UAVDevBoard users:

Team,

I have recently performed flight tests on a major change in the way acceleration is accounted for in performing roll-pitch drift compensation from accelerometer measurements. The theory behind the idea was recently published in a…

Team,

Presently I am doing work on multicopter modeling and control. One topic of interest to me is how can the tilt dynamic model of a multicopter be accurately determined from flight data, without disabling the controls or injecting any sort of intrusive signals. It turns out it can be done from normal flight…

Team,

The above picture shows an interesting side effect of magnetometer misalignment: complete reversal of the measured horizontal component of the earth's magnetic field.

The effect was discovered by Peter Hollands during his analysis of the data from one of Ric Kuebler's flights. Ric was using the…

The above is a plot of the 3 components of estimated magnetometer offsets computed during spin tests at 78 RPM of an improved method for estimating and removing magnetometer offsets. There is a report available with…

Team,

After experimenting with several dead-reckoning algorithms over the past 2 years, I finally have a simple…

There is a simple control technique to get good altitude control during autonomous landings. Turn off the throttle and follow a glide path defined by 2 waypoints. The first point is the approach point, and should be about 10 meters above the beginning of the runway. The second point defines the glide path, and should have a negative height, and be unreachable.

Whenever the plane is above…

Hi guys,

Today MatrixPilot controlled three more autonomous flights. All three flights were executed with the transmitter turned off. The picture above is the track of the first landing. It was aiming for the midpoint between the two fields, along a line that connects the centers of those two circles.

Recently I posted three flights of my GentleLady flying…

Yesterday, my GentleLady sailplane, under the guidance of MatrixPilot running on a UAV Devboard with an EM406 GPS and Jordi's magnetometer, achieved 3 consecutive autonomous flights, with the transmitter off most of the time. The above picture shows the tracks of the three landings. Waypoints 18 and 19 were arranged so that the plane was supposed to land halfway between them. The…

UAV DevBoard pilots:

SparkFun is out of stock for both their Olimex ICD2s, which is what I've been recommending to program the UAV DevBoard, as well as their Olimex PICPOCKET, which I do not have enough information right now to provide any recommendations one way or another. SparkFun is discontinuing the ICD2, it is their intent to sell the PICPOCKET instead. Those are out of stock right now.…