[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] airspeed_ets calibration

From: alonso acuña
Subject: Re: [Paparazzi-devel] airspeed_ets calibration
Date: Tue, 27 Aug 2013 01:09:10 -0600

Hi. I have one of these sensors but my plane is not flying yet so I can't test at this time. I think you should try to discuss this with the manufacturer as it seems that if you had to calibrate for temperature they should have included a thermometer directly in the sensor. Otherwise it would be useless as sold. Perhaps there is another explanation.

On Aug 26, 2013 6:48 AM, "Refik Sever" <address@hidden> wrote:

I tried to disable the airspeed_ets offset calculation in initialization. However, it did not work because I think that sensor offset strictly depends on temperature. When I first power on, sensor gives values around 1500. It worked for 15-20, and it came to its actual offset value of 1550. It was in room so the temperature was constant. I think that the sensor's own temperature has increased because of working.

Considering the temperature variation during long flights, I think that we must calibrate the sensor for temperature variation.

Best regards,

>In the airspeed_ets.c file, I saw that the offset value ("airspeed_ets_offset", not "AIRSPEED_ETS_OFFSET") is >calculated for once when we power on the autopilot. Therefore, the offset changes in every time we open it >in different wind conditions. That explains why we couldn't calibrate it.

>I think that calculating and fixing the airspeed_ets_offset for once will be better then to change it in every >power on.

Paparazzi-devel mailing list

reply via email to

[Prev in Thread] Current Thread [Next in Thread]