AC-3.1 autotune support discussion

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- - - - Shaun Bell > leonardthall September 24, 2015 at 7:56am
        
        Thanks for looking at those logs! The tune between those was very similar to the last one, but the pitch and roll didn't track as well. Think I'll use the yaw from the first tune though. It's a little abrupt on the last tuning, not so good for video work : )
        
        Developer
        
        leonardthall > Shaun Bell September 24, 2015 at 2:44pm
        
        Hi Shaun,
        
        Definatly use the last tune for Yaw!!!!
        
        Then just back the ATC_ACCEL_YAW back to get the feel you want.
- Shaun Bell > Shaun Bell September 23, 2015 at 5:26pm
  
  Here's the dropbox links to the autotune logs:
  
  Autotune 01 https://www.dropbox.com/s/sr3cuukrpivg1aw/autotune01.bin?dl=0
  
  Autotune 03 https://www.dropbox.com/s/j6u3gzk2hf6pba6/autotune03.bin?dl=0
  
  Attached are the short log files of the X8 flying after each autotune.
  
  Flight01.bin
  
  Flight03.bin
  
  Dropbox - Error
  
  Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!
Cala September 19, 2015 at 4:37pm

Video isn't possible to see now, says that is private; It's only my issue?
Alex Elkman September 19, 2015 at 11:40am

Hey guys I can't get AutoTune to work with these SimonK ESC at all. Testing without batteries plugged to computer via USB confirms AutoTune mode engages. The copter does not start twitching or calibrating itself when testing with batteries.

I have some trim settings set, will that interrupt the process from starting?
- Developer
  
  leonardthall > Alex Elkman September 19, 2015 at 4:30pm
  
  Hi Alex,
  arducopter will interpret the trims as the pilot trying to take control and pause autotune.
  
  Sounds like you need to level the copter.
  - Alex Elkman > leonardthall September 19, 2015 at 4:31pm
    
    Great, I suspected as much. Will save trim and reset on tx and retry. Much thanks.
Michael Kachalin August 19, 2015 at 12:41am

Hi,

I tried to do autotune, but battery was not enough to complete even one axis (~11 minutes). Is there a way to continue autotune after battery change?

Actually, I failed to do normal manual PID tuning procedure too, as even with P=0.22 on pitch and roll I still have no oscillations and as I understand going for bigger values is not recommended.

Thank you,

Michael
- Developer
  
  leonardthall > Michael Kachalin August 19, 2015 at 2:17am
  
  Hi Michael,
  
  If you send me your log I should be able to give you better starting parameters based on your tune.
  
  To do a manual tune, increase Rate_D until you get some oscillation, then back it off by 25%. Do the same for Rate_P. It doesn't matter how high it goes, your setup may need it.
  
  Your log should tell me much more.
  - Michael Kachalin > leonardthall August 23, 2015 at 5:16am
    
    Hi Leonard,
    
    Thank you.
    
    Here are three logs from my attempt to autotune:
    
    https://www.dropbox.com/s/e78f4kdnwrp670e/73.BIN?dl=0 attempt to autotune all axes
    
    https://www.dropbox.com/s/wxbuipf98at8ai1/74.BIN?dl=0 roll (or pitch?) only
    
    https://www.dropbox.com/s/qijv8tmy455lclf/75.BIN?dl=0 yaw only
    
    Log below is my manual tuning in Alt Hold mode.
    
    https://www.dropbox.com/s/1dfgha9q9ur9l17/79.BIN?dl=0
    
    There should be limitations on every value, as power of the system is not infinite, so you think, they are more than recommended 0.25 for P? With my current settings hexa is quite responsive on pitch and roll but very lazy on yaw. Haven't tuned I for any of the axes yet.
    
    73.BIN
    
    Shared with Dropbox

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AC-3.1 autotune support discussion

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