1 Introduction
1.1 Intention and Functions of ETCS Brake Model Tool
ETCS Brake Model Tool is intended for calculations related to ETCS
brake models in accordance with [Subset 026-3]. It supports the following
functions:
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Calculation of fix brake models:
- Based on the nominal decelerations
and the probabilistic characteristics of the train brakes, the on-board
correction factors are calculated.
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EBCL chart:
- The emergency brake distances of a fixed brake model are
displayed for all EBCL’s.
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Calculation of scenarios:
- For a given set of train model (fix or flexible),
track profile, national values and optionally normal service brake model,
the brake distances and supervision limits are calculated.
-
Comparison of scenarios:
- Two scenarios can be compared with respect
to resulting brake distances and supervision limits.
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Limits chart:
- The speed and distance limits related to one or two scenarios
are displayed graphically.
-
Export:
- Export of all calculated data in text format (XML or CSV). Export
of charts as vector graphic (SVG format) or bitmap (PNG format).
1.2 Terms and abbreviations
Table 1: Terms and abbreviations
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Term |
Meaning |
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BMI |
Brake Model Index, determines which of the brake
models created for a fixed train shall be used for
calculations if no brake is inhibited by trackside |
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EBCL |
Emergency Brake Confidence Level |
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project member |
Data structures necessary for calculations. The following
project members are defined:
- flexible train models
- fix train models
- normal service brake models
- sets of national values
- track profiles
- scenarios
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In ETCS Brake Model Tool and thus also in this document the names are
shortened to Tbu instead of T_brake_build_up and AD(V ) instead of
A_brake_emergency(V).
1.3 Conventions
- A term in slanted letters indicates a term with a certain meaning within
ETCS Brake Model Tool, e. g. a type of data objects.
- A term in bold letters indicates a menu, command or button name.
- A term in ’single quotation marks’ indicates a fixed term not directly
related to ETCS Brake Model Tool.
- A term in ”double quotation marks” indicates a name or a quote. It is
also used to indicate, that a term or statement is not literally correct
(e. g. a simplification or common but imprecise wording).
1.4 The Desktop
After starting ETCS Brake Model Tool, the graphical user interface will be
started and the latest project will be loaded automatically.
The desktop has the following areas:
- The menu bar.
- The tool bar.
- The member tab pane, with the active member presented in the active
tab. After start, no member is shown. If you click on some project
member in the project tree or if you create a new project member, all
its data will be shown in the member tab.
- If no brake component model of a fix train model is selected:
- The project tree showing the files in the project directory and
sub-directories.
- A panel showing some (optional) description of the member
currently shown in the member tab.
If a fix train model is active and a brake component model is marked: A
panel showing the properties of the marked brake component model, see
figure 6. If you click the mouse outside the brake component models table,
the project tree is shown again.
- A message output window displaying hints, warnings or errors occurring
during file operations and calculations.
- A status bar displaying hints, if an action could not be performed.