"In the sim everything works well :)
however I'm now buried up to my eyes in the group efforts to improve some of the support libraries which are critical for providing accurate sensing. Of course in the sim we have perfect information. I hope to get…"

"I would like to drop in a comment about the need for wind estimation in or around DCM.

I believe the original design of DCM was to *let the wind yaw the matrix*, in this way the UAV began to compensate for the wind, and could still navigate. How…"

"I'm not saying you can't do landing and takeoff and control, at 10hz, and the "something reasonable" I agree you can do: it was my last scenario: just start pitching up at 1m AGL and pray, with some escapes for unexpected events.
I just believe that…"

"A textbook flare is very difficult especially combined with a defined touch down point. You need to change from nose down trimmed condition in a glideslope at a pre-calculated height over ground that coincides with the right distance prior to the…"

"The git clone is available

http://code.google.com/r/justinbeech-navi/source/browse/ArduPlane/?...

As it stands it is setup to build HIL firmware, or JSBSim SITL desktop version (from autotest)

To build actual flying firmware for APM2 (which I do…"

"UPDATE: Here are a couple of firmware images
one for APM2 hardware and also the Oilpan
the other for APM1

I'm working on my git clone, so anyone wanting SITL or actually to fly this firmware for real has to wait for that to be up

Anyway here are…"

"here is a video of the Bixler X-plane model, which cruises very slowly, in wind with turbulence as well. There is no setting in X-plane for wind from a constantly changing direction but its turbulence setting causes variable wind as well as gusts up…"

"I don't want to release an image, only to update it 60 minutes later with an improvement. For example later today I'll get the bixler x-plane model I'd like to test it against that.

Hopefully in the next two days I'll post either the firmware…"

"wow sorry mangle city. I really don't like the ning comment system :(

The effect of this parameter shows up best in loiters where too much gain and the plane loiters inside the circle, too little and it loiters outside the circle. If it is roughly…"

"(contd) ..  rather than lagging a moving target. The effect of this parameter shows up best in loiters: the plant is not being led enough) or loiter inside the circle (it is being led too much). If it is roughly right, t_mode_control does the…"

"A few answers.Regarding wind variability. Since this firmware does not guess the wind and then output a fixed compensation it does not matter if the wind is variable. GPS is providing the position 4 to 10 times a second so the reactions to the…"

"For SITL tests right now all I have is an OSX .elf, so unless you are on Mac I can't post that.
I'll post an APM1 and APM2 .hex file shortly, then upload the code so anyone can pull it down and build it."

"The sharp eyed may notice there was no track following between waypoints 6 and 7
this was not because of wind or anything, but because there was a speed change command between waypoint 6 and 7 this the navigator did not have a "from" bearing on its…"

"On the left is the Arduplane default, the heading hold is done with nose-to-bearing, so it is not accounting for wind. (Not that in this test there was any wind). In addition the heading hold is mixed with cross-track gain to try to get the plane…"