Re: [Paparazzi-devel] Maximize climb rate after take-off

[Famille Chateauvieux-Hellwig]

Hi Steven
do you have a Pitot or another airspeed sensor?

Martial

Le lundi 11 mai 2009 08:24:53 Steven Wawryk, vous avez écrit :
> Hi Pascal,
>
> For example, the MicroPilot autopilot allows the use the following
> alternatives:
>
> * airspeed from throttle and altitude from pitch
>
> * altitude from throttle and airspeed from pitch
>
> depending on which of altitude or airspeed is to be most tightly controlled
> in the current mode.
>
> In my case, throttle is set to max to increase altitude as quickly as
> possible.
>
> Cheers,
> Steve
>
> address@hidden wrote:
> > Hi,
> >
> > If you don't set nor a climb rate (vmode=climb) neither an altitude
> > (vmode=alt), what do you want to control with pitch=auto ?
> >
> > --Pascal
> >
> >
> > ----- Original Message -----
> > From: "Steven Wawryk" <address@hidden>
> > To: address@hidden
> > Sent: Monday, 11 May, 2009 04:19:36 GMT +01:00 Amsterdam / Berlin / Bern
> > / Rome / Stockholm / Vienna Subject: [Paparazzi-devel] Maximize climb
> > rate after take-off
> >
> >
> > Hello,
> >
> > I'm working with David Bryant on the compressed air cannon launched
> > system.
> >
> > What I would like to be able to do in the flight plan is to go into a
> > maximum climb rate mode straight after launch until a given altitude is
> > achieved.
> >
> > What I'd like to be able to do is something like:
> >
> > <attitude roll="0.0" pitch="auto" throttle="1.0" vmode="throttle"
> > until="estimator_z >= ground_alt+security_height"/>
> >
> > the aim being to use pitch control at maximum throttle to achieve a given
> > airspeed set-point.
> >
> > I'd rather not have to set the pitch or climb rate because then I'm just
> > guessing what airspeed it will go at.  Too low and it will stall, too
> > high and the higher drag means it won't climb as fast as it could.
> >
> > The problem is that the flight plan build doesn't allow auto-pitch with
> > throttle vmode.
> >
> > The other vmodes don't seem appropriate, and with the default alt vmode,
> > the build also fails because an alt attribute is needed.
> >
> > If I set the alt attribute, I'm not sure how it will behave.
> >
> > Is there a reason for prohibiting auto-pitch with throttle vmode?
> >
> > Does anyone have any other ideas?
> >
> > Thanks,
> > Steve
> >
> >
> >
> > _______________________________________________
> > 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
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel