Experiment No. 9

Object: Check for the stability of a given closed loop system.

Program coding:

clear

clc

num=[16];

den=[1 2 16];

h=tf(num,den)

nyquist(h)

program output:

Transfer function:

      16

--------------

s^2 + 2 s + 16

We get the nyquist plot of a given second order transfer function

Result: Thus we have successfully studied for checking the stability of a given closed loop system

 Experiment No 10

Object: Plot bode plot for a 2nd order system and find GM and PM.

Program coding:

clear

clc

num=[16];

den=[1 2 16];

h=tf(num,den)

bode(h)

program output:

Transfer function:

      16

--------------

s^2 + 2 s + 16

We get the bode plot of a given second order transfer function

Result: Thus we have successfully studied bode plot for a 2nd order system and find GM and PM.