well today just wasn't my day.
I wanted to video some today of a lake near here that is soon to be refilled after the dam was replaced for the 2nd time. I preflighted my IRIS+ and even flew it around the yard some, it operated flawlessly. so i got ready and went to the lake. I put in my battery, waited for the IRIS+ to give the green light.
i took off, flew around the perimeter of the lake some, and then headed offshore ( no water yet, just the streams ) i get about half way over the lake and suddenly the drone looses total control wobbled around violently, fell and crashed upside down. badly damaged.
What could have caused it to suddenly go out of control.. someone please help..
the flight lasted less than 1 min.. i was in loiter mode. full charged batteries.
i'll post logs on here...
Replies
is there anything i can do next time to try to recover before crash ? ( change a fly mode or is there a manual mode ? )
i fly mostly loiter, and sometimes stabilize. only 2 modes available that i know of on the IRIS+ (Pixhawk system )
does any one know what may have caused my crash ? i was at home and it flew great, then i took it across town to fly.
could that have caused any calibrations to go out ? i wouldn't think so..
I don't thik it's a PID config issue too.
Ray said:
i tried the latest FW earlier , few weeks ago, but it would not take,,it would show BAD BRD TYPE .. i was unable to correct, so i reverted back to my old version of FW,, and i recalibrated everything as well.
i flew the drone earlier at the house for over 10 min and it flew just fine as always.. i don't think i had a PID issue..
my drone is a IRIS+ FW v3.5.4
I don't think you can prevent that. You don't know what generate this malfunction.
You have to do an accelerometer calibration to see if they are working normally.
Maybe you have to load the last firmware update.
You should also watch some videos on youtube on how to set the PIDs of your drone properly. Then the drone shold not oscillate in the air. Pixhawk should work.
what is wooow instability ? - the unit oscillated as it went down.. there was none before hand, i keep my props in exc. condition and very balanced. i use a prop balancer, and i also spin then on a motor at different speeds..
Greg Fletcher said:
what could have caused this and what can i do to prevent it from happening again ?
Mauricio García said:
Hi.
It's not needed to use google earth.
Mission planner on his Log analyzer can show the map and the drone trajectory side by side with the graph of the parameter you selected.
Then, double click on the graph on any point and it show the exact position of the aircraft. It's very useful.
Your drone indeed was not flying much. In the morning I viewed the trajectory of your flight in google earth.
log.PNG
looks like it just got some bad oscillation. Maybe was riding on the edge for some time then'''' wooow instability. That's what I see.
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