Re: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43, Issue 6

[Andrei Rylin]

Why IR ? Has anybody tried magnetic sensors ?
Like this one:
http://www.sparkfun.com/commerce/product_info.php?products_id=244

On 10/12/07, address@hidden <address@hidden> wrote:
>
> Indoors it doesnt work of course, needs to see the temperature difference
> between the sky and the ground.  Urban, well I would guess flying between
> buildings isnt going to work.  Antoine has flown his Quadrotor using a
> kalman filtered IMU for stabilization.  I dont believe he flew it
> autonomously as he couldnt get a good position solution between GPS and the
> IMU solution.  Anything can be done of course, its just a matter of getting
> hardware, and writing code.
>
> Anton
>
>
> -------- Original Message --------
> From: David <address@hidden>
> Date: Fri, October 12, 2007 8:59 am
> To: "address@hidden" <address@hidden>
>
> Greetings Anton,
> I have a lot to learn still.
> How does the IR sensor do indoors? In urban environments?
> I would like to create an electric heli MAV potentially.
> Best,
> David
>
> Sent from my iPhone
>
> On Oct 12, 2007, at 6:34 AM, address@hidden wrote:
>
> > Send Paparazzi-devel mailing list submissions to
> > address@hidden
> >
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> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Paparazzi-devel digest..."
> >
> >
> > Today's Topics:
> >
> > 1. Antenna tracking updates? (Tom Apker)
> > 2. Tracker for antennas (Rui Costa)
> > 3. Re: FBW and AP... (Alexis Lussier Desbiens)
> > 4. Re: FBW and AP... (Pascal Brisset)
> > 5. Re: Paparazzi-devel Digest, Vol 43, Issue 5 (David Conger)
> > 6. RE: Re: Paparazzi-devel Digest, Vol 43, Issue 5
> > (address@hidden)
> > 7. AW: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43,
> > Issue 5 (Ethan Arnold)
> >
> >
> >
> ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Thu, 11 Oct 2007 14:09:52 -0400
> > From: "Tom Apker" <address@hidden>
> > Subject: [Paparazzi-devel] Antenna tracking updates?
> > To: address@hidden
> > Message-ID:
> >
> <address@hidden>
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Group,
> >
> > Has there been any progress on Jeremie Vacher's antenna tracking
> > project? My lab has recently started collaborating on a much more
> > ambitious project that will, hopefully, involve multiple aircraft
> > flying semi-random paths. While we could use teams of undergraduates
> > with yagi's, it would be nice to automate the process. Plus, we
> > wouldn't want to give the local duck hunters any ideas.
> >
> > I have a little antenna-pointing experience myself if the project
> > needs some help, although I don't want to promise much.
> >
> > Thanks,
> >
> > -Tom
> >
> >
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Thu, 11 Oct 2007 20:05:36 +0000
> > From: "Rui Costa" <address@hidden>
> > Subject: [Paparazzi-devel] Tracker for antennas
> > To: address@hidden
> > Message-ID:
> >
> <address@hidden>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Where can I find the contact of Jeremie Vacher, a student at ENAC? I
> > need
> > informations about his tracker for antennas. I would like to develop
> > one.
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> http://lists.gnu.org/pipermail/paparazzi-devel/attachments/20071011/01dc566e/attachment.html
> >
> > ------------------------------
> >
> > Message: 3
> > Date: Thu, 11 Oct 2007 16:50:19 -0700
> > From: "Alexis Lussier Desbiens" <address@hidden>
> > Subject: Re: [Paparazzi-devel] FBW and AP...
> > To: address@hidden
> > Message-ID:
> >
> <address@hidden>
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Ok... I found that I have issue much sooner than that! I tried to
> > enable the "debug" mode on the FBW by adding the line <define
> > name="TELEMETRY_MODE_FBW" value="1"/> in my airframe file. But I think
> > I don't put it in the right section because it is not doing
> > anything...
> >
> > Anyway, I added the PPM signal to the "default" mode and I only get
> > 0,0,0,0,0... Can someone tell me which file I should look at to make
> > it work? Because right now... it doesn't seem to do much!
> >
> > Thanks!
> >
> > Alexis
> >
> > On 10/6/07, Pascal Brisset <address@hidden> wrote:
> >> Hi Alexis,
> >>
> >> Alexis Lussier Desbiens wrote:
> >>> Hey,
> >>>
> >>> I got a really stupid question... how do you switch between FBW mode
> >>> and AP mode in paparazzi? Is it over the serial link? With the RC
> >>> controller?
> >>>
> >> Terminology: FBW and AP are processes, not modes. FBW handles the RC
> >> reception and the servo commands while AP handles ... the rest. On a
> >> dual processor board, these processes are distributed over the two
> >> CPUs.
> >> On a single processor board (e.g. the Tiny), these processes are only
> >> logically splitted.
> >> The current implemented "modes" are MANUAL, AUTO1, AUTO2, HOME and
> >> NOGPS. The MANUAL mode is implemented in the FBW process. All the
> >> other
> >> modes require FBW and AP.
> >>
> >> --Pascal
> >>
> >>> Alexis
> >>>
> >>>
> >>> _______________________________________________
> >>> Paparazzi-devel mailing list
> >>> address@hidden
> >>>
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >>>
> >>
> >>
> >>
> >> _______________________________________________
> >> Paparazzi-devel mailing list
> >> address@hidden
> >>
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >>
> >
> >
> > --
> > http://mecano.gme.usherb.ca/~alussierdesbiens
> > "De' remi facemmo ali"
> >
> >
> >
> >
> > ------------------------------
> >
> > Message: 4
> > Date: Fri, 12 Oct 2007 07:26:52 +0200
> > From: Pascal Brisset <address@hidden>
> > Subject: Re: [Paparazzi-devel] FBW and AP...
> > To: address@hidden
> > Message-ID: <address@hidden>
> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> >
> > Alexis Lussier Desbiens wrote:
> >> Anyway, I added the PPM signal to the "default" mode and I only get
> >> 0,0,0,0,0... Can someone tell me which file I should look at to make
> >> it work? Because right now... it doesn't seem to do much!
> >>
> >
> > 1) Check the PPM signal on the appropriate pin (PPM_In, c.f.
> >
> http://www.recherche.enac.fr/paparazzi/wiki/index.php/Tiny)
> > 2) Check that your configuration includes the appropriate RC
> > configuration file. The file name must appear in the conf.xml file
> > (c.f.
> >
> http://www.recherche.enac.fr/paparazzi/wiki/index.php/Conf.xml).
> > The contents of this file is described in
> >
> http://www.recherche.enac.fr/paparazzi/wiki/index.php/Radio_Control
> :
> > - wrong attributes of the "radio" element will prevent the decoder
> > to
> > recognize any PPM frame;
> > - same for a wrong number or channels.
> >
> > A oscilloscope may help !
> >
> > --Pascal
> >
> >
> >
> >
> > ------------------------------
> >
> > Message: 5
> > Date: Thu, 11 Oct 2007 23:25:30 -0700
> > From: "David Conger" <address@hidden>
> > Subject: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43, Issue 5
> > To: address@hidden
> > Message-ID:
> >
> <address@hidden>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Greetings again,
> >
> > I realize even after building the tiny to "fly" the plane I will
> > need some
> > way for the autopilot to know the attitude and pitch/yaw/roll that
> > is going
> > on and correct...IR sensors to me seem super crude.
> >
> > Has anyone seen these:
> >
> http://www.analog.com/UploadedFiles/Data_Sheets/ADIS16350_16355.pdf
> >
> > Seems to have everything necessary in one place. Would this work
> > with a
> > Tiny? Anyone willing to hint me to the right resource to learn how I
> > would
> > do that? I'm assuming tiny would just need to "read" the outputs
> > from this
> > and simply apply the same PID logic correct?
> >
> > I'm guessing in short time these parts will come down in price
> > considerably.
> >
> >
> > Also, I have been lucky. Someone I work with has offered to build me 2
> > Tiny's. I work for a large company that has labs with all the
> > equipment. So,
> > he's an awesome resource for me. Seems he found several issues with
> > either
> > the Mouser Parts and the Circuit Board I'll share when he debriefs
> > me on
> > completion of the first board. I also hear there is a company nearby
> > that
> > will build/fabricate circuit boards for me from designs. I will ask
> > him
> > about the tiny 2.1. So, a big leap forward on my end. Is the Eagletree
> > design ready for fabrication that's in CVS?
> >
> > Best Regards,
> > David Conger
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> http://lists.gnu.org/pipermail/paparazzi-devel/attachments/20071011/3ef75ab0/attachment.html
> >
> > ------------------------------
> >
> > Message: 6
> > Date: Fri, 12 Oct 2007 06:29:08 -0700
> > From: address@hidden
> > Subject: RE: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43,
> > Issue 5
> > To: address@hidden
> > Message-ID:
> >
> <address@hidden
> > >
> >
> > Content-Type: text/plain; charset="us-ascii"
> >
> > An HTML attachment was scrubbed...
> > URL:
> http://lists.gnu.org/pipermail/paparazzi-devel/attachments/20071012/6eee1bf9/attachment.html
> >
> > ------------------------------
> >
> > Message: 7
> > Date: Fri, 12 Oct 2007 15:34:32 +0200
> > From: "Ethan Arnold" <address@hidden>
> > Subject: AW: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43,
> > Issue 5
> > To: <address@hidden>
> > Message-ID: <address@hidden>
> > Content-Type: text/plain; charset="us-ascii"
> >
> > Hehehe, good answer Anton :-)
> > Yes, sometimes the simplest solutions are the best...
> >
> > Ethan
> >
> > ________________________________
> >
> > Von: address@hidden
> >
> [mailto:address@hidden
> Im
> > Auftrag von
> > address@hidden
> > Gesendet: Freitag, 12. Oktober 2007 15:29
> > An: address@hidden
> > Betreff: RE: [Paparazzi-devel] Re: Paparazzi-devel Digest, Vol 43,
> > Issue 5
> >
> >
> > David,
> > In short, no this sensor is not all you need. The reason for this
> > is that
> > it is an inertial based sensor. It will output both rates and
> > accelerations, but give you no information on attitude. Without
> > attitude
> > the aircraft wont know which way is up as we like to say. People
> > who use
> > these sensors apply various filters, the most common of which is a
> > kalman
> > filter to take the data from these noisy and drifting sensors, and
> > try to
> > get an accurate attitude model. They are prone to getting confused
> > simply
> > because the new position is always based on the previous one, so
> > care must
> > be taken when writing the filter, and to put limits and bounds on
> > the inputs
> > from the sensors.
> >
> > In the case of hte IR, although "Crude" as you say, they output an
> > angle.
> > This absolute attitude means the plane can not get confused of 1
> > blip of
> > data is bad, because it will just use the next. These sensors have
> > proved
> > they work over water, in deep cold, and even in snow I think(iceland
> > team
> > chime in here). So although crude, the proof is in the demonstration
> > success. Look at the record of MAV competitions the last 3 years
> > and you
> > will see its a IR based airplane on top almost every time. Not bad
> > for some
> > FMA hobby crap huh?
> >
> > Anton
> >
> >
> > -------- Original Message --------
> > From: "David Conger" <address@hidden>
> > Date: Thu, October 11, 2007 11:25 pm
> > To: address@hidden
> >
> > Greetings again,
> >
> > I realize even after building the tiny to "fly" the plane I will
> > need some way for the autopilot to know the attitude and pitch/yaw/
> > roll that
> > is going on and correct...IR sensors to me seem super crude.
> >
> > Has anyone seen these:
> >
> http://www.analog.com/UploadedFiles/Data_Sheets/ADIS16350_16355.pdf
> >
> > Seems to have everything necessary in one place. Would this work
> > with a Tiny? Anyone willing to hint me to the right resource to
> > learn how I
> > would do that? I'm assuming tiny would just need to "read" the
> > outputs from
> > this and simply apply the same PID logic correct?
> >
> > I'm guessing in short time these parts will come down in price
> > considerably.
> >
> > Also, I have been lucky. Someone I work with has offered to build
> > me
> > 2 Tiny's. I work for a large company that has labs with all the
> > equipment.
> > So, he's an awesome resource for me. Seems he found several issues
> > with
> > either the Mouser Parts and the Circuit Board I'll share when he
> > debriefs me
> > on completion of the first board. I also hear there is a company
> > nearby that
> > will build/fabricate circuit boards for me from designs. I will ask
> > him
> > about the tiny 2.1. So, a big leap forward on my end. Is the Eagletree
> > design ready for fabrication that's in CVS?
> >
> > Best Regards,
> > David Conger
> >
> >
> >
> > ________________________________
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> >
> <http://email.secureserver.net/pcompose.php?aEmlPart=0&type=reply&folder=INB
> > OX&uid=1494#Compose>
> >
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> >
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
> >
> > End of Paparazzi-devel Digest, Vol 43, Issue 6
> > **********************************************
>
>
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