Hi Guys,

Today i was testing my pixhawk on a quad copter with 3.2.1 firmware. I had sent it in autonomous mission. It crashed while returning from the mission around 2.5 km away. I saw the data flash logs but couldn't conclude anything. So please help me out in finding out the possible cause for the crash. I have uploaded the log file also with this post.

I had similar crashes with APM on board with the same firmware some time back. Please help me in finding out the cause for the Crash.

10.BIN

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Replies

  • It looks like some kind of short. I can see from the logs that the current spiked to more than double the average from the flight at which point it drops down to nearly nothing.  Maybe one of the ESC's locked up.  There were several radio failures detected as well.

  • Log File C:/Users/Mark/AppData/Local/Temp/tmpD765.tmp.log
    Size (kb) 9348.0400390625
    No of lines 125632
    Duration 0:08:52
    Vehicletype ArduCopter
    Firmware Version V3.2.1
    Firmware Hash 36b405fb
    Hardware Type
    Free Mem 0
    Skipped Lines 0

    Test: Autotune = NA -
    Test: Balance/Twist = NA -
    Test: Brownout = GOOD -
    Test: Compass = FAIL - Large change in mag_field (132.07%)
    Max mag field length (581.55) > recommended (550.00)

    Test: Dupe Log Data = GOOD -
    Test: Empty = GOOD -
    Test: Event/Failsafe = FAIL - ERRs found: CRASH FS_THR
    Test: GPS = GOOD -
    Test: IMU Mismatch = FAIL - Check vibration or accelerometer calibration. (Mismatch: 5.30, WARN: 0.75, FAIL: 1.50)
    Test: Parameters = GOOD -
    Test: PM = NA -
    Test: Pitch/Roll = NA -
    Test: Thrust = NA -
    Test: VCC = GOOD -

    You need to recalibrate your compass and/or run compassmot.  That compass offset is not good.

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