Accelerometer
Hi
I´m using a basic accelerometer (memsic 2125) to calculate the distance that the robot have moved. I have a proplem with that the values keep changing now and then even if the accelerometer stands absolutely still.
I hade an idea that the robot could callibrate the accelerometer when it stands still. Put to know if the robot is absolutely still i need to use the eccelerometer...
Have someone had the same proplem? Do someone know how I can fix this? Are there an another good way to say if the robot isn't moving (It's a quite big robot so it doesn't work to look just if the engines are moving because of the skid risk)?
Please help me...
/Hoffa
I´m using a basic accelerometer (memsic 2125) to calculate the distance that the robot have moved. I have a proplem with that the values keep changing now and then even if the accelerometer stands absolutely still.
I hade an idea that the robot could callibrate the accelerometer when it stands still. Put to know if the robot is absolutely still i need to use the eccelerometer...
Have someone had the same proplem? Do someone know how I can fix this? Are there an another good way to say if the robot isn't moving (It's a quite big robot so it doesn't work to look just if the engines are moving because of the skid risk)?
Please help me...
/Hoffa
Comments
EDIT: Which values keep changing, the acceleration, or your calculated position? If it's the latter, then quantization error could very well be the problem.
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Paul Baker
Propeller Applications Engineer
Parallax, Inc.
Post Edited (Paul Baker (Parallax)) : 3/14/2007 5:39:19 PM GMT
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Cheers,
Simon
BTW: I type as I'm thinking, so please don't take any offense at my writing style
www.norfolkhelicopterclub.co.uk
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