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 v
air (<vair_res>) and the wind yaw angle beta (<vair_beta>).