I think it's worth pointing out that in FlightGear cvs we
have models of a jeep and of a snowplow (truck). The dynamics are based on
YAsim and the wheel/suspension modeling seems to work really well. I was
actually very impressed at the sorts of things that YAsim does ... Andy
cooked a little bit of physics magic in there some how! Things I notice
when playing around with the snowplow:
- The suspension at each tire is modeled independently.
- The suspension reacts to surface properties ... like
smooth pavement, rougher grass, etc.
- If you drive into a lake or ocean you sink.
- If you drive off a bridge you dive end over end pretty
realistically.
- When you corner, the individual suspension elements seem
to react correctly. The front outside tire seems to dig in as you turn
sharper and sharper.
- As you corner more and more sharply, you need more power
to maintain the same speed.
- If you turn too sharply, you can actually roll the vehicle
... and visually, it looks very realistic.
- The vehicle reacts to wind.
- There is great interaction between the larger vehicle/body
dynamics, the individual suspension components, and the surface. The
vehicle reacts correctly to slopes and change in terrain. I caught
Sounds like a good topic for a technical paper. The next AIAA Modeling and
Sim conference is in Honolulu.
:-)
Jon
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