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4hv.org :: Forums :: General Science and Electronics
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CSU Chico Tilt Rotor Flying Machine, (Airframe and Electronics, 2 of 3).

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Patrick
Wed Jul 04 2012, 02:21AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
AndrewM wrote ...

I propose a boycott of all of Patrick's threads until he posts video.
ok ok ill post one tomorrow for sure, my fiberglass landing skid is a little weak at the moment though.



As for Steve Connor's point, highly educated idiots F things up all the time... those NASA idiots blew up 2 space shuttles killing 14 with nothing more than their own incompetence.

Id rather have competent people without degrees, than incompetent idoits with degrees. Especially if im the one sitting on 800 tons of ammonium perchlorate.
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Patrick
Thu Jul 05 2012, 11:39PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
OK video on the way!!!

EDIT: im in the middle of a california forest and my cell-interent connection isnt worth a dam atm. sorry.

heres a more primative tilt rotor with 3 motors... Link2

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AndrewM
Fri Jul 06 2012, 06:05AM
AndrewM Registered Member #49 Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
You disappoint me. :(
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Steve Conner
Fri Jul 06 2012, 01:46PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
The Panther looks cool, however I'm disappointed that the rear rotor doesn't tilt backwards and act as a third propeller when transitioning to flight. :( Maybe they decided that it wasn't worth the extra complexity, but it would have looked neat.

Did I mention, we want video! >____>;

I also think it is a tad unfair that so-called grown-ups get to spend defence money on building RC planes and playing with them.
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Patrick
Fri Jul 06 2012, 11:06PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
it looks like they turn it off when they dont need it, thats why i said its more primative then mine or any true tilt rotor. they effectivley have a tri rotor some of the time, then dead wieght the rest of the time... every ounce of dead whiegt means an ounce of battery, fuel, bullets or High explosives not carried to the battlefield. cool idea but still primative.
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Patrick
Mon Jul 09 2012, 07:37PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Video!



fast forward to 3:25 to see it really fly.

eventually i get it to fly, break a prop and most of the other good flying happens off camera. But this isthe best i have.

its too unstable with just 3 gyros, it really needs 3 accelerometers, even my ace test pilot Corey Kohler is pressed to the limit to keep it in a hover.
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AndrewM
Mon Jul 09 2012, 10:02PM
AndrewM Registered Member #49 Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
Yay video thanks!!

That rod is doing you zero good if its not fastened on tightly. Also from the looks of things you need a rod or something stabilizing the pitch direction too.
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Patrick
Mon Jul 09 2012, 10:06PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
AndrewM wrote ...

Yay video thanks!!

That rod is doing you zero good if its not fastened on tightly. Also from the looks of things you need a rod or something stabilizing the pitch direction too.
yep before i had the GoPro cam, i did have two good sticks on there and the fastend better, it did make a differecne.

really, the sticks help stability, yet there best purpose is saving props.

EDIT 5:10pm : ive solved the roll oscillation again, by readjusting the roll pot with two better sticks attached. Then crashed it in real bad, striped the titanium gears again. dam it.


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Patrick
Tue Jul 10 2012, 04:31PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
ok ive been folowing the explanations from these two sites:

Link2 PID in C code for position.

Link2 math and reasoning behind both velocity and position PIDs.

which parts in the below pic are the P the I and the D ?

1341937897 2431 FT136218 Image320
im thinking the first part up to the + sign is the P, then the I and last the D, and is that "K sub 0" or "K sub i"?


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Ken M.
Tue Jul 10 2012, 04:51PM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
ATM I can't find it but I know In a previous version of Aeroquad had the arduino code for a PID loop but heres a Link to the repository. Link2
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