Re: anti-roll bar model suggestions

Hi Christos

> Recently on the TRB it has come to light that the simuv2 and simuv3
> anti-roll bar models are slightly different.

> Im simuv3, the anti-roll-bar uses a limit on the force applied through
> the bar, implemented via the anti-roll-bar course (xMax). However, in
> simuv2 the anti-roll-bar suspension course plays no role whatsoever. I
> think this makes more sense, actually.

I removed all parameters from the model but the "spring". The other parameters
just scale the result and waste performance, so I threw these out of the model.

The roll bar model does simply transfer "force" proportional to the suspension
lenth difference from one side to the other, thats it (exactly what a real fixed
installed anti rollbar does when he operates on "Hookes" range of the material).

> 1) 4th power model (corresponds to the tension of a stiff metal rod, so
> is probably the most realistic)

Does not matter, finally it is just a torsion spring again, for little angles it
is just a spring (correct me if I got this wrong, phi*springconst=momentum, and
sin(x) ~ x for small phi, so the moment of inertia just ends up in the spring
constant as constant).

> 2) piecewise 2nd power model: linear until xMax, then quadratic
> 3) piecewise linear model with 'play': no force until xMax, then linear,
> with no upper limit,
> This seems relatively realistic, since most such mechanical systems have
> a bit of play.
> 4) make it an option! (complicates things for drivers)

I think you cannot feel the difference, so it does not make sense.

> tangent: a lot of options in torcs sim right now are implemented via ifs

Tangent, what are you talking about?

Bye, Bernhard.


------------------------------------------------------------------------------
Check out the new SourceForge.net Marketplace.
It is the best place to buy or sell services for
just about anything Open Source.
http://p.sf.net/sfu/Xq1LFB