Product category:
Linear Position Sensors
News Release from: Oxford Technical Solutions | Subject: RT Inertial and GPS measurement system
Edited by the Engineeringtalk Editorial
Team on 14 March 2008
GPS system compensates for slanted test
tracks
The "surface roll" and "surface pitch" outputs on the RT products' CAN bus compensate for the inclined angle of the track.
Measuring roll and pitch on an inclined or tilted test tracks can lead to irregularities in test results An RT Inertial and GPS measurement system from OxTS allows users to compensate for this problem
This article was originally published on Engineeringtalk on 29 Mar 2007 at 8.00am (UK)
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Although perfectly horizontal tracks are desirable, they are not always practical.
After rain it takes a very long time for a horizontal track to dry.
Flat inclined tracks dry much faster because the inclined surface allows the rain to drain off.
However, the measurements from these tracks show anomalies in roll, pitch, body acceleration and slip angle.
These anomalies disrupt testing and need to be compensated for.
The effect is most visible in the roll and pitch angles, especially during circle tests.
On the uphill sections of inclined test tracks the pitch is positive whereas it is negative on the downhill section.
The same problem occurs with the roll where the vehicle rolls one way at the top of the hill and the other way at the bottom.
The new "surface roll" and "surface pitch" outputs on the RT products' CAN bus compensate for the inclined angle of the track.
Quick configuration software is used to measure the inclination angle of the track and download it to the RT measurement system.
The software also gives a statistical measure of how flat the surface is.
The new measurements on the CAN bus will output the roll and pitch compared to the surface, not compared to gravity.
The true roll and pitch (compared to the horizontal) are still output as normal and are not affected.
Laser height sensors are no longer the solution on inclined tracks.
Surface roll and surface pitch measurements from the RT Inertial and GPS measurement systems give you more information about the behaviour of your vehicle and in a format that is easily interpreted.
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