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Wind speed/dir from APM?

Posted by Pedals2Paddles on March 29, 2014 at 9:27am

I notice the APM is (I think) estimating wind speed and direction.  I can display wind speed and direction on Mission Planner and in minimOSD.  I can't find anything documenting this.  How is it coming to this conclusion?

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Replies

  • Dragu Mihai October 13, 2015 at 1:45pm

    Are any solutions to measure wind speed and direction on the newly AC3.3? I saw there are some telemetry parammeters/ osd parammeters who promise

  • weiqiang November 15, 2014 at 10:54pm
    Have you clear about wind speed/dir with mutimotor?
  • Anand S. Biradar April 15, 2014 at 11:24pm

    Is This a relative wind with respect to APM or is it true wind prediction ?

    • T3
      William Premerlani > Anand S. Biradar July 26, 2014 at 6:31am

      Anand,

      The method computes true wind vector in earth frame of reference. It has been used routinely for fixed wing aircraft by several autopilots, including APM and MatrixPilot. It does provide a reasonably accurate estimate of both the airspeed and the wind speed without an airspeed sensor, provided the aircraft makes a few turns once in a while. The details of the turn are not important, as long as the aircraft changes direction.

      Best regards,

      Bill

      • Patrick O'Neill > William Premerlani January 9, 2015 at 12:14pm

        Hi William, I have looked for the answer to my question and can't seem to nail it down...please help?

        Is the MatrixPilot3/4 for use in the APM2.6 while not using an airspeed sensor?, and by downloading it to the APM?

        If so...please elaborate on how to use it, or where to find this instruction.

        Thank you so much, Patrick aka noob to APM

        • T3
          William Premerlani > Patrick O'Neill January 9, 2015 at 2:41pm

          Patrick,

          MatrixPilot and APM are two different autopilot systems with common roots. MatrixPilot runs on the UAVDevboard and APM runs on the various 3DRobotics platforms. Both systems do a fine job of determining wind vector and airspeed without the need for an airspeed sensor.

          Here is a link to the original posting on the method that is used:

          http://diydrones.com/forum/topics/wind-estimation-without-an

          Since you are asking your question on the home of 3DRobotics, I assume that you are using an APM. It is a fine system with plenty of support both from 3DRobotics and the diydrones community.

          Best regards,

          Bill Premerlani

  • Sam Tabor March 30, 2014 at 7:14am

    https://code.google.com/p/gentlenav/downloads/detail?name=WindEstim...

    • Pedals2Paddles > Sam Tabor March 31, 2014 at 4:46pm

      That was way too much math. I stop doing math when letters and other funny looking symbols pop up.  I'll take your word for it.  Does this apply to or not apply to multirotors?

      • T3
        William Premerlani > Pedals2Paddles July 26, 2014 at 6:27am

        Pedals2Paddles,

        As far as I know, the method referenced by Sam does not work for multirotors. Perhaps someone from the APM team can comment on what they are using for multirotors.

        Best regards,

        Bill

    • Aaron Curtis > Sam Tabor March 30, 2014 at 12:19pm

      Pretty cool... I'm looking for something applicable to multirotors, though.

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