Altitude hold\loiter problems altitude on pixhawk 3.4.6

ArduCopter Copter 3.4
1

Hello friends, I have a problem with the retention of height in the first minutes of the flight.
Then everything works stably. Tell me why this problem may be? On what settings should I pay attention?
My log https://yadi.sk/d/mef9uuMm3K7KLh

2

I removed buzzer from pixhawk and everything became normal. Thanks to all

3

Hi,

Glad to hear you found it - but I’d be interested to understand the connection.

Was the buzzer sounding while you had the instability issues?

Christian

4

Yes, logs are well seen when the signal from the buzzer comes, strong vibration on the Z axis, because of this the Kalman filter does not immediately make the correct decision about the altitude.