s = tf('s');
tau1 = 1;
tau2 = 0.5;
T1 = 0.2;


F1 = 1/s;
impulse(F1)
hold on;

F2 = 1/(tau1*s + 1);
impulse(F2)

F3 = 1/(s*(tau1*s + 1));
impulse(F3);

F4 = (T1*s + 1)/(tau1*s + 1);
impulse(F4);

F5 = 1/((tau1*s + 1)*(tau2*s + 1));
impulse(F5);

F6 = 1/((tau1*s + 1)*(tau2*s + 1)*s);
impulse(F6);
hold off;

