Hi, I'd like to know please how to extract the "dot inflexion" from this program using Matlab software :

%Paramètres

Vin=24;R=10;L=1e-3;C=1e-6;T=1e-6;

c=[1 0;0 1];d=[0;0];

K=300;Vref=20;alpha=1.5e6

%Réponse indicielle

A=[0 -1/L;1/C -1/R/C]

B=[Vin/L;0]

C=[0 1]

D=0

[num,den]=SS2TF(A,B,C,D)

h=tf(num,den)

figure(1)

step(h,1e-3)