Having been there done that, to use FG as as SA for your AV, use the
telnet interface. Examples from many languages are in the CVS drop
under source/scripts area. Then just enable the "--telnet" and
"--httpd=" options. Browse the data items you need to set via the http
interface, then just map from your datset into the dataset for FG.
On Mar 25, 2005, at 10:28 AM, Curtis L. Olson wrote:
Jeff McBride wrote:
I am looking into the possibility of using FlightGear as a simulator
to test flight control software that I am developing for a UAV
(Unmanned Aerial Vehicle) project. The idea is that I will take
control values (ailerons, throttle, etc) from the telemetry link and
pass them to FG, then take the resulting location, speed, etc. from
FG and pass it back to the UAV as if it were coming from the on-board
GPS.
From what I can tell, FG has support for this kind of thing, but no
documentation of it. So, my question for the experts is what is the
best way to do this? I was going to try to use the "generic" network
interface, but as far as I can tell it doesn't support a
bi-directional link. Perhaps I can run two of these (one in, one
out), but is there a better way I should be looking at? There seem to
be a lot of options.
Of course, my next problem will be creating a model of the plane I am
flying, but I am waiting until I get there to tackle that one.
Have a look at docs-mini/README.IO for starters. You can pass control
inputs into FlightGear by creating an FGNetCTRLS
(src/Network/net_ctrls.hxx) packet and sending it over to FlightGear.
You can then have FlightGear send back an FGNetFDM packet
(src/Network/net_fdm.hxx) which will include all the position,
velocity, orientation type data. Yes, you'll eventually have to
create a model of your airplane, but you can certainly iron out all
the interface issues while using an existing aircraft model. I don't
know how well our FDM engines scale to R/C or UAV scales, but I'd
think with some fiddling around you could get something to work. I'm
an R/C pilot myself, and involved in a UAV project here at the
University of Minnesota, so I'll be interested to hear what you come
up with.
Regards,
Curt.
--
Curtis Olson http://www.flightgear.org/~curt HumanFIRST Program
http://www.humanfirst.umn.edu/
FlightGear Project http://www.flightgear.org
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