Discussions

Posted by Miguel Silva on April 18, 2014 at 11:50am

Hi, i have a pixhawk instaled and version 3.1.2.

in flight without radio yaw movement in keeps moving a litle bit side to side.

Check this movie to see this movement. was flying in loiter mode.

Here is log for this flight

and also this

when i stop near the trees is very noticable this movement.

also in file my PID setings after autotune.

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Mauricio Guerrero October 26, 2014 at 10:25am

I had a similar problem with my own pixhawk. It sat still on the ground pointing south and the heading reported on MP was north and slowly spinning counterclockwise turning full circles. I did many calibrations, compassmots what have you until i hit the problem. Under the advanced params section there is a "Use Compass for yaw" and it was set to "disabled". This meant that the GPS provided the heading and the GPS does so based on the direction of your movement. So if your gps position is changing even though your physical position is the same your reported heading and yaw will change. After I set this param to "enabled" I finally got a solid heading.

TL;DR: full params> COMPASS_USE set to 1
Miguel Silva April 19, 2014 at 12:56am

Guys anyone can Help???

is this PID tuning of Yaw? I have read that nobody tunes the Yaw PID. I just have autotuned the quad, all calib, compas, radio , imu.

Please help
- Edgar Scott > Miguel Silva April 24, 2014 at 5:54pm
  
  Miquel, I don't think the autotune helps the yaw, in fact I asked the same question as I had the same problem.
  
  But I found this and posted a message to get another guys PIDS, maybe it will help you too, I will say it seems like a lot of people are having this issue.
  
  http://diydrones.com/forum/topics/apm-3-1-rc4-yaw-pid-tuning?xg_sou...

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