摘要
列车网络控制系统的可靠性设计与分配在权衡方案利弊、找出影响系统可靠性薄弱环节、促进设计改进等方面有非常重要的指导意义。文章从列车网络控制系统可靠性需求分析出发,研究了计算网络拓扑可靠性的理论技术,提出针对列车网络控制系统冗余架构的网络拓扑状态转移模型,并基于马尔可夫过程推导出网络拓扑可靠性计算的数学表达式;在此基础上,结合复杂度、技术发展水平、重要度、环境条件等影响因素,提出采用评分分配法进行系统部件的可靠性分配方法。最后,以实际应用项目为输入,验证了列车网络控制系统可靠性计算与分配方法。该方法有助于依据实际项目应用对网络控制系统的RAMS分配指标,设计列车网络控制系统拓扑结构,并给出RAMS设计合理性论证方法。
The reliability design and allocation for train network control systems play a significant guiding role in evaluating the advantages and disadvantages of different options,identifying weak links affecting system reliability,and promoting design improvements.This study analyzed reliability requirements for train network control systems and investigated theoretical technologies for calculations related to network topology reliability.On this basis,a network topology state transfer model for the redundant architecture of train network control systems was developed,and a mathematical expression for network topology reliability calculations was deduced from the Markov process.Furthermore,a scoring-based reliability allocation method for system components were proposed,considering multiple influencing factors,including complexity,technical development levels,importance,and environmental conditions.Finally,the proposed reliability calculation and allocation method for train network control systems was verified,based on inputs from practical applications.This approach has proven beneficial for topology design in train network control systems according to their RAMS allocation indexes in real-world projects and offers a basis for rationality demonstration of RAMS design.
作者
何人伟
赵镤
张学方
HE Renwei;ZHAO Pu;ZHANG Xuefang(Beijing Subway Operation Co.,Ltd.,Beijing 100044,China)
出处
《机车电传动》
2024年第4期163-170,共8页
Electric Drive for Locomotives
关键词
列车网络控制系统
网络拓扑
可靠性计算
可靠性分配
train network control system
network topology
reliability calculation
reliability allocation
