Re: [Paparazzi-devel] Automatic Takeoff and landing

[Nathan Aherne]

Hi Pascal,

Doing what you says moves all the waypoints etc, because the setpos button 
changes the lat lon of the whole flight plan. This option would be ok if the 
waypoints could be set using their own latitude and longditude but they are x,y 
from the lat lon. Is there another way to set the start point or do I have to 
make the lat lon of the flight plan the place I want to start the aircraft?

Maybe I am being too pedantic, and when I do this for real I can choose any 
start point I want and the aircraft will fly to where its told.

Kindest regards,
 
Nathan Aherne
Reddog Technology
Web: www.reddog.com.au
Email: address@hidden
Mob: 0402 555 080

On 21/04/2010, at 9:29 PM, Pascal Brisset wrote:

> In simulation ?
> 
> Stop the Simulator agent and restart it *without* the "-boot" option. Then 
> use the "Set Pos" button of the simulator interface to set the original 
> position of the A/C. Then clock "Boot".
> 
> And find the right place to add the info in the wiki ? :-) 
> http://paparazzi.enac.fr/wiki/Simulation
> 
> --Pascal
> 
> Nathan Aherne wrote:
>> Hi Pascal,
>> 
>> Thank you for your reply, much appreciated!
>> 
>> I am having most trouble with the fact that the aircraft starts from the lon 
>> and Lat in the flight_plan file and I cannot work out how to move it. Am I 
>> able to specify the start point for the aircraft?
>> 
>> Kindest regards,
>> 
>> Nathan Aherne
>> Reddog Technology
>> Web: www.reddog.com.au
>> Email: address@hidden
>> Mob: 0402 555 080
>> 
>> ----- Original Message -----
>> From: "Pascal Brisset" <address@hidden>
>> To: address@hidden
>> Sent: Wednesday, 21 April, 2010 7:50:09 PM
>> Subject: Re: [Paparazzi-devel] Automatic Takeoff and landing
>> 
>> Hi,
>> 
>>  
>>> *Pre Flight Checks* - is it possible to code something similar to the 
>>> preflight checks on a normal aircraft?
>>>    
>> For example ?
>>  
>>> *Building a runway takeoff* - I cannot seem to set the start point of the 
>>> aircraft for takeoff (maybe it would be good to set a start point 
>>> dynamically when I push takeoff). The start point seems to be the Lat and 
>>> Lon in the flight plan file.
>>> 
>>> I would like to be able to
>>> 
>>> 1. Have a dynamic start point when I push takeoff (or other button)
>>>    
>> You can use the  NavSetWaypointHere() macro to set the waypoint (example in 
>> MOB block in basic.xml)
>>  
>>> 2. Have the aircraft travel down the runway with slight down elevator until 
>>> above minimum speed.
>>>    
>> Use the "throttle" vertical mode:
>> 
>>   <go vmode="throttle" throttle="0.314" from="RunwayStart" 
>> wp="RunwayEnd"pitch="-10"/>
>> 
>> where the pitch attribute should give you some down elevator
>>  
>>> 3. Move elevator to certain up pitch
>>> 4. Fly to waypoint Climb
>>>    
>> Back to standard takeoff
>>  
>>> Is the above possible?
>>>    
>> You will say it !
>>  
>>> How do you keep the aircraft from going off the side of the runway given 
>>> the GPS is not that accurate?
>>>    
>> Try :-) How is directed your front wheel ? You will have to play with the 
>> course_pgain (probably different from the "air" one)
>>  
>>> If it is possible, I have no idea how to do any of the above, could someone 
>>> point me in the right direction?
>>> 
>>> *Runway Landing.*
>>> 
>>> Are runway landings possible with a good degree of accuracy?
>>>    
>> Repeatable automatic landing in a 25x25m square, without barometer, is our 
>> (the historic team) best achievement with a Slayer 
>> (http://paparazzi.enac.fr/wiki/Image:DragonSlayer_0948sm.jpg)
>> 
>> Good luck
>> 
>> --Pascal
>> 
>> PS: Feel free to feed the wiki with your understandings of the system and 
>> your experiment results :-)
>> 
>>  
>>> Kindest regards,
>>> Nathan Aherne
>>> Reddog Technology
>>> Web: www.reddog.com.au <http://www.reddog.com.au>
>>> Email: address@hidden <mailto:address@hidden>
>>> Mob: 0402 555 080
>>> 
>>>    
>> 
>> 
>> 
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