Hi,
I have recently set up a Pixhawk on a quad and the second time around a waypoint mission wanted to bring it down early in case the battery was close to being low. Just as I was switching to STABILISE mode it lost altitude and despite giving a full throttle command it continued to fall.
Fortunately it came through a tiny gap in the tree canopy and landed upright and seemed fine.
I'm inexperienced with analysing logs and wanted to ask for your help. Is there also somewhere I can go to and learn what I should be looking for after a crash to find out what caused it?
I wonder if the battery was too low to continue powering the quad but it flew for a longer time on the same battery previously.
Any help on this would be much appreciated. I've attached the .log and .bin and KMZ file so hopefully this is all that's needed.
Thanks, Tom
Replies
Thanks everyone for the replies, that's really useful!
Thanks, Tom
3 minutes into the flight Pixhawk threw an EKF Check-2 error
http://ardupilot.org/copter/docs/ekf-inav-failsafe.html
There was no battery or current data in the log.
Add that to the fact that you have no idea as to how your power system is performing you are very lucky the aircraft didn't crash sooner.
Do yourself HUGE favor: Install a Power Module and setup the Low Battery Failsafe.
There is more, but this should get you started.
You can also find info here: Pixhawk on RC Groups
I think he is also asking for some help on reading and analysing the logs. Information on how to graph the log files is difficult to find and understand. I for one would like to find some information how to use the log graphs!