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Re: [Paparazzi-devel] Planes flies an eight-figure in AUTO2

From: Adrian Lauf
Subject: Re: [Paparazzi-devel] Planes flies an eight-figure in AUTO2
Date: Mon, 5 Apr 2010 09:19:21 -0500

Hi Joseph,

I'll chime in because I haven't done so in a while, but your problem seems familiar to me. I had this problem with my Alpha 40, and it turned out to be that the COURSE_PGAIN was way too high - the plane just overcorrects the entire time and never gets anywhere. I have mine set to -0.4. Also check that your ROLL_PGAIN isn't too low; you don't want oscillations, but you do want the plane to keep track of where it is more accurately. My bet is on the COURSE_PGAIN. Bring it to a more reasonable number and it should do wonders - my Alpha is flying amazingly well, and I'm going to be expanding to two more airframes. 

Also, once you've corrected your COURSE_PGAIN, make sure your waypoints aren't too close to eachother - that can be another problem. Best of luck,


On Mon, Apr 5, 2010 at 9:10 AM, Joseph Metz <address@hidden> wrote:

after buying an TwinstarII with TWOG and setting up the GCS (thanks to the guys at the Akaflieg Bremen) i read the manual and website several times carefully and did many testflights today.
The plane flies now perfect in AUTO1 mode but when i switch to AUTO2 it always flies eight-figures (Throttle off, elevator upwards with the value of PITCH_MAX_SETPOINT).
I changed many variables and diferent flightplans but nothing happened.
Here is a short movie of the failure: (switched on AUTO2 after 5 seconds).

I will do some more test flights and hope that someone can give me a hint which variable i have to change in the airframe-file.


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