Hello , I have assumed that my tyre model obeys to a differential first order equation as follows :

dFij/dt = tau*(-Fij(t)+Fij_0(t))

with i = x,y(longitudinal,lateral) and j = f,r (front, rear) wheels and Fij_0 is an empirical quasi-static model of tyre force (dugoff,pacejka...) In my case I identified this force to dugoff model with a set of input-output measurements.

I don't know how to determine the tau coefficient knowing that I am considering lateral and longitudinal dynamics.

Thank you.

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