Quote:
Originally Posted by Russ Beavis
This may be a bit of a stretch but when you're using graphs in LabVIEW, look out for autoscaling of axes. Is it possible that you're not really seeing noise but are instead observing a change in the acceleration axis' scale?
In LabVIEW, if you right-click on a graph's axis, you can change a number of parameters such as autoscaling and linear/log scaling.
Just a thought.
Has another else observed noisy accelerometer readings while driving motors?
Another test to run - put your robot on a stand so that it's not moving at all and observe the accelerometer readings with the motors off and motors running. Is there a difference even though the robot is on a stand? If so, you're probably coupling some motor current noise into your accelerometer reading (or into the power supply for the accelerometer).
Russ
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We had the graphs at autoscale, but realized how stupid that was for differentiating between really tiny noise and actual values. They now are at a range at like -5 to 5 or -20 to 20. I can't remember.
The immobile robot motor test sounds like a good test. We'll have to try that on Saturday to see if the motors actually affect the sensor.
Thanks
-Tanner