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Today's Topics:
1. Re: Missing TWOG design and gerbers? (David Conger)
2. Re: Course desired issues (Gautier Hattenberger)
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Message: 1
Date: Fri, 13 Jun 2008 00:56:45 -0700
From: David Conger <address@hidden>
Subject: Re: [Paparazzi-devel] Missing TWOG design and gerbers?
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Hello,
Pascal, thank you for your comments. The changes to PPZUAV site are
almost complete based on your inputs. I had avoided direct reference
to Paparazzi only out of fear it might upset the group. It is good to
hear it is welcome and encouraged. Do not hesitate to tell us more.
FWIW: The images on PPZUAV are our own. If the image exists on the
Wiki it's because we put it there to add to the Wiki. There are many
images and edits from dconger (myself) on the Wiki. For the curious,
the nice thing about the Wiki is you can view all page history and
edits easily to see who really contributes and what they contribute.
On the topic of vendors I really hope to lead by example. Things I
personally have done to promote Paparazzi are many and the list I
wrote out was too long for this reply. Many others offer more and it
just feels inappropriate to distract attention from the project. What
is most important isn't telling someone where to buy something or how
much it costs it's answering their questions and helping them to get
flying.
If I don't post more it's because I'm still learning. But as I learn I
give back and always will. I just hope other vendors follow because
help Paparazzi Project to grow and there will be room enough for
hundreds of vendors in the future because there will be thousands of
Paparazzi Projects out there.
I won't say any more. I just really wanted to take a minute to reply
because there is so much do and say that isn't related to selling
something. It is a world class product and you should all be proud. I
see many familiar names writing to the email list each day and it's
pretty cool to keep up on all the projects and to learn as I build
mine.
Keep up the amazing work because this will change the world.
Regards,
-David
On Jun 12, 2008, at 3:10 AM, address@hidden wrote:
Hi,
no gerber or design files for the TWOG have been published yet.
Michel has just
mounted one and is currently testing it. Thanks to the results of
these tests,
he will publish the files. We suppose the picture displayed at
http://shop.halfbase.com is the one coming from the Paparazzi wiki
(http://paparazzi.enac.fr/wiki/index.php/Twog_v1). The only source
for software
or hardware in this project is the wiki website and the CVS
repository. We do
not send files directly to anybody.
This message is an opportunity for me to make a remark: We are
really pleased
that people around the world build and sell hardware for the
Paparazzi project.
However, I'm quite surprised that no link to paparazzi.enac.fr
appear on the
sellers' websites. It would be nice to have at least one link to
paparazzi.enac.fr behind each Paparazzi icon and a link to the
corresponding
design files for each product. I think it would help to convince
ENAC to
continue to support this project ...
Thanks
--Pascal
Selon David Conger <address@hidden>:
I'm confused, one of the vendors Halfbase has the TWOG listed as
available but there are no gerbers or design files posted on the
Wiki?
Did someone skip posting to the Wiki and go straight to Halfbase?
Confused. I'd like to make some TWOG PCB but can't without either
the
design or gerber files.
-David
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------------------------------
Message: 2
Date: Fri, 13 Jun 2008 13:40:02 +0200
From: Gautier Hattenberger <address@hidden>
Subject: Re: [Paparazzi-devel] Course desired issues
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
Haiyang, you're absolutely right. The course setpoint is between -pi/2
and 3*pi/2 while the gps course is between 0 and 2*pi. And it's not a
problem because in fw_h_ctl.c:174 the difference between the two
angles
is normalized between -pi and pi before being used by the controller.
Daniel, if you want to have a nice display in your plotter, you can
add :
if (h_ctl_course_setpoint<0) h_ctl_course_setpoint += 2*M_PI;
after the line 309 in nav.c, but that won't change your navigation.
GH
Haiyang Chao a 嶰rit :
Just a few details to add for this question. Any comment is welcomed.
In nav.c, line 309, desired course is calculated as:
h_ctl_course_setpoint = M_PI/2.-atan2(y - estimator_y, x -
estimator_x);
The function atan2() can return values between [-pi, pi]. So the
desired course is just between [-pi/2,pi*3/2].
But for GPS course, based on my observation, moving north is
roughly 0
or 2*pi, moving south is around pi, moving east is pi/2, moving west
is pi*3/2.
So I guess there must be some difference between real course and
desired one unless there are some limitations on estimator_x and
estimator_y, which I have not take a detail look in the code. Really
busy recently for some hardware problems.
Thanks
Haiyang
On Thu, Jun 12, 2008 at 10:57 PM, Daniel Morgan
<address@hidden
<mailto:address@hidden>> wrote:
I have been talking to poine and anton about this issue for a
couple of days and they both concluded it should not be
happening... What is happening on this plot is the course
desired's range is -90 to 270 and and the acutal is 0 to 360...
Now i talked to anton today and he said that he talked to poine
and they thought it was a issue with my code being messed up or
something.. So on his advice i changed my old paparazzi's folder
name and did a completely new cvs... When i did this it did not
aleviate the issues. So i thought maybe it was something with my
pc or my config, because of this i decided to try out a completely
clean system. What i did was i booted of a ubunut 8.04 live cd and
installed pprz from this last nights tarball(cvs command was
having issues for some reason)and used only the files in the cvs
and still got the same issue. The screenshot is from that (you may
notice the time is off but don't let that fool ya)... Needless to
say i am hoping someone who knows the code better can fix this or
at least shed some more light on it...
here is that screenshot
http://img127.imageshack.us/img127/1593/screenshot1vh4.png
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End of Paparazzi-devel Digest, Vol 51, Issue 17
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