djiuser_Kf4iPA3
lvl.4
Flight distance : 510968 ft
Israel
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Charles Adams Posted at 2017-10-1 08:58
The only way to perform this test is as Hallmark suggested, taping a magnet on to disrupt the compass. I'm not that ambitious. But it does remind me of a movie quote that I'll alter slightly:
"All I ask for is a frikkin drone with laser beams!"
First order of business, in my opinion, is the GPS. ATTI mode means that both GPS and vision are not working or their data is not being read.
If GPS data still exists but gets thrown away when it contradicts the compass, then the algorithm should be fixed. GPS is typically much more reliable than a compass, and a moving AC can identify its orientation based on the change in coordinates. If you're looking for a fail-safe arrangement, that's the ultimate one.
If GPS gets lost and does not get re-acquired, even after the AC has moved, then something is extremely questionable with the performance of the GPS itself, or with its driver in the AC's formware, or with its electromagnetic shielding. Think about it - any low-end smartphone nowadays can acquire and maintain GPS reception, or reacquire it when it gets momentarily lost - and that's in much tougher conditions: at ground level, typically near many more sources of magnetic interference, and seeing a smaller portion of the sky (hence, fewer satellites) than a drone in mid-air.
For me, that's the part that needs to be looked at first, because it doesn't add up. |
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