Obtaining System Transfer Function from MDL Block Diagram Using MATLAB

First, use MATLAB to draw the system signal transfer block diagram, then extract the transfer function from the block diagram, and finally plot the system’s step response curve.

clear ;[a1, b1, c1, d1]=linmod(‘ex202501’);ss1=ss(a1, b1, c1, d1);tf1=tf(ss1);figure(1);step(tf1);grid on;hold on;num1=tf1.num{1};den1=tf1.den{1};t1=0:0.01:25;x2=20.0*sin(2.0*pi*3*t1);y2=lsim(num1,den1,x2,t1);plot(t1,y2);