LV_Forestry
First Officer
Flight distance : 4726654 ft
Latvia
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Labroides Posted at 3-11 23:14
It's a fact, the Mavic 2 systematically requests a calibration of the compass after each trip greater than 50km.
Yes, it did ... and there was absolutely no physical reason for it to.
It was just DJI hanging on to the misinformation that had put in their manuals for years.
The fact is also that I agree with you regarding the compass.
It's just that the Mavic 2, P4M, Ardupilot, Pixhawk that I use continually require this calibration. That's all.
I think it's not misinformation, it's a question of technology and algorithms.
For a project to guide an autonomous forestry machine I used a good old compass at the beginning. The problem is that from one end of the country to the other it did not show the same North, I am not going to redo the development on the magnetic declination...
Then I moved on to a solution calculated on the basis of the indications of the GNSS receiver (antenna only), Azimuth between coordinates A and Coordinates B when the wheels are straight. This solved the problem of magnetic North but with GNSS precision it also brought defects.
Then I coupled them to an IMU to discard the GPS faults, (the Mathlab link previously posted), this is very probably what DJI is doing in these new drones.
And finally I upgraded to Full GNSS with dual receiver. The distance between the two antennas being known. one is the base, the other the rover. With this the geographical heading is ultimate and almost instantaneous. And it works everywhere.
simpleRTK2B Heading - Basic Starter Kit (ZED-F9P) - ArduSimple
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