I have a problem: Often, my aircraft flying Arduplane 3.3 on a Pixhawk with an airspeed sensor ignores my target airspeed. For example: I have planned a mission using the survey grid (v1) feature, setting target airspeed to 19 m/s and checking the box to “Use speed for this mission”. We are flying mapping missions. Flying this speed is critical, because we needed to take pictures at a very high frequency near the maximum rate of the camera. Throughout the mission, however, the plane flew much faster; target airspeed was around 22.4 m/s with the actual airspeed hovering around this value as it was a very gusty day.
This lead to a lot of pictures not being taken because the camera could not follow the shutter command.
Do you have any insight why the target airspeed was not set to the 19 m/s I commanded in the mission? I have checked the onboard logs, the command was included properly.
I had similar problem when the plane always flew at maximum airspeed and would not drop to target the airspeed.
In my case the min ground speed was set to 9000 (90m/s) instead of 900 (9m/s) so i would double check all your min max and target parameters to make sure nothing is out.
I took a quick look and the airspeed for most of the ‘AUTO’ sections seems to average out at around 15m/s with just a short period in the 20’s. Can you clarify what you expected it to be?