Gain Margin and Phase Cross over frequency
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- เผยแพร่เมื่อ 5 ต.ค. 2024
- This video clearly explains how to find out the phase cross over frequency and gain margin of a transfer function without plotting a bode plot. If you want to find out how to calculate these from a bode plot, watch this video : • Gain and phase margins...
thank you... you're doing what my tenured professors at the university of southern california, USA cannot: TEACH.. truly helpful and amazing. i will graduate because of your videos
Chase Schidfar I am very glad it was helpful :) All the very best for your exams. Good luck.
Sir you have explained far better then my so called BIg GATE institute , You bring me to the easiest way to find out Gain Margin, Thank you very much, Have a nice day
All the best... Thank you for the kind words..
YES! FINALLY! I was pulling out my hair trying to figure it out from my notes and you clarified it. Thanks a lot, you rule!
Thankyou :) Glad it helped :D
actually i'm Nigerian i like this lecture i have exam next week 10/09/2019
I am glad it was helpful :) All the best !
Also Indian University exm 😚
I have an exam on 17th may n I watch all of ur video's for preparation sir...u r awsm sir...
so, that's tomorrow... All the best :)
Oh men, you are such a Savior. Bless🙏🙏
Thank you. I am glad it was helpful.
I watched this TH-cam video about phase margin and gain margin, but I must admit that I was a bit confused and couldn't fully understand the concepts being discussed. It's possible that the video was intended for a more advanced audience, or the presenter didn't explain the ideas in a way that's accessible to beginners like me.
I also noticed that some people in the comments were applauding the presenter's explanation, which made me wonder if I'm missing something. However, I understand that everyone has different levels of understanding and familiarity with the topic, so it's possible that they had a better grasp of the concepts.
If anyone has any resources or recommendations for learning about phase margin and gain margin, I would greatly appreciate it! I'm eager to learn and understand these concepts better.
@ibrahimabdi -- this is 8 year old video, not likely to get an answer from the TA who has no doubt, found a paying job! These are concepts from a Control Theory class, (call it CT), which Electrical Engineering students must study as a junior or senior in their undergraduate training.
The idea of CT is to move a complex system described by differential equations, out of the time domain, into an imaginary domain -- the frequency domain -- via a Laplace Transform. Or, if you wish to work with a discrete domain, the Z Transform.
My point in supplying these details is to demonstrate that it requires advanced math training to get the big picture of CT.
I wish you the best of luck with your education.
Thank you sir
You cleared my all doubts about this topic.
Glad it was helpful :) Thanks!
Very simple explanation sir thank you very much sirr 😊
A legend among men. thank you
explanation is good
but you should keep the camera stable as it is creating disturbance in understanding
YAY!! THANKS A LOT, have been looking for the step by step procedure for this and now I know it. Thanks again MAN... Keep posting :) Would like to know this step by step process for PHASE MARGIN too :)
Welcome :) Will do on phase margin soon :)
Chinmaya A.S.V when will u give for phase ?
For separating the real and imaginary part, don't we have to rationalize the fraction?
Yes but the result is the same. Multiply both numerator and denominator by the complex conjugate of the denominator and then setting the imaginary part of the resultant numerator to zero you get the same formula.
simply superb sir
lol when he used the calculator to determine 1/sqrt(2) and its output was sqrt(2)/2. All the same, good presentation! :)
Do it for phase margin and gain crossover frequency please.
hello did you find one for the phase margin?
@@omarsinno2774 yes i did, do you need link?
@@UnknownDistraction yes please
@@UnknownDistraction could you please post the link? Would be of great help!
What would you do if the number on the top wasn't 1 though? This is where I am stuck
why not re express it as a fraction in the denominator? Say it was a 2, just put 2/4 in the denominator and multiply through
No he means if in numerator (s+1) exists
multiply with complex conjugate both num. and denum. . Then equate imaginary part of numerator to zero.
Excellent Work. But, do you have video to show how to find phase margin without plotting?
Will upload one soon..
You make very easy topic now thanks 👍
Most welcome :)... It is very kind of you to say so..
It's unreal explaination. I am very much impressed with your provided solutions. Could you please help me resolving following transfer function :
1/s(s+1000)2 . Find GM. where gain coefficient K : 630 x 10 power 6.
Your videos are amaaaaaazing! Very helpful. Thanks! I am a student of Murray State University, KY and I have an exam on 30th of May. Can you please upload a video on lead compensators and lag compensators via root locus? It'll be great!
Please help me....now I am 3 rd year student...I guess u got passed out from b.tech
@@dhonipspk2423
Did u find any helpful videos
My exam is in 24h
shouldn't the imaginary part be obtained by multiplying the denominator and numerator by the conjugate of the denominator? because we can't separate fraction in two fractions, one the imaginary and the other the real part, till the denominator isn't expressed in factorised form and the numerator is an algebraic sum of real and imaginary part
Sanhita Guin it's also correct to do that, try different examples you will see it
Yes, but it wouldn't matter mathematically after rationalization. Same answer both ways.
for gain margin there will be a negation before 20log(kg) formula.
that is up to how do you define kg. here is kg = 1/|L(jw)|. if kg = |L(jw)| then you need minus.
it is very helpfull thank you chinmaya
Thanks Man , Very good Explination
You're welcome!
how about any other transfer function with numerator ? E.G. k(s + 1)
Brilliant, but let the audience know that k = 1 so it is K/1/Kg then -20log(answer) in Db ..many thanks!
Very helpful, thank you! How will I use this to find the phase margin?
You are doing a great job sir how do we find bandwidth and DC gain of a simpler transfer function..thanks in advance
Thankyou so much :) it really helped ,can u please upload how to find phase margin as well
you are awesome..it just cleared my every doubt
Thanks. I am glad it was helpful !
@@ChinmayaASV phone number ... Help me
thank you so much :)) greetings from turkey :)
I am glad it was helpful :) Greetings to you too ! All the best !
i love your video! but how to find phase margin for this question?
hey sir, i really like your way of explanation, i'm just confused about one thing, is the crossover phase frequency the same as the phase margin? if not, pls tell me how to get the latter and thnx
Thanks very much bro..... what if the numerator is not one?
Excelent!! Thank you
thnk u sir....helped a lot.... :)
Just one query: For Phase crossover frequency, you said to equate the Im[G(jw)]=0. But actually you equated the imaginary part of the denominator of G(jw) to 0, i.e, without rationalizing G(jw). So, please clarify you mean to equate the denominator only or the whole rationalized transfer function.
the intersection with real axis needs to be found out,so whole imaginay part needs to be equated to zero
Can i draw bode plot on normal graph if log graph is not given in exam?? But how??
please upload video on phase margin also
how about estimating phase margin with given transfer function??
can u pls post a video on that too.
Absolutely impressive 💓💓
Thank you :) I am glad it was helpful !!!
sirr plss upload video on niquist plot
i like your video
Thank you...Hope it was helpful :)
WOW! THANK YOU SIR
Is it phase cross over frequency or gain margin. That he is finding out
I don't know man 🤔🤔🤔🤔
Thanks a lot for this video......
Sir could u please find for same problem phase margin and Gian cross over frequency
@6.45 while calculating gain margin you have not considered the imaginary part by saying it is zero.. Can you please explain it..
is the phase crossover frequency the same thing as the gain crossover frequency?
Hellll...i am not getting why in finding phase cross over frequency we need to take imaginary part as zero...some1 plz ans
Bcz for finding the value of GM we need help"wpc" w=wpc(phase crossover freq).
Here we take imaginary part of G(s) H(s)=0
how to find out phase margin and gain cross over frequency without plotting bode plot??
awesoooome man thanx alot but i also need the phase Margin if you dont mind
.....^-^
For the phase cross over frequency, why is it required to have imaginary part of the transfer function equal to 0?
THANKS A LOT SIR....
God bless you
Thank you and all the best..
THANK YOU KKINGGGG💕🛰
All the best !
sir upload phase margin video nd one thing more when cross over frequency is 0,then gain margin will be?
Sir what to do when there is not 1 in numerator???
Can you do phase margin please
please add Nyquist plot ...
How Phase margin calculate
how do you do it when you have a zero in the function?
thank you sir
you can't take imaginary part like that that's not right i think
you can't separate fraction by separating the denominator
How can i get the phase margin? Thank you
Thanks dude!
Thankyou sir..
is any similar formulation for phase margin as well?
Thanks Sir !
thank you!! very much!!!
can you give me idea about to find phase margin from TF?
Can't we take w^3=1?
thanks for clearance....
Thanks!
Glad it was helpful :) Thanks!
It was a good video :)!!!
Nice video, nice english
Thank you for the kind words
Thankyou Sir
Explain slow sir and tell clarity its very understand sir
Thank you for the kind words..
Wat happens if imaginary term comes in numerator also..
thanks .
Welcome :)
very good
Help full to me bro
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Why was the function not rationalized before making calculations?🙄
TF must be L(s) = G(s)*H(s) loop TF where H(s) =1.
grt vedio sir
Can Wpc be zero??
You didn't find the phase margin and the gain cross over freq.
Wpc. Y u took IMG part 0
tanks more....
superbbbbb...
What if the gain margin is zero ?
That means nyquist plot crosses negative real axis of L(s) at (-1,j0). Then the system is unstable after 1.
Thak you ♥
Cool but u didnt calculate phase margin
Grt ! onee Thank you !! :)
sir where is phase margin
Thanks buddy
Thanks. I am glad it was helpful !
can someone tell me how do we find phase crossover frequency from this: -3.14= inv tan (-0.5w)-0.1w
im suffering from this aswelllllllllllllllll
Wg ?
c'mon yaar. every engineer knows 1/sqrt(2) is 0.707... Its in our blood. We don't need to check it on calculator.
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