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Obsolescence management in rail signalling systems: concept and Markovian modelling

机译：铁路信号系统中的过时管理：概念和马尔可夫模型

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摘要

Obsolescence is one of the most common reasons for the premature replacement of signalling systems. One of the major reasons for obsolescence is the short lifespan of hardware/software components, which seem to be replaced with newer technologies almost on a daily basis. As a result, it is critical that line replaceable units (LRUs) or lowest level replaceable units (LLRUs) be available over the lifetime of the system and be monitored systematically. Obsolescence monitoring and detection is currently done through linear methods which have many issues due to the non-linear nature of the parameters as well as the inter-dependency of elements. The purpose of this paper is to describe the obsolescence concept in rail signalling and introduce a Markovian obsolescence detection model to avoid early system obsolescence. Normally, suppliers support their customers worldwide with obsolescence monitoring in order to obtain early information on equipment obsolescence issues. Nevertheless, to sustain effective obsolescence management, agencies should allocate adequate resources such as personnel, budget and tools. An obsolescence plan/strategy is discussed in this paper and can be applied across a system's lifecycle. Such an obsolescence plan should be backed up by supply chain strategy during the system lifecycle in conjunction with asset management.
机译：过时是过早更换信号系统的最常见原因之一。报废的主要原因之一是硬件/软件组件的使用寿命短，几乎每天都会被更新的技术所取代。因此，至关重要的是，在系统的整个生命周期中，都必须有管线可更换单元（LRU）或最低级别可更换单元（LLRU），并且必须对其进行系统监控。目前，过时监视和检测是通过线性方法进行的，由于参数的非线性性质以及元素的相互依赖性，线性方法存在许多问题。本文的目的是描述轨道信号中的过时概念，并引入马尔可夫过时检测模型来避免早期系统过时。通常，供应商通过过时监视为全球客户提供支持，以获取有关设备过时问题的早期信息。但是，为了维持有效的过时管理，机构应分配足够的资源，例如人员，预算和工具。本文讨论了过时的计划/策略，可以将其应用于系统的整个生命周期。这种过时的计划应在系统生命周期中与资产管理一起通过供应链策略进行备份。

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