MY quad loses altitude bad when going forward and gains altitude going backwards. It's holds nicely in level flight. The barometer aka Pixhawk is well protected from direct air movements. Is there a X factor, if you will, that can get tweaked in the pids? It just seems like it needs to apply a bit more throttle going forward and less going backwards.
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When it hovers, does it "think" it is level? You can see the attitude on the MP horizon from telemetry data, and if you don't have telemetry you can log the attitude onboard and read or maybe replay the logs.
Arducopter does correct throttle for tilt all right but that only works properly if both input (attitude measurement) and output (motors and ESCs) are in good shape. If both have errors that just happen to correct each other you can hover okay but the throttle correction will no longer work.
Regards
Soren
Hi Soren thanks for the reply
I believe so. I have also re-calibrated it a few times. It hovers nicely and doesn't seem to want to wander off in any consistent direction.
Update- The quad is water tight I'm thinking I need to come up with a better vent system. It seems to make a big difference how or where it gets the venting from.