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APM 3.2 QUADCOPTER Err: EKF_CHECK-2 / Err: FAILSAFE_ EKF-1

Posted by Gonzalo Garat on December 15, 2014 at 4:26am

Hi all,

I'm attaching my log from our last flight as our little quad went completly bonkers before it crashed.

Short after takeoff it went completly out of control, no response at all from RC or Telemetry and then crashed near a pond (thank god).

But the mistery was about to begin when we started reviewing the log and found out that the trigger was the failsafe error Err: EKF_CHECK-2 / Err: FAILSAFE_ EKF-1.

In understand these two were recently added to APM, but this ain't the first time I see this sort of thing happening.

I'm attaching my log in hopes for some guidance.

Thank you all!

2014-12-14 11-10-14.log

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Replies

- - WR > Ted Morgan May 6, 2015 at 4:06am
    
    Not sure how you attached the bin..
    
    here is a link to mine in drop box
    
    https://www.dropbox.com/s/631xegi2gfq6b99/2015-04-06%2013-46-59.bin...
    
    Dropbox - Link not found
    
    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!
    - Andy Piper > WR May 6, 2015 at 4:16am
      
      Later on in the log it looks like bad vibrations, but the initial error looks like the OP - huge requested Yaw triggering an EKF fail error. Your ErrYaw is also huge all the way along, so you should look at the vibrations anyway.
      - WR > Andy Piper May 6, 2015 at 4:33am
        
        what is a OP
        
        Mark Slater > WR May 6, 2015 at 9:59am
        
        Opening Post
    - WR > WR May 6, 2015 at 4:12am
      
      Found out how to Attach file.. here are a few logs from when the error was occurring..
      
      2015-04-11 15-35-56.bin
      
      2015-03-10 14-19-42.bin
      
      2015-04-06 13-46-59.bin
      - Andy Piper > WR May 6, 2015 at 4:26am
        
        You have bad vibrations. You should fix those - it is the cause of most of your problems.
        
        WR > Andy Piper May 6, 2015 at 4:29am
        
        Bad Vibration.. What are you looking at so I can see what you mean? and besides balancing props how do you get rid of that?
        
        Sorry I'm a newb!
        
        Andy Piper > WR May 6, 2015 at 4:31am
        
        http://copter.ardupilot.com/wiki/ac_measuringvibration/
        
        WR > Andy Piper May 6, 2015 at 4:36am
        
        ya I read all that.. still don't know how to fix it
        
        Mark Slater > WR May 6, 2015 at 9:52am
        
        Balance your props should improve that greatly