The functional safety calculation of a real interlocking system in Turkey

Author

Anik, V.G. ; Ustoglu, I. ; Kaymakci, O.T.

Author_Institution

Control Eng. Dept., Istanbul Tech. Univ., Istanbul, Turkey

fYear

2011

fDate

13-15 April 2011

Firstpage

71

Lastpage

76

Abstract

In this paper the safety integrity level (SIL) of a railway station in Turkey is considered. The paper is one of the results of a project which is sponsored by the Turkish State Railways (TCDD) where an xo03 architecture is required. The calculations of the failure rates of railway components´ are carried out not only for the implemented 2003 interlocking system architecture but also for 1003 and 3003 architectures. Moreover the undetected dangerous failures of the interlocking system such as regulation, signalling, track circuit and point failures are given in terms of interlocking system components´ failure types and algorithm failures. This relationship is shown with the help of Fault Tree Analysis (FTA). Finally the safety integrity level and mean time to failure (MTTF) are calculated with the help of the Markov Graph.

Keywords

Markov processes; railway engineering; railway safety; statistical analysis; trees (mathematics); Markov graph; Turkey; Turkish State Railways; fault tree analysis; mean time to failure; railway interlocking system; railway station; safety integrity level; Railway accidents; Safety; Switches; FTA; Functional Safety; Interlocking; MTTF; Railway Systems; SIL;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics (ICM), 2011 IEEE International Conference on

Conference_Location

Istanbul

Print_ISBN

978-1-61284-982-9

Type

conf

DOI

10.1109/ICMECH.2011.5971217

Filename

5971217