轨道交通安全计算机可靠性分析

Reliability Analysis of Vital Computer in Railway

轨道交通安全计算机是保障轨道交通安全、可靠运营的核心技术装备。文章描述了轨道交通常用安全计算机架构,通过可靠性分析对其关键可靠性指标进行计算。在常用冗余架构的基础上提出一种改进的安全计算机架构,通过与目前常用架构的对比,改进的安全计算机架构可以大幅提升系统可靠性,可广泛应用于轨道交通安全性、可靠性苛求的系统/产品。同时文章描述的可靠性分析方法及结果可为其他安全计算机可靠性分析提供参考。

Railway transit vital computer is the core equipment to ensure the safe and reliable operation of train. The common architecture of vital computer on rail transit was described, and the key reliability indexes by reliability analysis was calculated. An improved vital computer architecture was proposed based on the common redundant architecture in this paper. By contrast with currently commonly used architecture, the improved architectures can significantly improve system reliability, and can be widely used in railway system or product which demanding high traffic safety and reliability. The reliability analysis method and results described in this paper can be referred by other vital computer reliability analysis.