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Tricopter slow yaw oscillation

Posted by Glenn M on May 31, 2012 at 5:31pm

Over the last couple of flights I've been getting a reasonably small, but significant oscillation of my yaw when no stick input is provided. It yaws for about a second in either direction. If I input a slight amount of yaw using the stick, it will stop it, but it will return when I release the stick.

What could cause this? It's the wavy lines... Log is also attached.

i-CCdD4qv-L.jpg

And zoomed in on the first section:

i-RmnHwmX-L.jpg

2012-06-01 09-45 225.log

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Replies

  • Glenn M November 2, 2012 at 2:49pm
    Sorry I don't have access to anything at the moment, but I can tell you it wasn't PID related. The problem was the servo I was using at the time was too slow (BMS-385dmax - 0.15s if I recall). I replaced it with a faster servo (D-MG16 - 0.08s) and never had any more problems with yaw oscillation.
  • Jose Manuel GVall November 2, 2012 at 2:46pm
    Hi Glenn,

    I'm getting the same issue in my tricopter with 2.7.1. What version are to using? Could you post your PID settings?

    Regards
    Jose Manuel
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