Vidoe to discuss example : BCAS_JK_7:51 80042020 manke

Dear Students as per your requirement regarding explanation of the example  (above from  book manke). I am uploading this video explaining your few doubts.
 Clarification: Note: Since this is type  1 order system  ( i.e in Den there is 's')   and in this example first corner frequency is   w=2 rad/sec . We can  plote  -20 db/dec for first order sytem till upto only w=2  rad/sec and we can start the plot  any where from any value , that should be less   than w= 2 rad /sec  .       In this example the initial  slope is started from w=1.

Bode Plot (Approximation): Rough idea : Magnitude Vs frequency

Note : In this video  when i am explaining 50 /[(s+1)(s+2)] . Since   to plot bode we need corner frequency  and for this  we have to make N and D as 1+ s. here   in D there is s+2  to make it as 1+s, we devide only (S+2)  by 2 and not ( s+1) which is already in standered  form . When we devide S+2 by 2  , to balance it we will divide 50 by 2 also.
When i am saying N and D divide by 2 means i am dividing only one  D term which is S+2 by 2 and N value 50  by 2 only.

  Take Care

Regarding Assignments

Dear Students   thanks for  sending  assignments. All of  you  are required to  send   remaining assignments on my  email ID  jitenderkumar83@gmail.com instead of my personal ID before or on the given date.


Also mention    "Name -Department- Roll No Sem"  in subject 

thanks for showing interest  

  Stay home , Stay safe

with best wishes
Jitender, BCAS, Dwarka

polar Plot: bcas_JK_polar

Dear students this is  a video regarding polar plot. In the last session of this video, I have equated the real part  Re (G(jw)) = 0 to determine the frequency (here w= sqrt(2))   at which the polar plot intersects the imaginary axis and then put this value in imaginary part to  determined the value of G(jw)  (in this case it is [(4*sqrt(2))/3]at the point of intersection. This video is taken by phone so it's not so clear but i have tried  to do my best with available of limit  number of resources at home.

Hope for  your healthy life.

Stay home, stay safe

Jitender Kumar

How to find G(s) from the Bode Plot Bcas_JK_G(s)

Dear Students if you have any doubts after seeing this video , plz clarify  or ask me to edit and resend again.

best wishes

Jitender

Resonant peak conditions : asked

Conditions  for resonance

Bode Plot: Questions for practice

All students are required to do the practice questions given today and yesterday till coming sunday
If any doubt  plz clarify . You are required to plz follow your reference books.

Q1. Sketch the bode plot and find the stability of the system for the following functions:

1. G(s) = 50/(s+1)(s+2)
2. G(s) = 50/[s^2(s+1)(s+2)]

Q2. Define the following:  (i)  Bode Plot,  (ii) Gain Marging ,(iii) Phase margin

,    (iv) Gain cross over frequency and (v) Phase cros over frequency

Q3  What information you get from Bode's plot.

Q4  State advantages of Bode Plot

Wishes for  your Healthy  life.

jitender, BCAS