Normalised Hill force-velocity relation. Velocity is normalised fiber
velocity with negative = shortening (concentric), positive = lengthening
(eccentric).
Usage
forceVelocity(norm_vel, af = 0.25, f_ecc = 1.8, k_ecc = 0.15)
Arguments
- norm_vel
Normalised fiber velocity (concentric < 0).
- af
Hill shape parameter for shortening (default 0.25).
- f_ecc
Eccentric force asymptote (default 1.8).
- k_ecc
Eccentric saturation constant (default 0.15).
Value
Multiplier (0 at max shortening, 1 at isometric, up to f_ecc).