At 4/2/02, you wrote:
On 02 Apr 2002 15:45:18 -0500
Sam Varner [EMAIL PROTECTED] wrote:
I'm working on an automotive simulator, http://vamos.sourceforge.net A
while ago, Curt suggested that I try to make my car model work with
FlightGear.
!!
I'd like to start working on that now, but I don't know
where to begin. Could somebody give me some tips on adding a vehicle
model to FlightGear? Thanks.
You might start by looking at the ground dynamics / landing gear modeling
code in the various FDMs (flight dynamics model). In JSBSim this would be
FGGroundReactions.[cpp|h] and FGLGear.[cpp|h]. You should look at YASim
and LaRCSim code, as well, to get the widest exposure to how ground
reactions are modeled.
Off the top of my head, after first being a bit clueless on where to
start, I'd suggest that you ought to be able to get pretty far pretty fast
in JSBSim by merely specifying in a config file an aircraft that had
very poor aerodynamics ;-) Theoretically, this shouldn't be too hard to
get a start with. The same is probably true with YASim, I'm sure Andy will
direct you how to do this with YASim.
I tried this as well. I ended up w/ something that simulated driving on
a frozen lake bed --- a skating rink. But without too much more trouble,
it could work. I think the challenging part is going to be modeling the
suspension system. FWIW: I know that in motorsports people are using ADAMS
to model the system dynamics. This is a commercial product.
One of the problems we face with JSBSim (and which I haven't had time to
deal with, yet) is that ground reactions can be a little tricky. Maybe a
driving sim will pay enough special attention to that aspect of modeling
that you can help us out with your time.
Jon Berndt
Coordinator,
JSBSim Project
http://jsbsim.sf.net
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Prof. Michael S. Selig
Dept. of Aero/Astro Engineering
University of Illinois at Urbana-Champaign
306 Talbot Laboratory
104 South Wright Street
Urbana, IL 61801-2935
(217) 244-5757 (o), (509) 691-1373 (fax)
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http://www.uiuc.edu/ph/www/m-selig/faq.html (FAQ)
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