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Re: [Paparazzi-devel] Why the rotorcraft always rotate(yaw is unstable)?

From: Felix Ruess
Subject: Re: [Paparazzi-devel] Why the rotorcraft always rotate(yaw is unstable)?
Date: Sat, 26 Jul 2014 18:54:51 +0200


did you check if the mag works and the yaw (psi) is estimated correctly?
Also please check if your RC is really sending a zero yaw command with the yaw stick in neutral position.
(In GCS go to the settings tab and change the telemetry to PPM mode, then check the yaw in the ROTORCRAFT_RADIO_CONTROL message.

Cheers, Felix

On Mon, Jul 21, 2014 at 4:55 AM, Eltonwu <address@hidden> wrote:
I use the config file "quadrotor_lisa_m_2_pwm_spektrum" to download the
software to my board. Everything seem to be ok, and the rotorcraft can fly
basiclly with tuning the PID of roll & pitch with the

But I got a problem is that the rotorcraft is always rotate in same
direction,so I can't control it. I try to tune the PID of the yaw? But not
work well,still rotate.

I think the magnetometer is calibrated as the wiki says.
I try to modify the code to force the yaw output is 0. I want to see how the
craft behavior without yaw PID control. finally I see the craft also rotate
in a same direction.

At last, I sorry for my poor English, I don't know whether I express my
words exactly.

Does anyone have any idea ?

Thanks in advance!!

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