Hi,
We were doing a boring repetitive flight when suddenly the GCS warned that the airspeed sensor was unhealthy and the aircraft was flying at a speed far beyond the set value.
We checked the airspeed sensor and GPS readings in the logs and all the data showed that everything seemed to be normal. But at that moment, Ardupilot stopped using the airspeed sensor, even though the readings returned by the sensor seemed to be fine.
What we want to understand is:
Why did Ardupilot stop using the airspeed sensor data? We never found the answer in this issue because all the data seemed to be normal.
Why did the aircraft fly at a very high speed after the airspeed meter failed, instead of using the synthetic airspeed based on the GPS speed reference fusion?
We uploaded some pictures, but they may not be so easy to distinguish. If you are interested in this issue and are happy to answer, you can download the log files in the link.
We have already done the airspeed sensor calibration before takeoff.
And the airspeed sensor pipe is far away from the battery strap, and it is unlikely to be compressed after 2 hours of flight.
After the flight, we checked the pitot tube for leaks, and from the data, the airspeed sensor seems to have been reliable, even after the autopilot announced that it would no longer use its data.
