Abstract

The hardware safety of train control systems is ensured by structural redundancy introduction techniques. Three main functional designs are considered—a duplicated structure, a triplex majority structure, and a self-checking redundant structure. The failure detection procedure is executed using a control element synthesized on Zhegalkin’s basis (elements AND, OR, and Exclusive OR), which allows using elements with unilateral failures for excluding dangerous situations. The triplex majority structure allows defining a point of failure to the accuracy of the controlled set, as well as the failure of the respective operation channel. The probability of a potentially dangerous situations is estimated for each considered structure, and the techniques used are compared on the basis of an introduced specific efficiency factor. If we use this criteria, taking into cost, reliability, and safety into account, it will turn out that the best characteristics are found in the duplicated structure.

中文翻译：

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为微处理器列车控制系统提供硬件安全的方法

摘要

列车控制系统的硬件安全通过结构冗余引入技术来确保。考虑了三个主要功能设计-复制结构，三重多数结构和自检冗余结构。使用在Zhegalkin的基础上合成的控制元素（元素AND，OR和Exclusive OR）执行故障检测过程。），这允许使用具有单方面故障的元素来排除危险情况。三重多数结构允许将故障点定义为受控集的准确性以及相应操作通道的故障。对于每个考虑的结构，估计潜在危险情况的可能性，并根据引入的特定效率因数比较使用的技术。如果我们使用此标准，并考虑到成本，可靠性和安全性，则会发现在重复的结构中找到了最佳特性。