Safety-level communication in railway interlockings
نویسندگان
چکیده
منابع مشابه
Verification of Railway Interlockings in Scade
We present two modelling approaches for the application of model checking to verify railway interlockings. The first translates so-called Ladder Logic into Scade language, the second models a segment of railway from scratch. The verification tool used is Scade.
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In this paper we present a verification strategy for signalling principles for the control of a railway interlocking system written in ladder logic. All translation steps have been implemented and tested on a real-world example of a railway interlocking system. The steps in this translation are as follows: 1. The development of a mathematical model of a railway interlocking system and the trans...
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The safety analysis of interlocking railway systems involves verifying freedom from collision, derailment and run-through (that is, trains rolling over wrongly-set points). Typically, various unrealistic assumptions are made in order to facilitate their analyses. In particular, trains are invariably assumed to be shorter than track segments; and generally only a very few trains are allowed to b...
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Railway signalling systems have received a great deal of attention from the formal methods community. One reason for this is that the domain is relatively accessible; another is that the safety analyses to be undertaken are often highly parallelizable. In this paper we describe a ‘cloud interface’ for the refinement checker, Failures Divergences Refinement (FDR), which has been motivated and va...
متن کاملSimulated Time for Testing Railway Interlockings with TTCN-3
Railway control systems are timed and safety-critical. Testing these systems is a key issue. Prior to system testing, the software of a railway control system is tested separately from the hardware. Here we show that real time and scaled time semantics are inefficient for testing this software. We provide a time semantics with simulated time and show that this semantics is more suitable for tes...
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ژورنال
عنوان ژورنال: Science of Computer Programming
سال: 1997
ISSN: 0167-6423
DOI: 10.1016/s0167-6423(96)00033-0