(09-06-2012, 06:35 AM)MiguelM Wrote: Hello, NaN.
First off, good info posted by yourself (also others) in these threads. Very helpful in one's beginning with vDrift.
Secondly, if you have any advices, throw them, they'll be most welcome.
Thirdly, I have yet to read all the documentation and threads, but I was wondering: which version of Pacejka is vDrift using?
Finally, what would you think of a fork for a new tire physics model, called SWIFT?
Thank you in advance.
EDIT:
- going through other threads, you mentioned going back to Pacejka89 to solve one issue.
- may not be necessary a fork, I can work in it privately as there seem to be 2 directions I can follow: a more "physical" approach (similar to what ISI are doing with isiMotor2.5) or this SWIFT approach (which seems interesting).
Do you have access to SWIFT model, data? The only thing I know about SWIFT is, that it is an extended Pacejka to model dynamic effects(rigid ring model?). You will additionally need vertical stiffness, damping?
As to the Pacejka version, 96 maybe? It is using 15 longitudinal, 11 lateral, 18 aligning coefficients.
Personally I'd love to experiment with a more simple model if I had some time to spare:
Coulomb and Stribeck with friction transition region(linear?) at origin. And then parametrize the coefficients(maybe tire load as parameter) and try to fit the tire friction curve from Pacejka.
Anyway, I'd suggest you to create a fork on github.
https://github.com/VDrift
Btw there has been some talk to add tire slip and load damping/filtering, which could maybe count as a crude dynamic model, but mainly to reduce oscillations.
