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Under-Over steering: Analysis with EVO4 with gyroscope.
The image below shows how, thanks to EVO4 together with a gyroscope, it is possible to analyse the vehicle behaviour on the track in few steps.
Here below you see two track laps with different tunings of the front damper.
On the GPS tracing the math channel is plotted:
| IF(GT(GPS_Gyro,0),GPS_Gyro-Gyro,Gyro-GPS_Gyro) |
where:
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GPS_Gyro is the gyroscope value calculated by the GPS trajectory |
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Gyro is the gyroscope inertial sensor value |
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“IF(GT(GPS_Gyro,0)” is the condition to verify that the formula does not invert the sign with right/left corners |
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Oversteering is in red while under steering is in blue. |
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It is easy to note that internal trajectory A has more understeering compared to the external one B.
This setup improvement has been possible changing the front dumper tuning. |
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Using suspensions analysis, in fact, front suspensions have been noticed to be too rigid: this led to an excessive wheels solicitation mainly during the corner on the curb.
With a smoother tuning (red histogram), oversteering during the corner has been reduced (as highlighted in the figure). |
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| Download other sample files. |
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