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:

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.
EBCL chart:
The emergency brake distances of a fixed brake model are displayed for all EBCL’s.
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.
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


Term

Meaning





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



EBCL

Emergency Brake Confidence Level



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





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

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.


PIC

Figure 1: The desktop


The desktop has the following areas: