Hi Rainer, thank you very much for the explanation! I'll try my luck with the Pac2002 model. If I get around to validating the car and tire models after the season, I may come back here and report on our results.
Sincerely, Thorsten [email protected] schrieb am Samstag, 6. Januar 2024 um 15:38:55 UTC+1: > Hi Thorsten, > > the MFTire class was a c++ port of the Matlab tool. It contained a lot of > features, nearly all proposed bei Hans Pacejka in his book. The original > authors know, that many of these features or not used by anybody. They made > analyses of the commercial MFTire solutions used e. g. in ADAMS for this > and privided a switch to deactivate those features. We decided not to > maintain code that nobody ever is going to use, that is the main reason to > drop c++-MFTire as tire model in chrono. The c++ port was extremely buggy, > that showed a test a test with a validated vehicle model (Fed-Alpha) > equipped with validated Pacejka 2002 tire files (donated by Goodyear). Btw. > our former Pac02 model worked well with it! We decided to rewrite it yet, > to give it a more readable structure and to implement a parser for > ADAMS/Car compatible *.tir files. It should be easier to use now. > > We definitely don't have all possible functions implemented. Only steady > state and combined forces can be used. Inflation pressure dependent data > sets can be probably used but have not been tested, because we don't have > validated example files for it. So if you have fitted tire parameters for > your race car, you should Pac02 in chrono give a try. > > Best, > Rainer > > [email protected] schrieb am Freitag, 5. Januar 2024 um 23:12:01 UTC+1: > >> Hi all, >> >> I am currently trying to simulate a racing car in Project Chrono. As such >> the tire simulation is very important to me. I fitted a magic formula v61 >> model to my experimental data and while browsing through the pull requests >> I found that there is/was a MFTire class for the versions 61 and 62 of the >> magic formula in Chrono. Since I didn't find this code in the current main >> branch I did a little deep dive and found out that the corresponding class >> was deleted in 4f7c0ea8f6b10896459c1867551858706f083632 on the 8th of June >> 2023 in the process of reworking the Pacejka2002 tire. I was a little >> confused by this since I thought that the MF version 61 and 62 are way >> newer than 2002 (imo 2008 atleast). Therefore I wanted to ask whether the >> Pac2002 tire contain all the formulas for the current MF versions or what >> the process was behind removing this class. >> >> Sincerely, >> Thorsten >> > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/d5693e0b-d260-4bd6-b29f-6d9f83af20d5n%40googlegroups.com.
