3 Flexible Trains (Conversion Model)

The train model describes all physical parameters of the train, that are necessary to calculate the brake intervention limits and derived limits.

For trains for which no suitable fix train model is stored in the ERTMS/ETCS on-board, the conversion model has to be used. These trains are called flexible trains. The values AD(V ) are calculated based on

3.1 The Flexible Train Model Properties Panel

The data that is necessary for the conversion model is entered in the flexible train model properties panel, see figure 4.

All properties of the flexible train model are stored in the flexible train model file (extension .flex). A flexible train model that has not been saved after the latest modification is marked with an asterisk ’*’ in its title in the tab pane.


PIC

Figure 4: The flexible train model properties panel


3.1.1 General Train Model Data

Data shown in this panel is necessary for both fix and flexible train models.

Masses

In order to consider the effect of track gradients, the quotient of the train rotating mass and the train mass is necessary.

If the train masses are either constant or determined by the train control or entered by the driver, they can be stated here.

If the rotating mass is unknown, select default rotating mass. In that case, also the train mass will not be used.

Train Brakes Type

Select the type of train brakes. In case of a passenger train with brakes different from UIC type brakes, select ”Passenger Train in P” as well.

Interfaces

Select whether the technical means are implemented for the ERTMS/ETCS on-board to order a full service brake or to cut off the traction independently from other actions (such as emergency brake command).

Other Values

Maximum train speed, the train length, the distance of the Eurobalise antenna from the front end and the time to cut off the traction after commanding the emergency brake need to be stated here.

3.1.2 Flexible Train Model Data

State the brake percentage as entered by the driver here and select whether the train is equipped with adhesion independent brakes.

3.2 Calculations

The data stated in the flexible train model properties panel will automatically be converted to the deceleration data whenever it is needed in a scenario. No user action is necessary.