The railway system proposed in this paper is an autonomous interlocking system that assigns a unit to each track circuit and wires the units according to the track topology to achieve the function required of the entire system. The functions of each unit are represented by monotonic logic functions. The units are characteristic in that by themselves can accomplish fail-safe error characteristics. The processing procedure of conventional interlocking systems consists of the following steps. Step 1 (confirmation of competing routes): Confirmation of the fact that no competing routes are set for the route to be established. Step 2 (control of branch direction): Diversion control of route-related switches in the desired direction. Step 3 (interlock control): Maintenance of the branch condition and prohibition of setting of competing routes. The above processing has been traditionally configured by using the centralization concept that control should be performed based on the information of the entire line. In the paper a decentralized interlocking system is proposed that assigns a unit to each track circuit and wires the units according to the track topology to achieve the function required of the entire system. The system consists of safety-related and non-safety related functional parts. The control requirements of signal aspects and switches are assigned to the non-safety-related parts, and the safety-related parts perform safety confirmation processing to judge whether or not the requirements are acceptable. This separation and the introduction of duality conversion help to achieve the safety confirmation desired of the interlocking system by the monotonic logic functions.


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    Titel :

    Method for constructing decentralized interlocking system operating on per-track-circuit basis


    Weitere Titelangaben:

    Synthese eines dezentralen Gleisverriegelungssystems auf der Basis individueller Steuerkreise


    Beteiligte:


    Erscheinungsdatum :

    2004


    Format / Umfang :

    10 Seiten, 12 Bilder, 2 Tabellen, 3 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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