% simulink
A1=4;
A2=5;
g=9.81;
Aw1=0.5;
Aw=0.5;
figure(1)
plot(out.tout,out.G)
% model kupfmullera
k2=0.204;
T21=5.04;
tau2=1;
T22=T21-tau2;
G2=tf([k2],[T22 1]);
figure(2)
step(G2, 'r')
% zestawienie
figure(3)
plot(out.tout,out.G)
hold on
step(G2, 'r')