实际地铁综合监控系统可靠性分析为例,验证该方法的可行性及有效性,也为其他待建的地铁综合监控系统可靠性设计提供依据。

Reliability Analysis on Integrated Supervision & Control System in Metro Based on HSRN

The integrated Supervision & Control System(ISCS) in metro monitors all devices of the subway,its ability to operate effectively directly relates to the subway’s security and stabilization,which determines the high reliability requirements for the ISCS in metro.The ISCS in metro was analyzed firstly,including its functions,system hierarchy partition,and hardware/software structure,etc.Then,considering the interactions between hardware and software components of workstations,servers and FEP for ISCS,different redundancy modes of subsystems devices,and the overall structure of the system,the reliability of the system was analyzed.Meanwhile,with regard to the state space explosion and the readability of Stochastic Reward Net(SRN) for the complex system reliability analysis,the Hierarchical SRN(HSRN) of the reliability model for the ISCS was established.Finally,the reliability analysis of actual ISCS in Guangzhou metro was taken as an example to prove the feasibility and effectiveness of this method,it also provides a basis for reliability design of other ISCSs to be built.