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Safety analysis of the height control system for the Elbtunnel

机译:Elbtunnel高度控制系统的安全性分析

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A new tunnel tube crossing the river Elbe has been built in Hamburg until the end of 2002. Therefore, a new height control system was required. A computer examines the signals from light barriers and overhead sensors to detect vehicles, which try to drive into a tube with insufficient height. If necessary, it raises an alarm that blocks the road. This paper describes the application of two safety analysis techniques on this embedded system: model checking has been used to prove functional correctness with respect to a formal model. Fault tree analysis has validated the model and considered technical defects. Their combination uncovered a safety flaw, led to a precise requirement specification for the software, and showed various ways to improve system safety.
机译:到2002年底,汉堡已经建造了一条穿越易北河的新隧道管。因此,需要新的高度控制系统。计算机检查来自光栅和高架传感器的信号以检测车辆,这些车辆试图驶入高度不足的管子中。如有必要,它会发出警报,阻塞道路。本文介绍了两种安全分析技术在此嵌入式系统上的应用:模型检查已被用来证明形式模型的功能正确性。故障树分析已经验证了模型并考虑了技术缺陷。他们的结合揭示了一个安全缺陷,导致了对该软件的精确要求规格,并展示了各种提高系统安全性的方法。

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