Hi everyone,
So glad to be here. I'm a student from China.
A couple of days ago, when I was operating my UAV, something bad happened.
My quad copter was in AltHold. As the alt start to increase, the pitch channel don't work even if a move the stick to its min. What's even worse, altitude continued climbing and it cannot be controlled by RC. All of a sudden, all motors stops and my quad drop to the ground. The leds on pixhawk were still blinking.
My quad frame is 550mm and motors are 680kv.
Flight controller is pixhawk v2.
Anyone knows what's going on?
This pic is Alt vs RC3, Pitch vs DesPitch
Log data is attached.
Replies
there is no Pixhawk "v2" , and you have no current/battery voltage sensor, so I guess this is one of those knockoffs without power redundancy.
The way your log ends, at altitude, indicates that it lost power/rebooted for some reason.
Real Pixhawk has a dedicated power selector IC that makes it possible to run of reliable power from up to three inputs. - none of the knockoffs I've seen does not have that.