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Re: [Paparazzi-devel] Sonar


From: Bruzzlee
Subject: Re: [Paparazzi-devel] Sonar
Date: Tue, 03 Apr 2012 22:40:10 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:11.0) Gecko/20120327 Thunderbird/11.0.1

Hi

I just read the last two posts. Maybe you are interested in a different topic. If its so, ignore this hint. ;-)

Yes it's possible:
Gps + Sonar autonom landing (adc sonar) check out:
http://www.youtube.com/watch?v=NKyq2UT9sF4

Thanks to langede0 you can find the code here:
https://github.com/langede0/paparazzi
It's a special programmed landing. For details check out the pictures of page 67pp:
http://paparazzi.enac.fr/wiki/File:BA_FS11_Dokumentation_Drohne.pdf
--> its in German sry. take google translate ;-)

Distance > than max range of sonar = max range

sorry that we couldn't split up the project into separate modules. (lack of free time)
bruzzlee

On 03.04.12 18:53, Gautier Hattenberger wrote:
Hi,

On 03/04/2012 14:59, Loic Drumettaz wrote:

Hi gauthier,
I understand that the sonar module would need some improvement.

The module itself (measurements) is fine, it's the integration in the filter (subsystems/ins.c) that is really bad.

Did you or anyone already used it to take off or land with a rotorcraft?

I don't see why this would not work. I'm not sure of the behavior when you fly out of range of the sonar...

Did you try to use the sonar only by reducing baro_sens to around zero?

No. And I'm pretty sure it is not a good long term solution. There is an attempt to make a vertical filter dedicated to agl somewhere.

Gautier

Regards
Loic

Le 3 avr. 2012 08:48, <address@hidden> a écrit :
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Today's Topics:

  1. Re: help- paparazzi coding of the main board (Stephen Dwyer)
  2. Re: help- paparazzi coding of the main board (Regius Asiimwe)
  3. 10 m/s Minimum Speed in Simulator (Chris Wozny)
  4. Re: 10 m/s Minimum Speed in Simulator (Christophe De Wagter)


----------------------------------------------------------------------

Message: 1
Date: Mon, 2 Apr 2012 22:27:16 -0600
From: Stephen Dwyer <address@hidden>
To: address@hidden
Subject: Re: [Paparazzi-devel] help- paparazzi coding of the main
       board
Message-ID:
       <CAGNboiv+fpPb2uodCkaH=KFgNsKGh=address@hidden>
Content-Type: text/plain; charset="iso-8859-1"

Hello,

You should probably start by thoroughly looking through the
wiki<http://paparazzi.enac.fr/wiki/Main_Page>.
Paparazzi has components written in a number of languages, but the airborne
code is in C. To get started with the code, you will need to first install
the tools and get the code <http://paparazzi.enac.fr/wiki/Installation>.
You will have to explore the code to understand the system prior to writing
any additional code. You can also browse it online on
GitHub<https://github.com/paparazzi/paparazzi>
.

What kind of hardware do you have? Which main board?

Hope that helps get you started.

Thanks,
-Stephen Dwyer

On Mon, Apr 2, 2012 at 10:03 PM, Regius Asiimwe <
address@hidden> wrote:

> hello,
>
> been trying to start for a week now but i am not even sure what the
> environment i have to work in is.
>
> is it similar to c where u can code on a notepad? and is there a structure
> i have to follow ,
> plus , is there a standard library and sytanx?
>
>
> i have already looked at the enac forums...
>
> please help me i am running out of time.
>
> i have to start coding my main board so i can control speed of 8
> motors(rotors)
>
>
> Help Help Help please,
>
>
> Cheers,
>
> Regius
>
> On 3 April 2012 13:02, Jaime Rubio <address@hidden> wrote:
>
>> Hello,
>>
>> Trying to get my RC working I have noticed that I cannot switch modes.
>> Once I open the ground control station, it always stays as auto 2. I think
>> this may be related to the fact that it doesn't identify any GPS signal and
>> it works in a kind of failsafe mode automatically, can this be the reason?
>> There is also an error in the Paparazzi Center saying "Unix.Unix_error(2,
>> "read", "")". How can I get my GPS working? I have configured it with
>> U-center and everything is ok, however, it never works when connected to
>> Yapa.
>>
>> Thanks,
>>
>> --
>> Jaime Rubio
>> Autopilot Team Lead
>> *Phone:* 386-383-2738
>> *e-mail:* address@hidden
>>
>>
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>
>>
>
>
> --
> **
> *Kind Regards,*
> **
> *Regius Asiimwe*
>
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>
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------------------------------

Message: 2
Date: Tue, 3 Apr 2012 14:17:17 +0930
From: Regius Asiimwe <address@hidden>
To: address@hidden
Subject: Re: [Paparazzi-devel] help- paparazzi coding of the main
       board
Message-ID:
       <address@hidden>
Content-Type: text/plain; charset="iso-8859-1"

Thanx Stephen,

I will try start from there.
i have it installed at my uni computer but i will als install it on my home
pc.
i am using the ff:
http://paparazzi.enac.fr/wiki/Booz

i inherited my quadrotor from the previous project so i am still very green
about what is going on.

and i am running out of time.



On 3 April 2012 13:57, Stephen Dwyer <address@hidden> wrote:

> Hello,
>
> You should probably start by thoroughly looking through the wiki<http://paparazzi.enac.fr/wiki/Main_Page>.
> Paparazzi has components written in a number of languages, but the airborne
> code is in C. To get started with the code, you will need to first install
> the tools and get the code <http://paparazzi.enac.fr/wiki/Installation>.
> You will have to explore the code to understand the system prior to writing
> any additional code. You can also browse it online on GitHub<https://github.com/paparazzi/paparazzi>
> .
>
> What kind of hardware do you have? Which main board?
>
> Hope that helps get you started.
>
> Thanks,
> -Stephen Dwyer
>
>
> On Mon, Apr 2, 2012 at 10:03 PM, Regius Asiimwe <
> address@hidden> wrote:
>
>> hello,
>>
>> been trying to start for a week now but i am not even sure what the
>> environment i have to work in is.
>>
>> is it similar to c where u can code on a notepad? and is there a
>> structure i have to follow ,
>> plus , is there a standard library and sytanx?
>>
>>
>> i have already looked at the enac forums...
>>
>> please help me i am running out of time.
>>
>> i have to start coding my main board so i can control speed of 8
>> motors(rotors)
>>
>>
>> Help Help Help please,
>>
>>
>> Cheers,
>>
>> Regius
>>
>> On 3 April 2012 13:02, Jaime Rubio <address@hidden> wrote:
>>
>>> Hello,
>>>
>>> Trying to get my RC working I have noticed that I cannot switch modes.
>>> Once I open the ground control station, it always stays as auto 2. I think
>>> this may be related to the fact that it doesn't identify any GPS signal and
>>> it works in a kind of failsafe mode automatically, can this be the reason?
>>> There is also an error in the Paparazzi Center saying "Unix.Unix_error(2,
>>> "read", "")". How can I get my GPS working? I have configured it with
>>> U-center and everything is ok, however, it never works when connected to
>>> Yapa.
>>>
>>> Thanks,
>>>
>>> --
>>> Jaime Rubio
>>> Autopilot Team Lead
>>> *Phone:* 386-383-2738
>>> *e-mail:* address@hidden
>>>
>>>
>>>
>>> _______________________________________________
>>> Paparazzi-devel mailing list
>>> address@hidden
>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>>
>>>
>>
>>
>> --
>> **
>> *Kind Regards,*
>> **
>> *Regius Asiimwe*
>>
>>
>> _______________________________________________
>> 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
>
>


--
**
*Kind Regards,*
**
*Regius Asiimwe*
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------------------------------

Message: 3
Date: Mon, 2 Apr 2012 23:42:39 -0700
From: Chris Wozny <address@hidden>
To: paparazzi-devel <address@hidden>
Subject: [Paparazzi-devel] 10 m/s Minimum Speed in Simulator
Message-ID:
       <CAEZoMYP8+=address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

All,

I've been trying to lower my airspeed when flying since our aircraft
flies at less than 10 m/s. However, I've noticed that no matter where
I set the airspeed min/max set points, cruise speed, or anything to do
with speed, the simulator refuses to allow the aircraft to go below 10
m/s. Is this a hard limit imposed by the simulator or have people been
able to simulate fixed-wing flight below 10 m/s?

Best,
Chris



------------------------------

Message: 4
Date: Tue, 3 Apr 2012 08:48:27 +0200
From: Christophe De Wagter <address@hidden>
To: address@hidden, paparazzi-devel <address@hidden>
Subject: Re: [Paparazzi-devel] 10 m/s Minimum Speed in Simulator
Message-ID:
       <CAADQCJ17N18-ZHs9QDNKJNkqrTiinAqdtE86jOzCs+7E=address@hidden>
Content-Type: text/plain; charset="iso-8859-1"

The normal sim has simplified linearized dynamics with hard coded minimum
speed. With zero throttle you can still climb by pulling the pitch up. Use
fdm sim for more realism.
On Apr 3, 2012 8:42 AM, "Chris Wozny" <address@hidden> wrote:

> All,
>
> I've been trying to lower my airspeed when flying since our aircraft
> flies at less than 10 m/s. However, I've noticed that no matter where
> I set the airspeed min/max set points, cruise speed, or anything to do
> with speed, the simulator refuses to allow the aircraft to go below 10
> m/s. Is this a hard limit imposed by the simulator or have people been
> able to simulate fixed-wing flight below 10 m/s?
>
> Best,
> Chris
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
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