mgrosvold
lvl.2
Flight distance : 841929 ft
United States
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QuadKid Posted at 2018-3-13 02:44
DJI drones do not measure actual wind speed, they use accelerometer's to measure the force of the wind relative to the drones flight controller preset telemetry. The hover and stability of the drone is based on input from the GPS/GLONASS & Compass systems to maintain a single position in the sky, so when the wind effects the Flight controller wanting to move the drone the accelerometers counter that with autonomous input or commands from the RC to the FC to maintain stable position & attitude.
This is why many/most drones are lost when GPS/Compass signals are interrupted or lost completely resulting the FC to enter "Atti" mode which is complete manual manipulation using the RC and skill to maneuver.
Thanks for reading and taking the time to respond to my post. You, in more techospeak and with more eloquence, restated precisely what I was getting at in my original post:
In order to hold a hover it must calculate how to counter the forces acting upon it. Therefore, it must know the wind's relative direction and its force.
I didn't say that it measured wind speed. I was trying to say that it should be able to figure it out. Again, my thinking is that in order to hold position in a hover, it calculates the counter force needed to negate the force of the wind pushing against it. I would think that from that calculation wind speed and direction could be extrapolated and displayed.
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