Posiable switch for acro mode

Posted by Monroe Lee King Jr on June 7, 2013 at 4:47pm

I was watching Leonard's discussion at Drone Con #1 and I was wondering if it would be possible to use a manual momentary switch on a separate channel perhaps 2 to invert the data in the APM to do flips and rolls? I think with practice you could get good at that! Do snap rolls and flips?

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Replies

  • dr0n3droid June 8, 2013 at 6:19am
    Personally, I can't wait to have the ability to fly inverted, full 3d flight. Waiting for VPQ(Variable Pitch Quad).

    Then the fun really begins.

    Autonomous flips are an awesome idea. Something we can all enjoy. But I love pushing my quad to it's limits. As Bob said, "There's missions, and then there's fun.
  • Bob Doiron June 7, 2013 at 8:34pm
    Because I have one brain in my copter, with multiple flight modes. There's missions, and then there's fun!
  • Rob Bartlett June 7, 2013 at 8:31pm

    Hello,

    I'm a noob.  Totally starting out with APM and RC in general.  But I have to ask, given that the whole idea is based on a "DIY Drones" website, why in tarnation are you trying to make the thing do flips?  I mean, I thought the whole idea was to autonomously fly around and perform essential missions like taking GoPro pics of the bikinis next door, or to fly out of sight and crash into a lake or something. 

    If flips are the thing, why not a tricopter with a KK2?  Just wondering.  Like I said, I'm a noob

  • Bob Doiron June 7, 2013 at 5:25pm
    I've been messing around with acro mode...trying to do rolls and such, manually. I have to say, arducopter isn't very good at this. The choices are earth frame stabilized acro or unstable body frame acro. Earth framed is easy to control, but you don't have true acro control - the yaw axis, for example, always points to earth making pivoting the copter about the thrust plane tricky to nearly impossible. The code actually prevents forward and backward flips since the gimbal reference will pass through a singularity (lock so to speak). The frame reference mode is straight rate control, so any disturbance will throw off the copter. The rate integrator will try to hold the desired angle, but not with any authority.

    What I plan to do is add a special outer loop to the frame mode that will help hold angles. Basically a gyro only angular integrator, perhaps bleeding if the gyro drift is passed up, that feeds the rate controller. That should bypass the gimbal lock problem and make the controls more 'driver seat' oriented.

    With that in place, automated flips, in any direction, should be pretty straight forward - just need to work out the throttle control.
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