Racelogic VBOX User Manual page 145

Smoothing Distance
The smoothing routine is calculated between the current and previous samples. The previous sample to be used is
determined using a Smoothing Distance, this results in a variable number of samples used to determine the
smoothing level on the heading; the lower the speed the more samples that are used. With 100 Hz logging and a
smoothing distance of 1.1 m at 80 km/h, the heading is calculated over the previous 5 samples, whilst at 15 km/h the
heading is calculated over the previous 26 samples.
Select 'SMOOTHING DIST' and enter the smoothing option between 0.00 m and 2.00 m. A smoothing distance of
2.00 m is recommended.
Speed Threshold
Due to the large number of sample in a small distance when travelling at low speed the heading channel can become
very noisy, this in turn results in many of the Vehicle Separation channels becoming noisy at low speed. When the
speed threshold is set to a certain speed the heading is locked when the vehicle travels under that speed.
1. To set the speed threshold repeat steps above in 'Heading Smoothing', then select 'SPD THRESHOLD' and enter
the speed threshold option.
2. We recommend a Speed Threshold of 5 km/h.
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