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Re: [Paparazzi-devel] MS4525 Airspeed sensor drivers

From: Tobias
Subject: Re: [Paparazzi-devel] MS4525 Airspeed sensor drivers
Date: Wed, 1 Jul 2015 23:34:02 +0200


yes I have two amsys sensors in operation (both 003) and I m happy with it! 
As Rolf already stated they are temperature compensated and the temperature is 
available in GCS on request.

For the resistors I used standard components and soldered them very tied to the 
sensor and glued them to the casing. that worked pretty well and is done in no 

Next time I will go definitely with the 001 because of its higher resolution 
for low airspeeds - I usually fly around 10-20m/s and thats well covered. 
I also have an amsys sensor for baro but that one seems to be a little more 
noisy than the ms5611.  …but it has this nice tube connection like the 
differential sensor… 

for the pito probe I figured out that it is more important to have it in free 
stream (at least 2-3cm in front of any airframe part) than to change the 
diameter, but more tests are always welcome.

to finally configure and correct for any deviation you should compare the gps 
speed with the amsys airspeed in a steady circle. In ideal conditions with a 
well tuned aircraft the airspeed will be constant and the gps speed will 
oscillate around it. For deviation you can adjust the parameter       
<define name="AIRSPEED_AMSYS_SCALE" value="1."/>    
in your airframe.


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