Gender
Male
About
Location
Fort Worth, TX
About Me:
Aerospace Engineer with 27 or so years experience in aerodynamics and flight control.
Please tell us a bit about your UAV interest
I've been in RC for years, interested in autonomous flight DIY.
Hometown:
DFW
Activity Feed
"Link
Paul, I don't really want to hijack the thread too much but you might want to look at the link above. I did end up using FG for my HIL simulations. With new versions of the code the SIL route might be best since you get better SW coverage. …"
Paul, I don't really want to hijack the thread too much but you might want to look at the link above. I did end up using FG for my HIL simulations. With new versions of the code the SIL route might be best since you get better SW coverage. …"
"Andrew, I'm looking forward to 2.76 for the reasons you mentioned. The current code writes a bunch of multi-rate data to an external SD card by way of UART2 and slows the fast loop to 38 Hz. This is just barely enough but does work for HIL, UAV…"
"Thanks for the kind words guys. Over the next few weeks I'll post my mods to the stock Arduplane code. Actually the roll rate feedback issue that resulted in the initial dive is fixed in 2.76. The vehicle wanders about after controlled flight…"
"Bravo to Andrew and the team on the DCM fix.
I'm positive that you've found the issue that eventually caused my 1st high alttiude return attempt (NTNS-2) to lose attitude reference (Link). This flight experienced 2-3 Hz oscillations due in part…"
I'm positive that you've found the issue that eventually caused my 1st high alttiude return attempt (NTNS-2) to lose attitude reference (Link). This flight experienced 2-3 Hz oscillations due in part…"
"Great write-up; and complete with a fix! I found that all 3 of my probes leaked somewhat. This one thing that may have contributed to measuring only about 1/2 of the dynamic pressure on my North Texas Near Space 2 flight. My fix was a little…"
"On my last flight we pulled the sound track from the HD camera into Matlab and did a PSD. There are likely free tools to do this. Visible were the 1st and likely the second wing bending modes as well as the pitch oscillations that the plane was…"
"There are several blogs and forum posts on this site dedicated to this topic. I'll likely be ready to fly again in a month. I got pretty far for a 1st attempt but had 4-5 issues, most of which are explained in the post flight charts. The end result…"
I'll preface by saying that I'm not a C++ developer. There are multiple references to APM2/2.5 support for UART2 on the forum. Most references don't seem to come to conclusion. I think we have quite a bit of flexibility on how to utilize the HW…
"Update: I found a pinhole in the pitot dynamic proble. This could be crash damage, a manufacturing defect, or an assembly issue. Potenially significant to others is that I have tested both my DIYdrones AS probes and they both leak from the dynamic…"
"This thread is really mostly about the data. Not necessary, but completed was a range safety analysis that showed < 1X10-7 probabilities of a major issue with aircraft. I haven't done the work but I believe it much more likely to hit a buzzard on…"
"The folowing link has video frame by frame from apogee + several other key frames where the autopilot was performing well. The orginal video was not completely recovered and video editing SW has some difficulty with frame count. This could be and…"
"Thanks Carl. The A/F was at angle of attack and pulling about 4G in the spin... which gets erratic and looks like a departure stall. We'll see where this goes.
Mostly what I would have wanted was near zero tip-off. Of course we got a bunch as…"
Mostly what I would have wanted was near zero tip-off. Of course we got a bunch as…"
"I read Carl's post and he mentioned departure stall (can't find this on this thread but don't know why). The Stinger will depart, but it takes an aft CG or really slowing it down. That doesn't mean that this isn't occuring (not sure the exact…"
"The plane was about 20 ft from a 3 ft chute, attached to the balloon. These were components left over from my unguided APM ride along. You can see a picture or two by watching that video.
I started out trying to work with the APM climb_rate code…"
I started out trying to work with the APM climb_rate code…"
"Thanks for posting link to the paper.
This morning I'm working a bit on video analysis. The 1st tasks are to time tag critical frames, determine roll rate time history during descent. I think the atttiude initial condition is solvable by looking…"
This morning I'm working a bit on video analysis. The 1st tasks are to time tag critical frames, determine roll rate time history during descent. I think the atttiude initial condition is solvable by looking…"
