log analysis

Hi

I've just signed up in the forum in the hope that someone will assist me with looking at the datalog of my last fatal flight! my quad has been flying nicely for a while now. I recently upgraded to 3.1 RC5, the first few flights seems rock solid, but suddenly today the quad pitch forward 90% while it was in a stable hover and flew off in the distance and crashed. I tried pulling back pitch but there was no response. I suspect the front right esc failed, but the quad didn't roll at all, just a perfect forward pitch.

I have attached the datalog, I would really appreciate a little help with analyzing.

Thanks

Shane

2013-10-29%2020-04%2021.log

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  • I quickly looked at your log. I'm not expert, but found:

    -You had GPS Failsafe and Fence enabled

    -From log i can see you had one gps glitch error # 11 in 709 and multiple Fence Failsafe # 9 between 712-811

    Bad gps data [# of SATS and bad HDOP] and your APM failsafe settings lead to RTL--->LOITER and finally LAND mode.

    Codes are looked from Defines.h

    // Error message sub systems and error codes
    #define ERROR_SUBSYSTEM_MAIN 1
    #define ERROR_SUBSYSTEM_RADIO 2
    #define ERROR_SUBSYSTEM_COMPASS 3
    #define ERROR_SUBSYSTEM_OPTFLOW 4
    #define ERROR_SUBSYSTEM_FAILSAFE_RADIO 5
    #define ERROR_SUBSYSTEM_FAILSAFE_BATT 6
    #define ERROR_SUBSYSTEM_FAILSAFE_GPS 7
    #define ERROR_SUBSYSTEM_FAILSAFE_GCS 8
    #define ERROR_SUBSYSTEM_FAILSAFE_FENCE 9
    #define ERROR_SUBSYSTEM_FLIGHT_MODE 10
    #define ERROR_SUBSYSTEM_GPS 11

    // general error codes
    #define ERROR_CODE_ERROR_RESOLVED 0
    #define ERROR_CODE_FAILED_TO_INITIALISE 1

    // subsystem specific error codes -- radio
    #define ERROR_CODE_RADIO_LATE_FRAME   2


    // subsystem specific error codes -- failsafe_thr, batt, gps
    #define ERROR_CODE_FAILSAFE_RESOLVED 0
    #define ERROR_CODE_FAILSAFE_OCCURRED 1

    // subsystem specific error codes -- compass
    #define ERROR_CODE_COMPASS_FAILED_TO_READ 2

    // subsystem specific error codes -- gps
    #define ERROR_CODE_GPS_GLITCH 2

    // subsystem specific error codes -- main
    #define ERROR_CODE_INS_DELAY 1

    3692870808?profile=original

    Regards Jani

  • I had the same I thing occur on the bench and in real flight which resulted in a crash
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