On Aug 15, 2013 8:50 AM, "Refik Sever" <
address@hidden> wrote:
Hello,
Reto:
>As soon as GPS is back, normal behaviour should restore.
>
>Didn't this work in your case?
Martin:
>this was designed in the good old days of infrared attitude estimation. If the
>attitude algorithm needs GPS it might fail after some time.
Actually we did not tune our failsafe properly. And we are using energy control loops.
In the second flight, we tried to tune the failsafe and we manually switched to GPS_LOST state. It was better, but again it did not properly control the airplane.
Reto:
>I don't like an additional GPS as it adds
>complexity, failure modes, cost, weight and installation and service effort.
We can tolerate the additional weight, complexity and service effort. Is there anyone who added a second GPS?
Best regards,
Refik
__________________________________
Hi Refik
The behaviour at GPS loss can be configured for graceful degradation, see:
http://paparazzi.enac.fr/wiki/Failsafe#GPS_signal_lost
As soon as GPS is back, normal behaviour should restore.
Didn't this work in your case?
Regards
Reto
2013/8/15 Refik Sever <address@hidden>
> Dear all,
>
> Yesterday, our GPS was lost for 2 seconds and our plane went to failsafe.
> We were lucky and it did not crash.
>
> I want to add a second GPS for reliability. Is there anyone implemented it
> already?
>
> Regards,
> Refik
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>
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Message: 5
Date: Thu, 15 Aug 2013 12:52:43 +0200 (CEST)
From: Martin Mueller <address@hidden>
To: address@hidden
Subject: Re: [Paparazzi-devel] how to use 2 GPS simultaneously?
Message-ID:
<address@hidden>
Content-Type: text/plain; charset=UTF-8
Hi,
> The behaviour at GPS loss can be configured for graceful degradation, see:
>
> http://paparazzi.enac.fr/wiki/Failsafe#GPS_signal_lost
>
> As soon as GPS is back, normal behaviour should restore.
this was designed in the good old days of infrared attitude estimation. If the
attitude algorithm needs GPS it might fail after some time.
https://github.com/paparazzi/paparazzi/issues/358
Martin
>
> Didn't this work in your case?
>
> Regards
> Reto
>
>
>
> 2013/8/15 Refik Sever <address@hidden>
>
> >? Dear all,
> >
> > Yesterday, our GPS was lost for 2 seconds and our plane went to failsafe.
> > We were lucky and it did not crash.
> >
> > I want to add a second GPS for reliability. Is there anyone implemented it
> > already?
> >
> > Regards,
> > Refik
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
> >
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
------------------------------
Message: 6
Date: Thu, 15 Aug 2013 13:17:42 +0200
From: Reto B?ttner <address@hidden>
To: Martin Mueller <address@hidden>, "address@hidden"
<address@hidden>
Subject: Re: [Paparazzi-devel] how to use 2 GPS simultaneously?
Message-ID:
<address@hidden>
Content-Type: text/plain; charset="iso-8859-1"
Thanks for the advice. This is really an annoying behaviour and a clear
step back from infrared attitude estimation.
I would heavily prefer a software solution for graceful degradation as
discussed in issue#358. I don't like an additional GPS as it adds
complexity, failure modes, cost, weight and installation and service effort.
Any solutions on providing an AHRS algorithm robust to GPS loss are highly
appreciated. For a limited timespan of 10, 20 or maybe even more seconds
that should be quite easily possible.
Regards, Reto
2013/8/15 Martin Mueller <address@hidden>
> Hi,
>
> > The behaviour at GPS loss can be configured for graceful degradation,
> see:
> >
> > http://paparazzi.enac.fr/wiki/Failsafe#GPS_signal_lost
> >
> > As soon as GPS is back, normal behaviour should restore.
>
> this was designed in the good old days of infrared attitude estimation. If
> the
> attitude algorithm needs GPS it might fail after some time.
>
> https://github.com/paparazzi/paparazzi/issues/358
>
> Martin
>
>
> >
> > Didn't this work in your case?
> >
> > Regards
> > Reto
> >
> >
> >
> > 2013/8/15 Refik Sever <address@hidden>
> >
> > > Dear all,
> > >
> > > Yesterday, our GPS was lost for 2 seconds and our plane went to
> failsafe.
> > > We were lucky and it did not crash.
> > >
> > > I want to add a second GPS for reliability. Is there anyone
> implemented it
> > > already?
> > >
> > > Regards,
> > > Refik
> > >
> > > _______________________________________________
> > > Paparazzi-devel mailing list
> > > address@hidden
> > > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> > >
> > >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
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Message: 7
Date: Thu, 15 Aug 2013 14:36:23 +0200
From: Felix Ruess <address@hidden>
To: Paparazzi devel list <address@hidden>
Subject: Re: [Paparazzi-devel] how see a/c heading in GCS
Message-ID:
<CAEc+GFcc3onh-LMEu5TBgwLW3_7rpebNa2Q=address@hidden>
Content-Type: text/plain; charset="utf-8"
Hi Alonso,
the aircraft icon on the map shows you which way it's pointing...
It might be nice however to add the aircraft heading to the PFD at the
bottom, anyone up for this?
Cheers, Felix
On Thu, Aug 15, 2013 at 12:49 AM, alonso acu?a <address@hidden> wrote:
> Hello. Is there a way to see which way the aircraft nose is pointing? For
> example I would like to see if the aircraft is pointing straight north.
>
> thanks
>
> Alonso Acu?a
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>
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