Re: [Paparazzi-devel] Problem with QUAT heading in AHRS subsystem

[Christophe De Wagter]

Just checking, but you did scale the magnetic vector AHRS_H_X,Y,Z to a size of 1? (X^2+Y^2+Z^2) = 1.0

-Christophe 

On Mon, Jul 9, 2012 at 2:33 PM, Sergej Krukouski <address@hidden> wrote:

Hallo!

 

I use the Booz hardware with int_cmpl_quat as AHRS subsystem.

I’ve calibrated mag on the imu, so with the euler AHRS my rotorcraft is perfect stable.

For the quat AHRS I filled up AHRS_H_X, AHRS_H_Y, AHRS_H_Z from the NOAA site and use the same calibration data as for euler.

But I found out following problem: the heading angle is unstable. When I rotate the rotorcraft too fast, the yaw (psi) angle follows too slow the body and the rotorcraft becomes unstable (in HOVER_Z_HOLD mode).

 

What could I do wrong here?

 

Thanks!

Sergey

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