pop

This function get asymptotic stable transfer function, k - proportional gain and q - popov slope, and plot the popov diagram.

Couldn't find any function that doing that, So I made this.
create your asymptotic stable transfer function, and then call the function pop with proportional gain k and popov slope q.
notice that it is better to check the K max of the linear system by tools like rlocus, and then choose the k wisely.
the slope q is based on the different situations: time var or not, active or passive hysteresis.,
pop(sys,k,q) will plot the popov diagram, with the K min and K max of the linear system, and the choosen Q on its title.