NEX5 brushless gimbal on X8 arducopter - Summer Flight in France : episode 2

I have made a test of a NEX5 brushless gimbal used on my X8 Arducopter platform.

The video is raw and has not been post-processed.

 

For the more technical among you:

-Arducopter APM2.5 platform, firmware V3.0.1

-2-axis (tilt/roll) Brushless gimbal for Sony NEX5 from altigator.com (it is in fact a (re)labeled RC timer aluminium gimbal), using white labeled GBM5010 brushless motors (150 turns, able to hold 500gr cameras) 

-Sony NEX5R with 16-50mm objective. This big sensor compact camera delivers 50 frames/sec video and 16 mios pixels pictures. It can be radio remote controlled through APM and a IR trigger (i used stratosnapper)

It is a second episode of the X8 series of Summer Flights in France and will soon be continued with a third...

Views: 2872


3D Robotics
Comment by John C. on August 20, 2013 at 3:50pm

Dang, that's some smooth video there Hugues.  Looks like just a bit of yaw rebound, but I want to see some more!

Comment by John Githens on August 20, 2013 at 4:23pm

Sweet.


Distributor
Comment by AKRCGUY on August 20, 2013 at 7:30pm

Very nice!  Nice property too.

Comment by Dave Wicks on August 20, 2013 at 7:44pm
Nicely done! The location, camera work and gimbal performance was very impressive!
Comment by Hugues on August 20, 2013 at 10:53pm
Thx for your comments.
There is indeed some room for improvement on the yaw axis. Ideally a third brushless yaw axis would be perfect but did not find a cheap enough gimbal to do this for a NEX size camera, yet.

3D Robotics
Comment by Brandon Basso on August 21, 2013 at 10:25am

Wow, you certainly have a nice airfield!  I didn't notice too many problems with your yaw axis from the video. Maybe it could be a bit more damped if you think it's overshooting too much; what is your Yaw D gain?  D essentially adds damping, so if you are overshooting it can help, at slight expense of yaw slew rate--ie. how quickly you can get to your desired yaw.  Increase RATE_YAW_D in increments of 0.01 and try some pure yaw maneuvers and see if you're happy with the performance.  As you increase this gain you should see yaw become less aggressive, but at a certain point, D will make it unstable, causing rapid oscillations.  Hope that helps!

Comment by Hugues on August 21, 2013 at 11:33am
Thx a lot Brandon for the advice, i will try this
Comment by The Sun on August 21, 2013 at 8:29pm

http://youtu.be/rB6jhShYRIk

The third axis always looks painfully unstable in 2 axis setups. Here is a clip from my 2 axis gimbal on my AV quad - you can REALLY tell the third axis is NOT stable.

Your video looks good - and your field is 10/10.

Comment by The Sun on August 21, 2013 at 8:30pm

Embedded version. Feel free to delete it if it is taking up too much space.

Comment by Ioan Ghip on August 21, 2013 at 9:33pm

What a nice house.... 

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