Nyquist Stability Criterion, Part 1
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- Опубликовано: 8 фев 2025
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An explanation of the Nyquist Stability Criterion. This video steps through the importance of the criterion, how to interpret the Nyquist plot graphically, and why it is the way it is. This is the first video in the series on Nyquist plots.
Errata:
Matlab Scripts:
NyDemo.m - The automated demonstration of Cauchy's Argument Principle
docs.google.co...
Interact.m - The interactive demonstration of Cauchy's Argument Principle
docs.google.co...
arrow.m - www.mathworks.c...
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If you have any questions on it leave them in the comment section below or on Twitter and I'll try my best to answer them.
I will be loading a new video each week and welcome suggestions for new topics. Please leave a comment or question below and I will do my best to address it. Thanks for watching!
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7 years after you uploaded this video, in the middle of a pandemic, you saved a uni student from failing his module. Thanks.
*uni students
we out here
hey there
Brian douglas is a saviour to the electrical engineering generation today
+1 in 2022❤
You not only make me understand, but also make me marvel at the beauty of the stuff you're teaching. You are a brilliant teacher! Thank you so much for taking the time out to make these videos and helping us struggling undergraduates with something that can be so simple, but is generally taught in a way that makes the material inaccessible and scary.
Anantika Mehra 😂 😂 😂 I have become Fan of your English 😛
True!
The reason this is so good is because of the example program he made rather than theorems that are very hard to read because they skip all the derivation steps and just say they are trivial and we should do at our own time.
Part two is in my head! I'm working on it now and should have it out within the week. Thanks for watching!
What if the RHS zeros of (1+G*H) are compensated by the zeros of G ?
Than you will not have Poles in the RHS of the closed loop system CLTF = G / (1+G*H)
Is this case even possible?
We need a continuation, this is the most amazing video I saw on this topic! Pls continue working and bringing this kind of insight!
Hi Brian, would you let me know what reference books you recommend?
I LITERALLY CRIED WHEN I UNDERSTOOD IT. ENGLISH ISNT EVEN MY FIRST LANGUAGE SO I HAD TO CONCENTRATE EXTRA HARD . THANK YOU SO FREAKING MUCH
Feeling the exact same way lol, i was starting to get super-anxious about my upcoming exam ;;
@@diamond-Kaz you got this. i actually graduated since writing the comment. i wish you all the luck in the world i believe in you❤
@@hidansektas 💖💝❤️
Just watched 5 hours of university lectures that didn't even come close to explaining the topic with this level of clarity
Sir, you are a Control Systems Theory god. Bless thee for allowing us lowly beings ascend the ladder of knowledge.
you are a lifesaver dude.you made me understand something easily in minutes which i could not understand for hours together
I really like the way you teach. The sound and image are both very clear, and you seem motived when you speak. Please keep making more videos!
Blown away by how clear and concise this video is, thank you!
I not only passed my semester but also grew an appreciation for Control Systems because of your lectures.
Thank you so much!
Nyquist is one of the coolest names i have ever heard of
This guy blows my lecturer out of the water, kudos man!
Why are you so good at explaining?!
In a 17-minute knowledge-dense video, this dude is able to clear up the fundamentals of Nyquist plot that my professor had been struggling to explain in a series of three-week lectures. I wonder why I am paying the tuition to the university but not this guy…
You are an amazing teacher! Thank you so much for making this amazing resource publicly available. You are responsible for many engineering students developing a real understanding of important stuff
You're an absolute legend, I failed my summer exam in control and I have my repeats in 4 weeks. Your vids are saving me, and I think I'm finally getting the concept of CONTROL. I wish you the best in life, sincerely.
You helped me grasp control theory like never before. I now think like a control system engineer.
Brian, your dedication to teaching is truly appreciated. Just as scientists advance knowledge, educators like you ensure its transmission.
Thank you for your invaluable contribution.
I'll be another drop in the bucket when I say this, but I have to say it. This video is phenomenal. All of your videos that I've watched so far are amazing. I think you're the reason I will pass my control systems course. Thank you for your work.
From basic to the top
always the best lecture series :D
My god, I owe you my life man LOL
This video saved my day
阿修是你ㄇ
You must understand that you have a unique gift of God that you can explain things so purely. I feel enlightened by the level of insight you present. Thank you, Sir.
The best explanation of the Nyquist plot. I gave up this topic but thanks to you now I can imagine what is the Nyquist plot and why it even exists. thanks, man.
Hey man, just wanted to say your online classes are worth 10 of my brain-shrivelling books, I wish I had a teacher like you for every class!!
Keep it up, you make all of our lives so much easier!
This is the best series of starting to learn control theory on youtube ! Thank you very much for your time and effort!
This series is fantastic. I wish more people who taught Controls could communicate the concepts as effectively as you do in your videos. Keep up the great work!
OMFG, I really, really enjoy the way you explain. I know there are too many people who are not from an English speaking country and watch your videos, just like me! Regards from Argentina
You are a Hero. If they could just fire the lecturer and put your videos in a playlist instead the pass rate would skyrocket.
Geesh.... You are such a good teacher, that made understanding Nyquist stuff so much easier
This video saved me and the midterm I have to take tomorrow :)
Amazing! The reader for my system control class dedicated a whole 400-orso words to Nyquist diagrams... So I am glad to have found someone explaining it to this degree of clearness!
Brian, you have the ability to make all control system theory interesting!
I clicked here by accident but stayed because it sounded so interesting. Literally had 0 knowledge of the topic at hand, but you were such a good teacher that I feel like I learned something anyway haha
I spent days on nptel and I finally found this lecture, thank you..
7 years later and still an awesome video. Thanks man.
Watching your videos just two nights before my finals. Many thanks!! it's great to hear such a great explanation to this subject
I may have failed the first time taking Control Systems class, but this second time with your videos I'm passing. :) Thank you, Brian. You da man!
Before learning the maths behind a topic, its very helpful for a teacher like you to explain the reasoning and overall picture of whats going on. I feel my knowledge is incomplete without watching your videoes. Thanks for the great work!
Thanks alot, Nyquist criterion was a topic I hated because of lack of understanding, I tried many resources including some reference books, but I didn't understand it. Now because of your beautiful explanation, not only that I understood it really well, I could appreciate the beauty of the concept, thanks again
I've been wondering about this for a solid 6 months and it's so much clearer now. Thanks !!!
Absolute legend, you deserve an honorary PhD for these beautiful videos!
watching only 2 or 3 videos had made me a great fan of yours
doing a great job,ecstatic to find you on youtube.
wah....was having so much trouble with Nyquist and this one video (well ofcourse with some previous knowledge of the Nyquist plot) clears most of the things! great work Brain!
You are a living legend.. thanks for such an amazing video!! Seriously helped a lot. - Undergraduate student from South Korea -
This really ties everything together into one clearer picture. Much appreciated!!
i learned more from this 15 minute video than a 2 hour lecture I just had
Same here
You are a genius man!!! I was never going to understand about the control module without you! Thankyou..
U save my final exam, I love u.
The best teacher i have ever seen
I have an exam in 2 hours and I am watching this now. Thank you so much for making me understand what I am even learning.
Sir, OMG. You made my life easier!. I was awestruck when you showed the nyquist plots in matla. It makes so much sens e now. Thanks a ton!
Brian, you are the best one. Please, make a video about state space control. The world needs it!!!! Thaaks.
Yes please!!!!!
Congratulations! Now Nyquist theorem is comprehensible.
I read Ogata and Nise sometimes about Nyquist but this video helped me more. Thanks a lot and keep with the excellent work.
Awesome explanation of the so smokey Cauchy Argument principle that most text books fail to explain, making it impossible to grasp the real thing! Even 20 years ago when i studied this at the university they gave us quite a smokey explanation compared to this one. Great job! Thumbs up!
these videos are literally saving me this semester. thank you!!
sem savers
thanks for the explanation
, you are one of the best youtubers on this area!
You should run for president! you have a gift at breaking down complicated ideas and explain them so easily to the common man!! hahaha
Best lectures on control system in whole you tube
Absolutely amazing videos. I have understood far more through this 17 min video that i have in an entire semester that spans 5 months. Thank you very much.
I'd like to take the time to sincerely thank you for preventing me from failing my control systems course this term.
I learn more from youtube than I did from undergrad and grad school :| Thanks @Brian for making this series.
Man, this man is better at explaining than my uni professor.
Thank you very much!
Control Systems has become my favourite subject because of you. Thank you! :)
I have a final exam of Control Systems next monday and this helped me a lot to better understanding Nyquist Criterion. Thanks a lot! I subscribed btw
Thank you so much, maybe these are the only videos with a good explanation of the theme. Nice job :)
Wow first time I supported a youtuber on patreon. Keep-up the good work
Fantastic demonstration , the Matlab simulation really helped !
Wow! Amazing. I am speaking for everyone when I say could you upload the 2nd part because we all love you and need these videos in our lives. You should be paid for what you do!
This content is unbelievably good!
Brian! YOU are sick man... so good, most clearly explained video ever watched on youtube!
Was way interesting then my lecture You saved the day.
I have placed the two scripts I wrote in Google docs and placed the link in the description.
I have not modified the existing Nyquist function in Matlab ... it was just a bit of movie magic! After the plots came up I modified them a little by making the lines thicker and such so it's easier for you guys to see. I just edited that part out.
I had no interest in controls until I saw this playlist. He is a pro in explanation.
You are best teacher, So I am the best student....actually We all are......& it's hard to find someone like you....Thanks for everything
Today I just skipped my lesson in Modern Design of Control System, because i didn't understand the previous ones about Nyquist, so it wouldn't have been useful going to lesson today.
Thanks to you, maybe I can go to the next lesson!
Love u man
Control Systems is so much understandable thanks to your videos, I greatly appreciate it!
Ms. Braian you are such a brilliant engineer
So clear dude. You are the Man Brian. Infinite thanks to you Sir!
I don't knowif your explanation is right or wrong, but I know it's awesome, I don't know why teachers whom I pay lots of money don't explain things like you do. Big like and all the best with your book Brian.
Brian, you are a funny guy, especially when you expressed your amazement graphing 2 Nyquist plots
You're awesome, in addition to a great lecture you provide great tools (matlab files)
Thanks for sharing the matlab code and for the explanation on how you got such a nice Nyquist plot.
how in the hell can anyone dislike these videos! these are amazing!
Thank you! These tutorials have really helped me in learning control engineering!
Thanks for making these videos, Brian. I'm laid-up right now with a broken ankle, so I'm diverting some of my couch and raised-foot time to these lessons. You're really good at driving home the concepts.
Just an idea: As a recent EE graduate, I'd like to see a video where you design a simple controls system or model or whatever, but without regard to a generic student. Just a straight-forward, "thinking outloud" version of you working through a problem. Just an idea.
You've almost saved my life, no words can describe how grateful am I. If you can add some videos about z transform & discrete systems control it will be awesome because my teacher sux :D.
Really nice videos (part 1 and 2). They help a lot to get an intuitive understanding of the topic.
Your videos are so easy to understand. Amazing work. I'll be buying your book when it comes out
I came to your channel like a year ago to study bode plots and it was so good I subscribed, today i was seraching for nyquist plots and not only you were once again flawless in your explanation but I also found the control theory map that my teacher used to present the module. You are influencing both students and teachers around the globe, thank you very much and greetings from barcelona!
I am also waiting for the second part very anxiously.Exams are coming soon and this is just what i need.
This is amazing! Loved your Matlab examples!
I'm electronics engineering student and I have to say that because of your tutorials even my smartest control&automation mates at the college will lack the understanding I'm getting here of this basic stiff material..!
No one cares for math as it's pure interference with the core of engineering even those elder professors. even if I fail the final for second time, I'm extremely interested in watching this course.
Hope you make more content on different areas of "practical control" like microcontrollers and so on.
Greetings! 💘
Thank you so much! I had already given up on understanding the logic behind Nyquist but now everything makes sense!
I have yet to come across an explanation of this topic that is as clear and intuitive as these videos.
This video is a masterpiece. I had to watch it many times but I have learned a lot! Thank you very much sir, you are awesome
extraordinary ..Really takes a lot of effort to assemble all these heavy concepts at one place....thanks :)
A very Good lecture with a nice pace .Thank you.
you've just saved my engineering carrier , thx bro.
You are an absolute legend sir !
Thank you, you just saved my final exam!!!