While flying, I started to discover some issues with the internal barometer. Here are some ground tests I did:
Using Flightplot, I plotted Thrust (blue, 0-5) and measured altitude (red, meters). Here is the relation:
In all of these cases, I increased throttle until right before the vehicle was to lift off. During this, the relative altimeter started to read negatives values. I’ve also noticed this happen when I go into forward flight:
You can see at the end of the log file the barometer altitude shoots up and the vehicle plowed into the ground.
My question is: Why does this happen? How can I correct for it?
- Pixhawk Cube
- PX4 1.8.0
- QGround 3.4.3