Hi all,
I'm still trying to get a grip on altitude hold, but didn't get a usefull reply on my previous request for help.
When engaging altitude hold my quadcopter slowly drops to the ground, even with 3D gps fix and stick output around 700. I'm using AQ 6.6 rev37 for board #2.
Somehow I think the 'malfunctioning' of altitude hold has something to do with my pressure sensor.
I assume the AQ board uses the high resolution of the pressure sensor to determine the height and differences in height.
For analysis I made a short testflight where I hovered three times about 2 m above the ground. In the period between the hovering the quadcopter stood on the ground. When I plot [log_ukf_alt_pres] the result is a line that rises with time.
See attached image. For further analyses the download link to the logfile is:
I'd expect the controller to return the same value when standing on the ground.
There seems to be a drift in the output of the pressuresensor values that is so large it seems to correspond with the droprate of my quadcopter.
I'd really like to make a step with the development, but don't know where to start.
So this is my repeated request for help.
Hope someone can help me.
Best regards,
Jan Willem