Re: [Paparazzi-devel] Drotek imu calibration problem

[Chris]

Hi Felix
I checked the scaled values and it was over 20m/s so i switched to the 
calculated defines

<define name="ACCEL_X_NEUTRAL" value="61"/>
<define name="ACCEL_Y_NEUTRAL" value="6"/>
<define name="ACCEL_Z_NEUTRAL" value="-67"/>

<define name="ACCEL_X_SENS" value="4.87542830698" integer="16"/>
<define name="ACCEL_Y_SENS" value="4.89064537368" integer="16"/>
<define name="ACCEL_Z_SENS" value="4.81527520369" integer="16"/>

With the above values i get 9.81m/s but the artificial horizon starts to 
drift immediately and after 10 seconds is upside down. With the older 
values it worked ok i think but the scaled values were just above 20m/s 
(the neutral values are ok).
What could be wrong?
Btw i obtained those values by following the directions in the wiki 
(create log files etc)
Chris


On 04/10/2013 04:27 AM, address@hidden wrote:
> the calibration result looks good. Did you create the log with the same
> subsystem/configuration?
> To check your scale, please switch telemetry to scaled_sensors and make
> sure you get -9.81 m/s? on z when the IMU is level.
>
> Cheers, Felix