Depiction of simulations results

In principle, the following applies to all drawing structures created with the ELITECAD module tractrix curve:

• The vehicles created in the vehicle path are objects and are assigned to the Tractrix curve layer.
• The created contour lines are polygons and assigned to the Tractrix curve layer.
• The area requirement is outlined by a polygon. The created polygon is assigned to the Tractrix curve layer.
• The infill is assigned to the Tractrix curve layer.

Additionally, all elements created by the tractrix curve can be removed again using Undo.

Vehicle path

A sequence of outlines of the vehicle selected for the simulation is inserted into the drawing at the previously defined distance Increment. The following example classification structure is assigned to the newly created model with the display variant vehicle path:

Information of model: vehicle drawing  
Level : GeoSchlepp  
Class : 03 CarCampingtrailer  
Group : (-60.233,15.357)  
Layer (layer) : Tractrix_curve  
Object (object) : Car_with_camping_trailer  
Vehicle_name (Vehicle_name) : Car_with_camping_trailer  
Algorithm (Algorithm) : Everling-Schoss  
Increment (Increment) : 0.500000m  
Vehicle_width (Fz_width) : 1760  
Vehicle_length (Fz_L) : 4740  
Wheelbase (Fz_AA) : 2700  
Front_overhang (Fz_UH) : 1100  
Turning_radius_diameter (FZ_WD) : 11.700  
Coupling lenth (FZ_KP) : 3800  
Trailer_width (A_width) : 2500  
Trailer_length (A_LH) : 4000  
Rear_overhang (A_UHH) : 2000  
Drawbar_length (A_DL) : 3000

• The model is displayed according to the selected depiction options (e.g. is displayed vehicle path = vehicle drawing, contour lines = each relevant vehicle corner, area requirement = area requirement, area requirement with infill = area requirement with infill) of the corresponding designation for the displayed simulation result.
• The Class is assigned the name of the vehicle file without the file name extension. Blanks in the names of the vehicle file are replaced with an underscore.
• The Group is assigned the CAD-Coordinates of the starting point of the guide line.
• Das attribute Vehicle_name is assigned the vehicle name from the def-file. Blanks in the vehicle names are replaced with an underscore.
• Dem attribute Algorithm is assigned the previously selected simulation algorithm type.
• For Increment, the increment that was set for the simulation is selected.

As for the remaining attributes, they are all pulled from the simulation parameters, the selected vehicle dimensions and vehicle properties and documented. That means, with this data in hand, any tractrix curve created can be reproduced at a later time.

Contour lines

The (outer) curves describing the important points of the vehicle outline during a simulation are drawn.
The following example classification structure is assigned to the newly created model with the display variant Contour line:

Information of model: A1_axle_left  
Level : GeoSchlepp  
Class : TractorTrailer  Group  : (-60.208,15.797)  
Layer (layer) : Tractrix curve  
Object (object) : Tractor_with_trailer  
Vehicle name (Vehicle name) : Tractor_with_trailer  
Algorithm (Algorithm) : Everling-Schoss  
Increment (Increment) : 0.500000m  
Vehicle_width (Fz_width) : 1810  
Vehicle_length (Fz_L) : 3390  
Wheelbase (Fz_AA) : 2390  
Rear_overhang (Fz_UH) : 500  
Turning_radius_diameter (FZ_WD) : 7.000  
Coupling length (FZ_KP) : 2890  
Trailer_width (A_width) : 2220  
Trailer_length (A_LH) : 5200  
Rear_overhang (A_UHH) : 2200  
Drawbar_length (A_DL) : 4100

The label of the model A1_axle_left means that the selected contour line is the line that describes the path of the point on the outer left of the axle of the 1st trailer part.
The trailer in the vehicle combination Tractor with trailer is a single-axle trailer. The contour line A1_axle_left ", in this case (left curve), is the contour line of the vehicle combination that is furthest to the inside.

Area requirement

The area needed by the selected vehicle combination is represented by a closed polygon.
The following example classification structure is assigned to the newly created model with the display variant Area Requirement:

Information of model: Arearequirement  
Level : GeoSchlepp  
Class : Semi-trailer_truck  
Group : (-59.863,14.867)  
Layer (layer) : Tractrix curve  
Object (object) : Semi-trailer_truck  
Vehicle name (Vehicle name) : Semi-trailer_truck  
Algorithm (Algorithm) : Everling-Schoss  
Increment (Increment) : 0.500000m  
Vehicle_width (Fz_width) : 2500  
Vehicle_length (Fz_L) : 6080  
Wheelbase (Fz_AA) : 3800  
Rear_overhang (Fz_UH) : 850  
Turning_radius_diameter (FZ_WD) : 15.800  
Coupling length (FZ_KP) : 3070  
Trailer_width (A_width) : 2500

Area requirement with infill

The area needed by the selected vehicle combination is represented by a closed polygon with infill.
The following example classification structure is assigned to the newly created model with the display variant Area requirement with infill:

Information of model: Arearequirementinfill  
Level : GeoSchlepp  
Class : Semi-trailer_truck  
Group : (-59.863,14.867)  
Layer (layer) : Tractrix curve  
Object (object) : Semi-trailer_truck  
Vehicle name (Vehicle name) : Semi-trailer_truck  
Algorithm (Algorithm) : Everling-Schoss  
Increment (Increment) : 0.500000m  
Vehicle_width (Fz_width) : 2500  
Vehicle_length (Fz_L) : 6080  
Wheelbase (Fz_AA) : 3800  
Rear_overhang (Fz_UH) : 850  
Turning_radius_diameter (FZ_WD) : 15.800  
Coupling length (FZ_KP) : 3070  
Trailer_width (A_width) : 2500  
Trailer_length (A_LH) : 13610  
Rear_overhang (A_UHH) : 4251  
Drawbar_length (A_DL) : 7750

Turning radius diameter

If a steering solution is required during the simulation along a guiding line that is not possible with the turning radius diameter stored in the vehicle master data, the following error message appears:

The problem area is marked with a circle for the user in the drawing. The system default colour for the circle is red. The colour and the line type for the error markings can be modified by clicking the Assign pen and line types button found in the tractrix curve parameter window and changing the settings for the Warning markers.

The following example classification structure is assigned to the markings of the problem areas within the newly created model:

Information of model: Error  
Level : GeoSchlepp  
Class : Road train  
Group : Turning radius  
Layer (layer) : Tractrix curve  
Object (object) : Semi-trailer_truck  
Algorithm (Algorithm) : Everling-Schoss  
Increment (Increment) : 0.500000m  
Vehicle_width (Fz_width) : 2500  
Vehicle_length (Fz_L) : 9700  
Wheelbase (Fz_AA) : 5280  
Rear_overhang (Fz_UH) : 2920  
Turning_radius_diameter (FZ_WD) : 20.600  
Coupling length (FZ_KP) : 7700  
Trailer_width (A_width) : 2500  
Trailer_length (A_LH) : 7450  
Wheelbase (A_AAH) : 4840  
Rear_overhang (A_UHH) : 1260  
Drawbar_length (A_DL) : 3410

Correct guide line

Even if the option Round guide line in the tractrix parameter window is selected, it can happen that the guide lines are not automatically corrected at a point. This can happen when, for example, the straight-line segment is too short to allow for automatic rounding. If this occurs the following error message is shown:

The points on the guide line where no sufficient corrective rounding could be implemented are marked in the drawing with a circle. The pen and the line type for these circles are defined in the same way as the problem areas with the turning radius diameter from the Tractrix curve parameter window > Assign pen and line types > Warning markers.

Information of model: Error  
Level : GeoSchlepp  
Class : wd=20.600m  
Group : Rounding  
Layer (layer) : Tractrix curves

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