Re: [Paparazzi-devel] Flight Plan for Soaring

[Chris Gough]

Hi Todd

re: total energy vario. Given an uncorrected vario (e.g. ETS module),
couldn't the AP correct it in software by incorporating the airspeed
estimate (or measured airspeed, if available)? I realise that's not
sufficient for thermalling, but might be useful for other things (like
tuning for efficiency).

Chris Gough



On Mon, Feb 28, 2011 at 9:54 PM, Todd Sandercock
<address@hidden> wrote:
> I was thinking a piggyback processor telling the Tiny what to do... Also the
> piggyback processor could be collecting better air data (total energy vario)
> to make better centring decisions.
> Todd
> ________________________________
> From: Marc Schwarzbach <address@hidden>
> To: address@hidden
> Sent: Mon, 28 February, 2011 8:37:58 PM
> Subject: Re: [Paparazzi-devel] Flight Plan for Soaring
>
> Hi Reto,
>
> I also thought about the idea of soaring with paparazzi.
> The Papers mentioned are quite good.
>
> The problem I ran into is that you have to keep the thermal field data
> somewhere in a memory to calculate the center of the thermal. On a desktop,
> it is not a problem. The limited memory onboard is not enough for this
> method.
>
> So I see two solutions (for the current Tiny autopilots):
> -Process the Information in the ground control PC (like it´s done with the
> wind estimation at the moment, which was probably done for the same reason).
> -Develop a new algorythm which works on the limitied power and memory of the
> autopilot (would be cool and worth a publication :-)
>
> Please keep us posted and ask if there are problems.
> There seem to be some people interested...
>
> Cheers
>
> Marc
>
>
> -------- Original-Nachricht --------
>> Datum: Mon, 28 Feb 2011 09:24:53 +0100
>> Von: "Reto Büttner" <address@hidden>
>> An: address@hidden
>> Betreff: Re: [Paparazzi-devel] Flight Plan for Soaring
>
>> Hi Todd,
>>
>> thanks for the hints.
>>
>> I actually am a full scale glider pilot myself as well. So I
>> understand the techniques of soaring thoroughly. The challenge is to
>> get this into paparazzi as simple as possible.
>>
>> Dan Edwards has done a brilliant job in autonomous soaring:
>> http://goosetech.homelinux.com/soaring/index.php
>> Unfortunately he used piccolo of cloudcap, not paparazzi :-(
>>
>> I am still open to any paparazzi flight plan details!
>>
>> Cheers, Reto
>>
>> 2011/2/28 Todd Sandercock <address@hidden>:
>> > As a glider pilot I will say now that there is a lot more to soaring
>> than
>> > just turning in an updraft.... You may want to do some research into
>> thermal
>> > centring techniques first. This link is a pretty good
>> >
>>
>> start: 
>> http://jesuscondorbase.blogspot.com/2010/11/thermaling-pt2-centering-techniques.html
>> > Also there  is a couple of papers floating around the internet from
>> NASA
>> > where the experiment with autonomous soaring. Very good
>> >
>> reference: http://dtrs.dfrc.nasa.gov/archive/00001620/01/214611-REV1.pdf
>> > This is just a start....
>> > Todd
>> > ________________________________
>> > From: Reto Büttner <address@hidden>
>> > To: address@hidden
>> > Sent: Mon, 28 February, 2011 9:33:22 AM
>> > Subject: [Paparazzi-devel] Flight Plan for Soaring
>> >
>> > Hi guys,
>> >
>> > for autonomous soaring I want the plane to circle, as long as it is in
>> > an updraft. Will a statement similar to the following work?
>> >
>> > <circle radius="50" until="estimator_vz < 0.0" wp="WP" throttle="0.0"
>> > pitch="-5" vmode="throttle"/>
>> >
>> > Does the variable estimator_vz exist?
>> >
>> > Has someone in the paparazzi community already programmed a flight
>> > plan for autonomous soaring?
>> >
>> > Cheers,
>> > Reto
>> >
>> > _______________________________________________
>> > Paparazzi-devel mailing list
>> > address@hidden
>> > http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>> >
>> >
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>> >
>> >
>>
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