Cross Wind Correction

VECTO offers two different modes to consider cross wind influence on the drag coefficient. It is configured in the Vehicle File.


Speed dependent correction (Declaration Mode)

This is the default mode which is used in Declaration Mode.
The speed dependent cd x A curve (see below) is calculated based on generic parameters for each vehicle class and the base cd x A value form the Vehicle File.



Speed dependent correction (User-defined)

The base cd x A value (see Vehicle File) is corrected with a user-defined speed dependent scaling function. The input file (.vcdv) format is described here.




Correction using Vair & Beta Input

If available the actual (measured) air speed and direction can be used. The input file (.vcdb) defines the drag coefficient scaling factor. The input file (.vcdb) format is described here.
The driving cycle must include the air speed relative to the vehicle vair (<vair_res>) and the wind yaw angle beta (<vair_beta>).