PiBoSo Official Forum

World Racing Series => Cars => Mods => Physics => Topic started by: Torque on November 13, 2015, 01:32:09 PM

Title: Tyre file parameters
Post by: Torque on November 13, 2015, 01:32:09 PM

Hello, can anyone help me understand what the values shown below are used for in the tyre file?

Thanks,
Torque


R0 = 0.300000
Fz0 = 1000.000000
p_Cx1 = 1.600000
p_Dx1 = 1.650000
p_Dx2 = -0.100000
p_Ex1 = 0.000000
p_Ex2 = 0.000000
p_Ex3 = 0.000000
p_Ex4 = 0.000000
p_Kx1 = 30.000000
p_Kx2 = 0.000000
p_Kx3 = 0.000000
r_Bx1 = 12.000000
r_Bx2 = -10.000000
r_Bx3 = 0.000000
r_Cx1 = 1.200000
p_Cy1 = 1.200000
p_Cy2 = 0.600000
p_Dy1 = 1.650000
p_Dy2 = -0.100000
p_Dy3 = 0.000000
p_Ey1 = 0.000000
p_Ey2 = 0.000000
p_Ey3 = 0.000000
p_Ey4 = 0.000000
p_Ey5 = 0.000000
p_Ky1 = 20.000000
p_Ky2 = 1.000000
p_Ky3 = 0.010000
p_Ky4 = 0.000000
p_Ky5 = 0.000000
p_Ky6 = 3.000000
p_Ky7 = 0.000000
r_By1 = 7.000000
r_By2 = 4.000000
r_By3 = 0.000000
r_Cy1 = 1.050000
r_Hy1 = 0.000000
q_Bz1 = 9.000000
q_Cz1 = 1.100000
q_Dz1 = 0.100000
q_Dz8 = 0.100000
q_Ez1 = -10.000000
s_Sz1 = 0.000000
Title: Re: Tyre file parameters
Post by: RiccoChicco on November 13, 2015, 02:40:11 PM
Those values are those from the Pacejka Magic Formula. You can see a lot of examples on the web, even though I've never really looked at the PiBoSo's integration precisly.

Here's a interesting reading if you have a bit of knowledge in dynamics :

Download (http://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&ved=0CGgQFjALahUKEwie1ov7zo3JAhWBDhoKHRUFBO0&url=http%3A%2F%2Fpurl.tue.nl%2F677330157969510.pdf&usg=AFQjCNG75CDcFS52hRzCX1Zqy8vLCDfAuQ&sig2=FO5xvsSimI5PWBwS7_HmNQ&cad=rja)

Title: Re: Tyre file parameters
Post by: HornetMaX on November 13, 2015, 03:11:19 PM
As Ricco said. The complete description is in Pacejka's book "Tire and Vehicle Dynamics".
Title: Re: Tyre file parameters
Post by: C21 on November 13, 2015, 04:16:08 PM
QuoteThose values are those from the Pacejka Magic Formula.
They are based on them but not entirely the same.
Title: Re: Tyre file parameters
Post by: HornetMaX on November 13, 2015, 04:56:01 PM
Quote from: C21 on November 13, 2015, 04:16:08 PM
QuoteThose values are those from the Pacejka Magic Formula.
They are based on them but not entirely the same.
Which differences do you see ?
Title: Re: Tyre file parameters
Post by: PiBoSo on November 14, 2015, 09:00:05 PM
Quote from: Torque on November 13, 2015, 01:32:09 PM

Hello, can anyone help me understand what the values shown below are used for in the tyre file?

Thanks,
Torque

The tyre model used is Pacejka Magic Formula.
A tool to edit the parameters will be released as soon as possible.