|Subject:||Re: [Paparazzi-devel] Umarim lite 2.0 gyro going crazy|
|Date:||Sun, 3 Mar 2013 18:15:21 -0500|
Date: Sat, 02 Mar 2013 10:51:08 +0100
From: Gautier Hattenberger <address@hidden>
Subject: Re: [Paparazzi-devel] Umarim lite 2.0 gyro going crazy
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These values are really strange. A software issue is pretty difficult to
imagine when looking at IMU_RAW data, except if it is directly related
to the I2C driver and a bad transaction is unlikely to produce this kind
of error. By any chance, do you have a logical analyzer to look at the
data coming out of the sensor ? A still possible that it has been damage
during mounting or because of a shock.
Le 02/03/2013 00:47, Joseph Muhlhausen a ?crit :
> I tried for a few hours yesterday and still no luck. It is not
> perfectly reproducible but if I wait long enough the gyro will start
> acting crazy. (Attached is a plot of the three gyro axis with the
> board steady on a table)
> I have also tried the original Umarim Lite firmware with no luck.
> I am starting to think that it's an hardware problem. Is there anyway
> to know if it's hardware or software related?
> I am using v4.2 and my config file is based off the umarim_lite_v2.xml
> Date: Wed, 27 Feb 2013 17:34:24 -0500
> From: Joseph Muhlhausen <address@hidden
> To: address@hidden <mailto:address@hidden>
> Subject: [Paparazzi-devel] Umarim lite 2.0 gyro going crazy
> <address@hidden <mailto:address@hidden>>
> Content-Type: text/plain; charset="iso-8859-1"
> Hello everyone,
> I was happy to have fixed my interference issue, but when I got
> home and
> wanted to do some tests, the servos started acting crazy in AUTO 1
> mode. I
> looked at the PFD and it just goes in every direction very quickly. I
> tried the different ahrs but it didn't really help.
> I looked at the raw data, the accelerometer seemed fine. The
> gyroscope on
> the other hand had values between 0 to 10000 while still.
> Rotating the board 90, 180, -90, -180 as well as waiting steady
> for the
> gyro to align helped a lot. However when letting the plane still
> for a long
> time I can still see the gyro going off once in a while. I am
> afraid it'll
> do the same in flight.
> I saw that Luke had a similar issue but on a stm32 system:
> I would like to try the same solution but I am not sure which
> function to
> use on LPC21/umarim
> Paparazzi-devel mailing list
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