Ecuaciones de los modelos:
Tamiya
$$\mu = \dfrac{\mu_{max}\cdot I}{I_k+I}$$
Molina
$$\mu = \dfrac{\mu_{max}\cdot I^n}{I_k^n+I^n}$$
Bannister
$$\mu = \dfrac{\mu_{max}\cdot I}{\left(I_{kb}^n+I^n\right)^{1/n}},\quad I_k=\dfrac{I_{kb}}{(2^n-1)^{1/n}}$$
Van Oorschot
$$\mu = \mu_{max}\left(1-e^{-I/I_{kv}}\right),\quad I_k=I_{kv}\ln 2$$
Camacho-Rubio
$$\mu = \dfrac{\mu_{max}\,I}{2\alpha}\left[1+\kappa+\dfrac{\alpha}{I}-\sqrt{\left(\dfrac{\alpha}{I}+\kappa-1\right)^{\!2}+4\kappa}\right]$$
Steele
$$\mu = \dfrac{\mu_{max}\,I}{I_{max}}\,e^{\,1-I/I_{max}}$$
Aiba
$$\mu = \dfrac{\mu_{max}\,I}{I_k+I+I^2/K_I}$$
Camacho CR*
$$\mu = \dfrac{\mu_{max}\,I}{2\alpha_f}\left[1+\kappa_f+\dfrac{\alpha_f}{I}-\sqrt{\left(\dfrac{\alpha_f}{I}+\kappa_f-1\right)^{\!2}+4\kappa_f}\right]$$
$$\alpha_f=\alpha(1+\delta I^n),\quad\kappa_f=\kappa(1+\delta I^n)\quad(A'=1)$$