I'm wondering if someone here is modelling Fx/Camber ... there's
nothing about camber in longitudinal Pacejka... but I think that's
plain wrong and Fx should decrease with camber...
Shouldnt it?
Question 2:
Any good links or SAE papers about brakes/temperature relations?
Thanks...
Hm, perhaps yes. You'd say with a lot of camber Fx would surely
decrease, since the contact patch gets smaller (less wide).
But perhaps wasn't big enough to add to Pacejka? (hm, lots of tiny
things go into Pacejka, so you would say camber would be at least of
the same importance as many other coefficients).
I have no idea. However, I'd say it's a matter mostly of raising
temperature and lowering it based on braking power, where the relation
is quadratic (since we're dealing with an area, not really a volume
and certainly not a line).
So what I want to do in the future is:
- float tempRiseCoeff, tempFallCoeff
- float brakeDiscArea
- float tempCoeff
And then do some juggling like:
steadyStateTemp=brakingApplication*tempCoeff
if(temp<steadyStateTemp)
temp+=tempRiseCoeff*brakeDiscArea^2*brakingApplication*dt
else
temp-=tempFallCoeff*brakeDiscArea^2*(1-brakingApplication)*dt
Sort of like that, being creative as I write. :)
Ruud van Gaal
Free car sim: http://www.racer.nl/
Pencil art : http://www.marketgraph.nl/gallery/
I've found some stuff on a racing brake reseller about optimal
temperature... I'll try to use that...and be..hmmm.. creative..hehehe
I've learned how they check for brake temperature... with a special paint to
apply to the brakes! That's fun...
> >Hi guys,
> >I'm wondering if someone here is modelling Fx/Camber ... there's
> >nothing about camber in longitudinal Pacejka... but I think that's
> >plain wrong and Fx should decrease with camber...
> Hm, perhaps yes. You'd say with a lot of camber Fx would surely
> decrease, since the contact patch gets smaller (less wide).
> But perhaps wasn't big enough to add to Pacejka? (hm, lots of tiny
> things go into Pacejka, so you would say camber would be at least of
> the same importance as many other coefficients).
> >Question 2:
> >Any good links or SAE papers about brakes/temperature relations?
> I have no idea. However, I'd say it's a matter mostly of raising
> temperature and lowering it based on braking power, where the relation
> is quadratic (since we're dealing with an area, not really a volume
> and certainly not a line).
> So what I want to do in the future is:
> - float tempRiseCoeff, tempFallCoeff
> - float brakeDiscArea
> - float tempCoeff
> And then do some juggling like:
> steadyStateTemp=brakingApplication*tempCoeff
> if(temp<steadyStateTemp)
> temp+=tempRiseCoeff*brakeDiscArea^2*brakingApplication*dt
> else
> temp-=tempFallCoeff*brakeDiscArea^2*(1-brakingApplication)*dt
> Sort of like that, being creative as I write. :)
> Ruud van Gaal
> Free car sim: http://www.racer.nl/
> Pencil art : http://www.marketgraph.nl/gallery/
> >Hi guys,
> >I'm wondering if someone here is modelling Fx/Camber ... there's
> >nothing about camber in longitudinal Pacejka... but I think that's
> >plain wrong and Fx should decrease with camber...
> Hm, perhaps yes. You'd say with a lot of camber Fx would surely
> decrease, since the contact patch gets smaller (less wide).
> But perhaps wasn't big enough to add to Pacejka? (hm, lots of tiny
> things go into Pacejka, so you would say camber would be at least of
> the same importance as many other coefficients).
> >Question 2:
> >Any good links or SAE papers about brakes/temperature relations?
> I have no idea. However, I'd say it's a matter mostly of raising
> temperature and lowering it based on braking power, where the relation
> is quadratic (since we're dealing with an area, not really a volume
> and certainly not a line).
> So what I want to do in the future is:
> - float tempRiseCoeff, tempFallCoeff
> - float brakeDiscArea
> - float tempCoeff
> And then do some juggling like:
> steadyStateTemp=brakingApplication*tempCoeff
> if(temp<steadyStateTemp)
> temp+=tempRiseCoeff*brakeDiscArea^2*brakingApplication*dt
> else
> temp-=tempFallCoeff*brakeDiscArea^2*(1-brakingApplication)*dt
> Sort of like that, being creative as I write. :)
> Ruud van Gaal
> Free car sim: http://www.racer.nl/
> Pencil art : http://www.marketgraph.nl/gallery/
delta_U = variation of internal nrj
Q = heat
W = work exchange
delta_U = W + Q
C = dQ / dT ( J.K-1 )
c = 1/m . dQ / dT ( J.kg-1.K-1 )
Some value of c ( J.kg-1.K-1 )
Water : 4,1855.10^3
ice : 2,1.10^3
steam : 1,9.10^3
Aluminium : 0,92.10^3
Iron : 0,75.10^3
Air : 1.10^3
for more information search for
Thermodynamic ( Thermodynamique in French )
Calorimetry ( Colorimetrie in French )
have fun ;)
Sebastien TIXIER - Game Developer
Dynamics and Car Physics
http://www.eden-studios.fr
GPLRank Normal:-44.24 Monster:-124.44
