Re: [Jsbsim-devel] Problems with autopilot and altitude

[<jj...@gm...>]

You were right. In my script, with a very preliminar analysis of the data,
it seems the speed decreases at the end, and in your script it performs as
expected. I will experiment further and will let you know the results.

Fortunately, the script you attached worked well in my computer. I even
added more autopilot orders to modify the altitude and the commands worked
fine, not like in my script.

Regards

Jorge

On 30/07/06, Jon S. Berndt <js...@ha...> wrote:
>
> > The experiment is listed below and the result is that it really
> > descends to 7000 after maintaining the 8k level, but later on it
> > is not able to gain altitude to reach 8k (file altitude1.png). I
> > tried in the middle invoking the do_trim, but it does strange
> > things (see weird.png). That strange behavior was obtained by
> > invoking do_trim between two set altitude_point in telnet
> > console. The peak is really strange.
>
> I have made another longer run using the C172 autopilot in a scripted run.
> First the aircraft is commanded to 6000 ft, then 4000, then 7000. It seems
> to work well. Here are some plots of the results:
>
> www.jsbsim.org/Time_vs_Altitude.png
> www.jsbsim.org/Velocity.png
> www.jsbsim.org/Elevator.png
> www.jsbsim.org/Theta.png
> www.jsbsim.org/Alpha.png
>
> Here's the script I used:
>