Desinging a very basic 1st order integrator with the continous transfer function:
$H(s) = -1 / (0.001 s)$ [No zeros, one pole at origin]
I was expecting the unit step response to be positive-slope. However in my Python code I get a negative slope.
num = (0 , -1) den = (0.001 , 0) Hs = sig.lti(num,den) t, s = sig.step(Hs) plt.plot(t,s)