Passive thrust vectoring with anti vibration mounts.

 

 Have constructed an enclosed ‘H’ frame carbon/Kevlar quad with soft mount front and rear arms for vibration reduction. Initially yaw was awful as the arms tilted in the wrong direction and opposed any motor torque so I had to stiffen the mounts to prevent yaw reversal. Now I have reversed the motors in the code and the tilt actually helps the yaw. The mounts on the video are very soft, just to help demonstrate the movement but I think they were bottoming out.

Am quite pleased with the lack of vibration showing on the camera.

Apart from the motor reverse all parameters are completely stock. Will tweak them when I get some time.

 

Vince

Views: 3730


Developer
Comment by leonardthall on January 30, 2013 at 5:01am

Cool, I am interested to see the result.

I was thinking of doing a full fuselage using some of the techniques we use to build high performance gliders. I was thinking of having a removable nose cone so that a tray can slide down the middle. It will be a while before I can put it into action though.

Thanks for sharing!!!


Developer
Comment by Max Levine on January 30, 2013 at 6:13am

Looking good !!! 

What motors and props ?

Comment by Vince Hogg on January 30, 2013 at 6:32am

Max, some info on my motor setup, good and bad.

http://diydrones.com/forum/topics/530kv-4008-motors-with-large-prop...

 

Comment by Vince Hogg on January 30, 2013 at 12:26pm

One other advantage of this frame is there is a front and back. I dont know how guys keep orientation on an x frame at distance. Guess I’m old fashioned but I feel a lot more confident with it, just like an RC heli.
Leonard, Im thinking of a foam cored carbon ‘plank’, lowered in the middle like (side profile) ----____---- Then a non structural carbon shell. I didn’t like the lack of access to the end sections. The soft mounts would be up the other way so if one lets go it would bottom out on the frame.

Comment by Emery c. Chandler on January 30, 2013 at 2:11pm

very cool!


Developer
Comment by leonardthall on January 30, 2013 at 2:31pm

I completely agree with the orientation thing!

I like the foam cored idea too. I need to put together my CNC machine before I can build my molds. I have been distracted by the control loops for arducopter :)

Comment by Vince Hogg on January 30, 2013 at 2:53pm

CNC machine. My next job too. Will have interchangeable head so it will 3D print.

Comment by Vince Hogg on January 30, 2013 at 2:54pm

Hows that.

Comment by Vince Hogg on January 30, 2013 at 2:58pm

Rate P now up to .23 no wobbles

Comment by Vince Hogg on February 3, 2013 at 3:19pm

Soon be cutting cloth for MkII

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