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Artykuły :: Telematics :: ATST

Execution of contradictory commands in automatic line block system
W. OLPIŃSKI
2010-01-05 10:02:29

Title:

Execution of contradictory commands in automatic line block system

Authors:

W. OLPIŃSKI

Afiliation:

Railway Scientific and Technical Centre, Chłopickiego 50, 04-275 Warszawa, Poland,

Keywords:

railways, signalling, line block

Abstract:

The automatic line block system may be constructed as a chain of autonomous distributed set of functional blocks located along a railway line section, interlocked by the data transmission subsystem and controlled from two ends of the section. Thus, a certain possibility of simultaneously issued contradictory commands creating conflicts during their execution to be settled by a functional block controlled by them particularly while the data transmission subsystem failure occurs have to be considered. Testing of automatic line block system proper functioning in a range of reaction to contradictory commands and examples of typical conflicts and general rules of solving them are discussed in the paper.

Bibliography:

[1] EN 50129:2007, Railway applications: Safety related electronic systems.
[2] EN50159-1:2001, Railway Applications: Communication, Signalling, and Processing Systems - Part 1: Safety-related Communication In Closed Transmission Systems.
[3] OLPIŃSKI W., Opinion on automatic line block SHL-12 type in single section version., CNTK, task 4171/10, Warsaw, December 2006.
[4] OLPIŃSKI W., TORUŃ A., Automatic line block SHL-1 computer system adapted to co-operation with Ebilock 950 type interlocking system. Technical opinion., CNTK, task 4250/10, Warsaw, June 2007.
[5] OLPIŃSKI W., TORUŃ A., Rapport from exploitation test of the automatic line block system SHL-1 version 01 type., task 4283.04/10, Warsaw, May 2008.
[6] OLPIŃSKI W., Automatic line block SHL-1 version 01 type. Technical opinion., CNTK, task 4283.04/10, Warsaw, September 2008.
[7] OLPIŃSKI W., Automatic line block SHL-12 version 02 computer system. Technical opinion, CNTK, task 4362.04.10, Warsaw, March 2009.
[8] Principles of Technical Approval for Signalling and Communications Technology - Mu 8004, Deutsche Bundesbahn..
[9] Safety requirements for railway signalling systems introduced as binding by General Direction of Polish State Railways document no. KA2b-5400-01/98, Warsaw, February 1998.

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