[solved] Accelerometer Drift--caused by Vibration?

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spagoziak
Posts: 171
Joined: Thu Jan 20, 2011 1:18 am

[solved] Accelerometer Drift--caused by Vibration?

Post by spagoziak »

Hello folks,

After doing a complete overhaul on my mini quad, I rebuilt the core of my frame--new foam tape, new craft foam on top. The trouble is this: now the quad drifts pretty seriously in random directions when hovering in level or horizon mode. Acro mode is 100% perfect. No listing, no shuddering, nothing. When the quad is in flight (horizion mode is great, thank you Alex!), the thing flies beautifully. It's just this wandering in hover that I can't puzzle out.

Just for the sake of testing, I fiddled with the level PIDs. Over the course of that process, I added a total of 1.5 to P and .2 to I with no change in behavior.

Have any of you had this experience? I can't figure out what has changed so dramatically. I even added two more slices of black foam and tightened the zip ties. Nothing seems to affect this thing, but I know that isn't really the case. There is a reason it's happening, so there's a way to stop it.

Is there a way to filter the ACC code as there is for the Gyro?

Full size pictures here.

Image

Image

Your expertise is appreciated.

spag
Last edited by spagoziak on Tue Apr 09, 2013 9:24 pm, edited 1 time in total.

spagoziak
Posts: 171
Joined: Thu Jan 20, 2011 1:18 am

Re: Accelerometer Drift--caused by Vibration?

Post by spagoziak »

I figured it out!

There was *too much* padding on that board. I removed the layers of black foam pictured above and tightened the board down on the arms. Problem solved.

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