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Chapter 10. openETCS Model 0 (CONST) double double > Current Train Speed bool Do not allow negative speed values. Emergency Brake Value Figure 10.15.: Reverse movement protection as gSubFunctionBlock graph In contrast to the supervision of train speed in respect to a constant top or ceiling speed in Unfitted or Staff Responsible, here the speed is additionally controlled corresponding to the end of the current valid MA. Furthermore, the allowed speed at the end of a MA must not always be 0. This supervision corresponds to a typically braking curve supervision [67, pp. 95-97] and is represented in the model by an oBrakingToTargetSpeed (BTS) object (see Subsection 7.3.2). “Current V_LOA” (v loa ) holds the speed that is currently permitted at the end / limit of authority, and “Distance of EoA” is the absolute position of the end of the authority. In the case that v loa > 0 and the train has overpassed the end of authority, it can move with v loa until a certain overlap distance [89, pp. 35-47] is passed. In this case, the Mode is switched to Trip, which is modelled by the “c12” oModeGuard object in Figure 10.16. 10.2.6. Trip Mode Trip Mode is always activated if an operational 4 failure occurs that requires the train fully to stop. This can be, for example, the case for an overpassed stop signal and a corresponding balise telegram or if the balise linking supervision (see Subsection 10.2.4) fails. According to the ETCS SRS, Trip is not available in Application Level 0 [88, p. 23] but in all other levels. This is in conflict with the fact that Trip is also reachable from Unfitted [88, p. 37] (see Figure 10.1 for the corresponding model). Furthermore, successor Modes of Trip can only be Post Trip (oModeGuard “c62”) and Unfitted (oModeGuard “c7”) while condition 62 or rather oModeGuard object “c62” is defined as (the driver acknowledges the train trip) AND (the train is at standstill) AND (the ERTMS/ETCS level is 0) [88, p. 58] Since this is in conflict with definition of available Application Levels for Unfitted in the SRS [88, p. 23], Unfitted is also modelled for Level 0 in this case study. The main functionality in Trip is to stop the train by applying emergency brakes until the train is fully stopped. 4 Compared to system failures, operational failures are related to the train operations and not to the train control system. 194
10.2. Data and Control Flows in ETCS Modes c1 c12 c17 Application Level: 0 c21 c28 bool bool bool bool bool bool System Isolated by Driver End of Authority Overpassed Balise Link Error Switch to Unfitted DMI Desk Closed by Driver c29 c37 c65 c66 bool bool bool bool Driver Selected Power Off Switch to Staff Responsible via Override Incompatible Data Received Balise Direction Error T bool New Linking Received Sub-Function: Dynamic Speed Profile Supervision Sub-Function: Telegram Evaluation in Full Supervision COMMUNICATION READER Sub-Function: Monitoring of National Values Sub-Function: Reverse Movement Protection T COMMUNICATION READER bool New National Values received Sub-Function: Balise Linking Consistency Monitoring Sub-Function: DMI in Full Supervision T bool New Transition Order Received COMMUNICATION READER Level 1 (CONST) bit Stored ETCS Level T bool New MA Received COMMUNICATION READER Emergency Brake Value bool EMERGENCY BRAKE POS_OUT double Current Train Position ODOMETER V_OUT double Current Train Speed Service Brake Value double SERVICE BRAKE Figure 10.16.: Full Supervision Mode in Application Level 1 195
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Open Source Software for Train Cont
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Datum des Promotionskolloquiums: 21
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Acknowledgments I would like to tha
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Abstract This document describes th
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Contents 3.3.3. Rascal . . . . . .
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Contents 8.4. Behavioural Design .
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Contents D.3. Domain Framework Mode
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List of Figures 6.4. Simple CORBA u
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List of Figures 10.27. General read
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Chapter 1. Introduction Railway Con
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Chapter 1. Introduction MontiCore M
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Chapter 1. Introduction ERTMS Forma
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Part I. Background 9
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Chapter 2. Concepts for Safe Railwa
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Chapter 3. Domain-Specific Modellin
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4The GOPPRR Meta Meta Model - An Ex
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4.1. Concrete Syntax Description Fo
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4.2. GOPPRR C++ Abstract Syntax Mod
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4.2. GOPPRR C++ Abstract Syntax Mod
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4.5. The Object Constraint Language
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4.5. The Object Constraint Language
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4.6. Tool Chain where artefacts are
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4.7. Conclusion External Artefacts
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Part II. Dependability 55
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Chapter 5. Verification and Validat
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6Security in Open Source Software A
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6.1. Memory Management Open Meta Me
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6.2. Hardware Virtualisation a fixe
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6.2. Hardware Virtualisation in a v
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6.2. Hardware Virtualisation Again,
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6.2. Hardware Virtualisation the fa
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Part III. openETCS Case Study 77
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Chapter 7. openETCS Meta Model gEVC
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Appendix A. GOPPRR to MOF Transform
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Appendix B. openETCS Meta Model Con
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DopenETCS Domain Framework D.1. Dom
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D.2. Domain Framework Source Code 8
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D.3. Domain Framework Model 32 m_pT
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Appendix E. openETCS Generator 39 <
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Appendix E. openETCS Generator 200
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Appendix E. openETCS Generator 46 4
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FMetaEdit+ Generators F.1. GOPPRR X
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GopenETCS Unit Testing G.1. Unit Te
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Appendix H. openETCS Simulation 14
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Glossary ANTLR ANother Tool for Lan
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Glossary EVC An European Vital Comp
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Glossary OEM An original equipment
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Glossary XML The Extensible Markup
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Bibliography [12] “EN 50128 - Rai
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Bibliography [39] ——, ““Ope
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Bibliography [69] T. J. Parr and R.
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Index Artefact, 51 Automatic train
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Index Linux, 149 Memory management,
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