Hello,
Just an update so I thought I would extend this thread for others
following. I was able to power all servos from the BEC. Only the PPM
wire from the autopilot goes to the servos. Ground and power to the
servos comes from the BEC now.
So, I was able to fly. However, during sustained turns the autopilot
commanded a sharp roll which I was able to recover from. It is
consistently doing it. Also if the autopilot starts level it tends to
stay level. However if you engage AUTO2 while the aircraft is not level
it does not recover well (or at all).
I realized after viewing this video:
http://www.youtube.com/watch?v=H1rGYIDLKIE&list=ULKKPsIyq1E8Q&playnext=1
that I am using something different. That video was using the 6DOF razor
which is just a sensor board. So the DCM code must be running on the
autopilot in this case. In my case with the ArduIMU the attitude
information comes from the ArduIMU. So if it's incorrect the autopilot
is unaware.
Chris from DIY drones seems surprised at this behavior and claims
hundreds are flying with this IMU and the latest IMU running the same
code. I'm not sure how it's possible but believe him.
Did I miss something? I have a video showing the attitude information is
correct on the ground. However in flight it simply is failing to
stabilize my little Merlin aircraft. I am hoping maybe there is a tuning
parameter I am missing someone can share with me to correct.
I have not flown in weeks so I hope to get some new data soon. However
my questions are:
1. Am I supposed to be tuning the IMU somehow? If so how?
2. The only video of a working example is not using an AHRS. Has anyone
a video or proof of a Tiny+ArduIMU flying? Logs that can be replayed?
Anything? I heard of a FunJet...can they share some more info to back up
the claim and help me get flying. I have a FunJet BTW as well setup to
go but don't dare try if the Merlin won't fly.
Regards,
-David
On Nov 7, 2010, at 4:12 PM, David Conger wrote:
Well, all is on hold. The plane flew well in manual but I found the
3-pos switch was not working. It stayed in manual unless I turned off
the radio. I am using a T7CAP Tx and the same files that worked
previously so this is a mystery.
-David
On Nov 7, 2010, at 8:33 AM, Martin Mueller wrote: