Sketching Root Locus Part 1

[@jacquesvanniekerk6817]

You are the reason many future engineers pass control systems and receive their degrees. Please keep up the good work!

[@wellesleyful]

YUP

[@li-pingho1441]

agree

[@lmd168]

Some of the lecturers from my University does NOT deserve their salaries. Thank you.

[@esvna]

+Lester H They get paid mostly for the research they do not how they teach. Most universities dont care about their profs teaching abilities.

[@ffalkr]

if i happened to be a lecturer of this subject then i'll just show this channel to my students and enjoy my salaries lol

[@Cplusplus745]

Are you talking about india?

[@jerikah8397]

"Each open-loop pole has its open-loop zero friend and they draw a path between the two. And if a pole or a zero doesn't have a friend then they go off to infinity searching for them." - Brian Douglas idk why but feelsss

[@riyadrahman9844]

he got me there too 0.0 .....poetic fucking engineering tutorial *.*

[@TheSweBoo]

LOVE IT SO MUCH

[@Edge9404]

Teaching done right. People learn so much more easily with examples like these

[@tanmoysaikia6086]

That one single line got me though

[@xlmentx]

poor guys, forever searching for a friend. so sad D;

[@BrianBDouglas]

One of my favorite controls books is "Control Theory Second Edition" by JR Leigh.  There are a lot of great books that describe the theory and show you the math, but this book explains most of the concepts in words. I think engineers can get a good understanding of "why" the theory as opposed to"what's" the theory from this book.

[@mostafaelshafie4550]

you are a legend, you make this very easy. are you a practicing engineer?

[@mostafaelshafie4550]

can you post the notes you used in the videos so we can use them to study?

[@tingyialessandrolorigiano4044]

Hey Mr.Douglas, thank you so much for this textbook recommendation (& all of your lectures of course). You are a real G

[@drumphil101]

This channel has genuinely made me want KZbin to implement a "Buy this guy a beer" button. Your videos are all so damn straightforward to understand, and you've taught me more in two days than I've managed to understand from 19 hours of lectures on the subject. Thank you so so much.

[@snoopyboop4375]

I've been trying to understand root locus sketching for hours and this video made me understand it better than one whole semester of lectures

[@VermillionsX]

took 14 minutes on here to understand this compared to 32 lectures from a PHD of 22 years lol

[@dghgfhjgnxdgfhtfyuiy]

loool same here

[@TheBirdMan]

Colin Cassidy Exactly !

[@oversoulzzz91]

Colin Cassidy exactly!!!

[@EdgarPoe_Raven]

Same!!!

[@ygs6450]

I'm so glad i can find this video before i study that much!! thanks brian

[@sibongakonkedludla997]

This video was uploaded 10 yrs ago but still impactful even today. I was struggling to sketch root locus. This video helped me pass Control Systems, my final elective for BSc Electrical Eng. Kudos to you Brian, you've earned a new subscriber.

[@abnormalessandrossauros]

Best thing my Control System teacher ever did: recommend this channel.

[@rizkiputraprastio7553]

I'll always recommend this channel for whoever is studying control systems.

[@pokeastuff]

An​ instructor who explains why what he is saying is important is an incredible tactic that unfortunately very few use. Amazing.

[@marbrydav9698]

Very useful. I'm a Canadian engineering student and this has clarified basic things my prof has ignored!

[@thuctranminh2170]

I'm a student at university. love you sir. will watch all your videos. really helpful, informative easy to understand and time-saving. thank you very much

[@abishaipatel20]

So much knowledge in just one video! I dont even know what to note down, I mean everything you say is just important. THank you

[@liuby33]

Our professor who graduated from MIT failed so hard on teaching this course. HUGE thanks and you are not even charging anything while our university asked for $37000 CAD.

[@jiannanli6099]

the best lecturer ever! only 13 minutes covered 3 lecture(120min) of our lecture

[@gustavhassel6721]

"Each open loop pole has their open loop friend and if they don't have a friend they go out to infinity searching for them" those were probably the most beautiful words i have heard in my engineering education so far!

[@TheEhsanTehran]

your videos are AWESOME, I didn't learn a thing in class, but these videos saved my ass in the final exam. thank you so much

[@mathaeis]

I just wanted to say thank you for the informative videos. They are doing a fantastic job at helping me prepare for my final and are vastly more interesting and explanatory than my book or lectures have been. Keep up the great work!

[@harishli2020]

These are the best videos on net regarding control systems. Please upload more videos.

[@nilanshupatwa4777]

Your way of teaching is phenomenal and extremely easy to understand even though the material is not simplified!! Applied engineering with examples is what we need! Thank you!!

[@NickWayne100]

This is amazing. Greatest teacher I've had the pleasure of listening to. Thank you

[@ShajeeJurangpathy]

Simply amazing, control systems has been by far the only major tough subject in my degree and your lectures nail it greatly! Well done and thank you!

[@wireghost897]

Finally. Finally I understand how Matlab knows where to put k. Thanks a lot.

[@ventjemazzel8822]

God bless you Brian; thanks to your way of teaching, I am finally getting it.

[@marcoperez-maccollum4688]

Really concise and sufficient explanations in all of your videos I've seen so far. Excellent work, you have helped me so much... no need to go to lectures now, awesome content you are sharing with the world. Thank you

[@Xtian982]

Thank you so much for these videos. I haven't heard control theory explained this straight forward and easy to understand before.

[@studddy]

Hi Brian...awesome..creative...crisp...what r u..an Artist? Engineer? Teacher?...I think a combination of all...thoroughly impressed...

[@karjun99]

super

[@hyunsupark9684]

You saved my control journey at ust. Thanks 😎

[@xino951]

mate I don't know if its cry of joy or the fact that my professor is not the best and I might fail but I thank you for the explanation, you are a king!

[@stansem6806]

I have exam about Control Engineering in University, just as you predicted and Your set of videos explained everything so much better than in the real course! I appreciate so much that people like you exist! You have great ability to explain rather complex things in a clear and structured way! Thanks a lot and wish you good luck in everything you do!

[@Joe-ng2mz]

These videos are GREAT! Much better than the class I am paying an outrageous amount of money to take

[@JoeGormanPB]

Well done. All your videos are very informative. I didn't think I'd find such a straightforward video on what I thought was an obscure topic for youtube. Cheers

[@briannaaubin4484]

These videos are so helpful! My introductory controls professor was terrible and he tainted the subject for me forever, but this is helping me so much! Thank you!!!

[@Phughy]

This is a crystal clear explanation. Although I'm not English speaking, I learned so much more by watching your rather than the syllabus I'm using! Thank you so much!

[@crossbones911]

You're doing the Lord's work, Brian.

[@ryanlembitz4684]

Beautiful explanation, you are making the world smarter.

[@forestsparks6143]

Your video just saved me hours of struggling, thank you.

[@VoodooStyx]

Your tutorials are sooo useful, I wish you covered the subjects in all my other papers as well

[@ariasardari8588]

Your explanations are very very clear. Thank you so much

[@Aleeeeyas]

I love youuuuu. Your video helps me a lot. I mean a lot. I take this course in german and can hardly understand it. You make my life easier. Can't really describe how gratefull I am.

[@seimela]

English is my second language .......I like the way you explain it at 8:55 when you say by multiplying with infinity you put more importance on Q(s) THE WAY YOU USE DOMINACE AND IMPORTANCE is very much nice

[@DocFrobnitz]

Same here, control was hell - glimpses of wonder, but only glimpses. After grad school + a few years in industry, I finally figured out what happened: my prof knew how to do the work, but he had developed zero intuition about why things work the way they do. So we had to take it on faith, which isn't very satisfying when you actually want to learn something. Brian has excellent intuition, and the ability to communicate it... in school I learned how, here I'm finally learning why. (Which rocks.)

[@redoxepk]

I have learned so much from watching your videos. I'm taking a controls course right now and I thought it was awful until I came upon your videos. The material is extremely cool but my professor teaches purely the mechanics and it's frustrating to not understand how this stuff applies to the real world. You do a great job at making the material interesting and I can't thank you enough for taking the time to make these.

[@hashemzaitooni3296]

i would like to thank you for your awsome videos!! eventhough english is my second language and i live in Saudi Arabia, i fully get the concept behind your lectures because of the beautiful way you represent them again thanks alot

[@Deprepsilon]

wow watching your videos for 30 minutes took away 3 weeks of confusions

[@travelwithvikky8355]

U are the best teacher for this subject .

[@sarthakvarshney]

I have no idea how would have I understood it without you, when my exam days are on my head.

[@BigBrickGrandpa]

Thank you! You saved so many engineering students like me to pass their courses.

[@oleksandr0693]

These videos are pure gold!

[@josepaul2000]

Excellent video! Great use of colours! And nice handwriting!... But most of all, excellent presentation of ideas... We need more teachers like you in this world!

[@dradexx]

Brian Douglas is the greatest!

[@cosmic_gate476]

Thanks for explaining the purpose behind doing stuff, it's the only difference between being able to vomit answers in a test vs. actually knowing what you're doing and why (which is what's needed out of education)

[@alexmiller6118]

oh my god, you saved my life!

[@khalid69322]

mine too :D

[@matthewcsbrown]

You are a legend, Brian. It is rare to come across people who make such good videos. Are you a lecturer? Because if you aren't, you should be!

[@toufikzisan1064]

Lifesaver. Thanks for such clear and well structured tutorial.

[@KPImon.]

Lester H1 year ago Some of the lecturers from my University does NOT deserve their salaries. Thank you. I'm with Lester :)

[@tuwenbo]

thank you very much Douglas! I'm very expected your new videos!

[@happyhippr]

I cant thank you enough for these videos..

[@rosalbacostilla2098]

No words to say but thanks! My test of Engineering of Control is at Monday and I was about to lose my mind, thank u!

[@NirmalKumar-sc5tk]

Thank you so much sir. Your way of explaining things is exceptional.

[@soniapatel4501]

never understood this in class like I did after watching this video.! thank you!

[@JimCAhn]

This and part 2 are excellent videos helping one grasp the concepts of a root locus sketch. However, I wish the comment at the end of part 2 about this not answering the university required questions such as intercepting the imaginary axis etc. was mentioned as a disclaimer in the beginning of this video. I am grateful that I now understand the principles, but I now have to spend additional time researching videos that explain those other rules, which I will need to know for exams (but never again in real life, thanks to Matlab). Still a big thumbs up!

[@jamie123b]

Thanks for using black background saving our battery life

[@ncgrof]

Thanks Brian. You were right in your assumptions, I have an exam coming for control systems course. Thanks again. That's a good video. Thanks.

[@SoumenSahaJyoti]

You are the saviour, man! Lots of love for you!

[@kenw4874]

You are explaining it better than my tenured professor

[@BrianBDouglas]

Other? My degree is in aerospace engineering so closer to mechanical.

[@PavanKumar-qn8sl]

Brian Douglas hello sir. Can you explain how the zeros in transfer function showed in 5:13 will effect the root locus..

[@abdulqayyum3156]

@@PavanKumar-qn8sl zeros does not effect the root locus but they do effect the forced response of the system

[@abdulqayyum3156]

@@PavanKumar-qn8sl zeros means zeros of close loop transfer function not of open loop....

[@dhruvin19]

I promise you , this is the best video has helped me more than 11 hours of intense lectures have

[@kacyleung8421]

How lucky I found your video before my quiz on control systems. :) :)

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Thank for your video. It's so greater, make I wanna learn about it more !

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Such an amazing mentor. Thanks Buddy. You are my new hero xD

[@kurianmathew3299]

I didn't like control system, but after seeing these videos i started understanding it. I am starting this a day before the exams and I think these videos helped me a lot. Do you have a series about signals?

[@Mr.Nobody244]

short yet very good.....great work...

[@tmosest]

Great videos! Appreciate the content. I like playing around with digital graph parameters more even though that’s a modern luxury.

[@ikerhua6500]

The drawing at the beginning made my day!!! Exam tmr lol

[@louissingleton-knott5557]

iker hua yup panic time :)

[@RoboticsParlour]

Really excellent videos! Thank you for the clear explanations!

[@pedro-eu-mesmo]

These classes are great, thanks!

[@BrianBDouglas]

(1 of 2) This is tricky. We've already thrown out realism with a linear system because no system is truly linear. And as you point out we could take the derivative of a signal and that transfer function would just be 's', which has more zeros than poles. But the problem comes when you input very high frequencies into that system. The amplitude of the output goes towards infinity as the frequency goes towards infinity and no real system behaves like that.

[@ikhlasbenhmida1711]

I love you

[@quinn743]

oh my gosh. I am just now getting the significance of how to get to 1+KG = 0 form... hooraaaay for this explanation!!!

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These videos are awesome! Excellent job and keep it going!

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You made life easier and interesting, again! Thanks!

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Thanks Brian. This is really top notch quality videos. Could you please tell me which tools you used to make these videos? I have a channel and I would like to put up some material about non-integer order controllers up. Your methodologies seems the most exciting to do it. Thanks, Youcef

[@yilun354]

future world control teams are learned from you, you are the keystone of humans future. President of IEEE

[@jrtkpnz]

I've always enjoyed my control systems lectures But now they make sense lol

[@li-pingho1441]

this video save my life

[@julianbell9161]

my professor found a way to make this seem outrageously difficult

[@RafamSales]

You've earned my subscription. Thanks for the initiative.

The roots are the poles of the closed loop and their value depends on the value of K (which is defined between 0 and infinity). When K = 0, the poles of the closed loop are equal to the poles of the open loop and when K approaches infinity, the poles of the closed loop are equal to the zeros of the open loop. You can see this very clearly when you set K as either 0 or infinity in P(s) + k Q(s) = 0.

[@joshburger2217]

engineering jesus

[@spyros07]

This is excellent sir. I guess you could teach many subjects in electrical and control engineering. Keep it up and thanks.

[@speeder286]

This guy is incredible

[@gnp0576]

Thank you very much! This is a very clear and useful video. Keep up the good work.

[@TheSweBoo]

THANK YOU SO MUCH FOR THIS, I FEEL SO ENLIGHTENED

[@samchow6021]

You really save my life!!!Thank you!!!

[@gawayne1374]

You saved my life man

[@sivaprakash2558]

Thanks for your info... when k approches infinity how the closed loop poles approach the open loop zeros.

[@luis2arm]

very nice explanation! great job! thanks a lot

[@anthonychen7748]

Brian you are awesome!!!!

[@cikkinis]

thank you! you have opened my mind!