Dear Christophe
Thank you for the informative reply.
But I think I am still missing
something.
When you say "I would say: if the wind comes close to your cruise speed....
you should set it prior to takeoff"
Do you mean set the flags such as:
ap.CFLAGS += -DNAV -DAGR_CLIMB -DLOITER_TRIM -DWIND_INFO
-DSTRONG_WIND
ap.srcs += nav.c fw_h_ctl.c fw_v_ctl.c
or something else?. And if the wind is low remove
the flags?
Regards
Stephen
On Wed, 28 Jul 2010 22:16:27 +0200 Christophe De Wagter wrote:
Dear Stephen,
The wind.xml is redundant as the wind parameters are always present in the
gcs - settings - flight parameters.
Procedure for strong winds:
I would say: if the wind comes close to your cruise speed.... you should
set it prior to takeoff. In practice we never set it but always start with at
least 1 standby circle.
Without the "strong wind" procedure when the ground speed
becomes zero or negative (e.g. when you climb, that reduces your groundspeed),
the MAV keeps turning even when the nose is pointing in the right direction and
hereby is blown away. The strong-wind procedure is no miracle but
simply adds the estimated wind to the ground speed when estimating angles. Even
if the wind estimation is not accurate but just points in more or less the
correct quadrant, it makes a huge difference. When the groundspeed becomes close
to zero, the strongwind function reduces the nav gain (as a small heading
difference makes the plane move laterally which is seen as a (huge) 90
degree error, while the real heading error is only a few degrees). When the
ground speed becomes negative, the strongwind function uses the estimated
heading instead of the ground track. This enables you to fly backward. Using the
formation flight routines in paparazzi you can make a "hovering controller" for
planes.
Success.
On Wed, Jul 28, 2010 at 12:12 AM, Stephen L Hulme
<address@hidden>
wrote:
Hi Everyone
Re: Camera:
I have a similar software problem with a Canon
IXUS 80IS and CHDK.
Following a very kind donation from John Stowers
of a Booz main, IMU and power board I have successfully launched a 40cm MK
quadrotor.
I wish to carry the mentioned cradled
Canon camera and remotely trigger still shots using the USB remote
configuration.while simultaneously transmitting video over a 5.8 GHz
transmitter.
To date I am having great difficulty getting the
video to display beyond three minutes without the default script appearing on
the video image.
Any help with a working script would be
appreciated.
Pascal previously indicated in a PM that one of
Antoine's quadrotors was running this setup.
Re :Wind
After crashing my Funjet last summer I came back
to test my old the airframe.xml code for a rebuilt version and found the
settings file wind.xml has been removed.
Christophe De Wagter maybe you could kindly set out the proper procedure
to run the strong wind function?
Regards
Stephen