Discussions

AutoTune stops after first Roll twiches

Posted by Andy on July 9, 2014 at 1:31am

Hy

Currently I use a QAV400 with 1100kv motors, 8x5 props on 4s with AC3.1.5.

Had several successful AutoTune steps with the other Copter I got.

I put the QAV400 into AltHold and the Autotune it stated twitching left right and so on but then suddenly stopped. I had to land disarm and rearm the copter to start again but with the same result....

Whats wrong did it reach max or min PID values?

Attached the log file of the flight.

Andy

2014-07-09 10-02-02.log

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Tags: ac315, autotunestop
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Replies

  • Mathias July 11, 2014 at 3:15pm

    My autotune always run the roll-autotune routine and when it's time for the pitch-tuning routine nothing happens it just holds the altitude? I have a fairly big copter, T960, ~6kg. Wonder why it stops, any thoughts?

  • Developer
    Marco Robustini July 10, 2014 at 11:51am

    I check your parameters,  there's strange RATE value, please try again with this one and check if Autotune work fine:

    RATE_RLL_P, 0.140
    RATE_RLL_I, 0.160
    RATE_PIT_P, 0.140
    RATE_PIT_I, 0.160
    STB_RLL_P, 5.0
    STB_PIT_P, 5.0

    • Andy > Marco Robustini July 10, 2014 at 11:55am

      ??? I can't find those values, they are more like 0.05999997. Did you check the right log file?

      • Developer
        Marco Robustini > Andy July 10, 2014 at 1:53pm

        Yes, i check your log, there's inside this parameters:

        PARM, RATE_RLL_P, 0.05999997
        PARM, RATE_RLL_I, 0.05999997
        PARM, RATE_PIT_P, 0.24
        PARM, RATE_PIT_I, 0.24
        PARM, STB_RLL_P, 6.84375
        PARM, STB_PIT_P, 6.84375

        First you must replace this one with the other in my previous post, then retry Autotune.

        • Andy > Marco Robustini July 10, 2014 at 1:55pm

          when I do check the file I find:

          PARM, RATE_RLL_P, 0.05999997
          PARM, RATE_RLL_I, 0.05999997
          PARM, RATE_RLL_D, 0.0035

          PARM, STB_RLL_P, 6.84375

          PARM, STB_PIT_P, 6.84375

          Andy

          • hector hind > Andy July 11, 2014 at 2:15am

            Hey Andy i think your getting confused mate

            Marco is asking you to go to the CONFIG/TUNING tab in Mission Planner and change the values for RATE_RLL_P,RATE_RLL_I,ect to the ones he posted first and retry to auto-tune.

            • Andy > hector hind July 11, 2014 at 2:24am

              oops sorry for that you're right. Sorry I will try it with those values! thx man

              Andy

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