Re: [Paparazzi-devel] IMU Problem after BungeeTakeoff?

[antoine drouin]

same scenario, but this time, i also made the filter without heuristic
use the magnetometer for yaw only ( I believe that is what arduimu
does ).
You notice that the error is even worse ( up to 35 degres now).


On Mon, May 16, 2011 at 3:55 PM, Gautier Hattenberger
<address@hidden> wrote:
> Hi,
>
> The arduimu_basic code has some special tricks to try to detect high
> acceleration when launching (high throttle, low speed) and prevents the imu
> from using accelerometers. I'm still removing some bugs, but it seems to
> work (although it's only a stupid hack in the end...). Antoine's filter
> seems to be a bit clever than that.
>
> Gautier
>
> On 16/05/2011 13:35, Lange Dennis (langede0) wrote:
>>
>> Hi
>>
>> We're using the arduino-basic code and the Kalman Filter for GPS-Data
>>
>> Dennis
>>
>>
>> Am 14.05.2011 05:15, schrieb antoine drouin:
>>
>> Hi Dennis
>>
>> What filter are you using ?
>>
>> On Sat, May 14, 2011 at 12:38 AM, Lange Dennis (langede0)
>> <address@hidden>  wrote:
>>
>> Hi all
>>
>> We would like to develop an autonomous Bungee-Takeoff. We have written a
>> routine that actually works. In the first seconds of the start it looks very
>> good. But then the UAV starts to decline again. But the log file sayd that
>> the UAV wants to climb all time. And we also saw that the PFD did not show
>> the right position.
>> So we believe that the IMU has an error because of the acceleration during
>> the takeoff.
>>
>> We also tried the BungeeTakeoff from the OSAM-Team>>  same problem
>>
>> Has anyone else had this problem? Or does someone have a solution?
>> We considered to control the angle of attack with an extra sensor during
>> takeoff. Can it work?
>>
>> Thanks in advance
>>
>> Dennis
>>
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