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. …"
"Max,
I was hoping someone else would respond since I'm not sure I did things right. But, it worked. In v 2.65 I followed suit in sensors.pde, modeled after the way the voltage pins are handled. Then I had to extend the max_pin_sources in…"
I was hoping someone else would respond since I'm not sure I did things right. But, it worked. In v 2.65 I followed suit in sensors.pde, modeled after the way the voltage pins are handled. Then I had to extend the max_pin_sources in…"
"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…"
"This is fairly easy, but you will have to do some modifications to software to accomplish what you want. The standard controller doesn't actually use the rate process variable but uses a standard PID. The guys can correct me if I'm wrong here. …"
"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 pretty good discussions on the v2.67 thread that are relevant. One part discusses airspeed control and that the code isn't really flexible enough now to handle gliders. My observation here is that there's a flag in defines.h that…"
"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…"
"Tom, I don't think so. What you have to do depends on your objective here. The wiki explains how to route serial3 to UART2. This tales a mod to APM_config.h and subsequent compilation.
#define TELEMETRY_UART2 ENABLED // solder bridge changed to…"
#define TELEMETRY_UART2 ENABLED // solder bridge changed to…"
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…
"Tony, I'm also interested in this topic for gyros as well. Part of my issues on the last high altitude flight were associated with gyro saturation and loss of the attitude matrix. So, this is on the todo list. Keep me up with what you find out…"
"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…"
