Control System Lectures - Bode Plots, Introduction

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This lecture is an introduction to frequency response methods, and in particular describes the Bode plot. I go through how it is generated and why we use it to visualize the frequency response of a system across the entire frequency spectrum.
Errata:
8:31 - I should not have combined both time domain and s-domain in a single equation.
9:31 - it should be 2 - j*1/omega, I correct it at 9:55 but don't let it confuse you!
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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Пікірлер: 500

  • @therealgoat3367
    @therealgoat33674 ай бұрын

    POV you're in the most challenging stage of your academic career. Good luck

  • @alexpatterson5954
    @alexpatterson59544 жыл бұрын

    This is amazing! My signals professor doesn't teach very well and now that we've switched to remote learning, he doesn't give us any lectures and only gives us written handouts that are sometimes hard to understand. I love how succinct yet in depth your videos are! You have no clue how much this helps

  • @pranjalsachan1179
    @pranjalsachan1179 Жыл бұрын

    This is the best playlist out there for understanding bode plots. Believe me, I am an Electrical Engineer and have studied bode plots a number of times but never had such an understanding.

  • @azscott8737
    @azscott87378 жыл бұрын

    The things I learned in these video are way more valuable than the ones I learned over two semesters of control courses. This guy tells you every thing why they are there and where they came from and so on. I wish if I had him as a control professor

  • @RC_Engineering
    @RC_Engineering10 жыл бұрын

    You may be the best in the world at explaining these concepts. At least for my style of learning.

  • @grace9465

    @grace9465

    10 жыл бұрын

    agree

  • @RC_Engineering

    @RC_Engineering

    9 жыл бұрын

    Brian Douglas My whole control systems class at UCSD thanks you

  • @TheSlyProfessor

    @TheSlyProfessor

    6 жыл бұрын

    I am funnily also at UCSD, albeit studying computer music. I finally understand why LTI's matter. They don't seem so arbitrary anymore. Now to finish watching all your other videos (which brought me here)...

  • @paulnnamdi4098

    @paulnnamdi4098

    5 жыл бұрын

    Exactly the same with me. The way he exlains it is best I have come across ever. Wonder why a lot of other teachers do it the way they do.

  • @joannqiongnachen9849

    @joannqiongnachen9849

    4 жыл бұрын

    Agree! I won't be able to survive my control system exam without him

  • @patriceamyot4235
    @patriceamyot423510 жыл бұрын

    your explanation of the history of decibels is amazing and thorough! Very impressed!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Absolutely! I'm finishing with Bode this week and then want to provide a good practical understanding of stability. I'll touch on root locus at the end of the stability portion and as we get into tuning controllers.

  • @Poiarn
    @Poiarn10 жыл бұрын

    I've never seen or read anything that comes even remotely close to how good this video explains bode plots! Really good job!!

  • @anantikamehra1694
    @anantikamehra16949 жыл бұрын

    I love how everything somehow starts to make sense after you explain it. Thanks so much for taking the time out to make these videos!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Hello Samay, You are absolutely correct. I should have written the equation in the S-domain completely, or Y(s)=2U(s)+U(s)/s. However, I accidentally left the input and output in the time domain. Thanks for pointing this out. I hope this doesn't confuse anyone watching the video.

  • @DrgonMark

    @DrgonMark

    9 ай бұрын

    İ was confused last year but got 100 mark! Thanks bro. 😂

  • @Johnyindo387

    @Johnyindo387

    5 ай бұрын

    Jakun ge ital😊

  • @johnsalvadoresabio2491
    @johnsalvadoresabio24915 жыл бұрын

    The quality of your videos speak to how much time and effort you put into your channel. Thank you so much.

  • @vargil777
    @vargil7775 жыл бұрын

    Dear Brian, your efforts are much appreciated. You made the understanding of control systems very easy, you are the best in making us to visualize the concepts in a deeper sense, your way of presenting is so good that any non-technical person also can understand it. I request you to make a video on how to analyze and understand control concepts using Nichols charts. Thank you.

  • @raghuramsatish5995
    @raghuramsatish59957 жыл бұрын

    you sir deserve a medal Mr.Brian Douglas

  • @sallymin0501
    @sallymin050110 жыл бұрын

    I am Korean and studying aerospace mechanical engineering now. I was struggling with these concepts cuz these things were all new and I didnt know what to do ;(. But, god blessed me and I found these videos so that I can rearrange my concepts through all parts of controlling system. Thank you very much for all these super lectures ♥

  • @eugenenazarenko9220
    @eugenenazarenko9220 Жыл бұрын

    This was an amazing video. I was shocked to see it is over 10 years old at this point, unreal quality!

  • @jacobhardy2313
    @jacobhardy23132 жыл бұрын

    Taught me what my vibrations/control professor couldn’t in a whole semester. Thank you

  • @dylanschink240
    @dylanschink2409 жыл бұрын

    These lectures are so helpful, I wouldn't be passing with control theory module without them.

  • @rileystewart9165
    @rileystewart91656 жыл бұрын

    Love the lectures! You're changing the world. Legit. Bringing quality education to the masses. Thank you!

  • @jeanapp_
    @jeanapp_7 жыл бұрын

    Love the fact that you use so many colors in your video. Makes the complete subject much easier to concentrate for me. I'm a person who thinks graphically so the pictures have to be good, colorful, but with only the essential information in order for me to stay interested (which is not an easy task, as I have noticed ;)), but your video makes me feel that I can understand control systems. Thank you so much! (Love the Mr. Bell that you drew btw)

  • @ricky-lee7553
    @ricky-lee75538 жыл бұрын

    I paused the video around 9:40 then spent 10 minutes trying to figure out how to get 2+(1/w)j when i kept getting 2-(1/w)j. in the end i gave up and decided to watch the rest of the video anyway only to find you corrected it as a mistake 10 seconds later at 9:50 -_-... That said, your style of videos are absolutely brilliant!!!... so ill let you off this one time =] Cheers!!!

  • @Natester13

    @Natester13

    7 жыл бұрын

    Saw the samething, glad I saw this comment before I complained lol

  • @nirbhaythacker6662

    @nirbhaythacker6662

    7 жыл бұрын

    I was doing the same thing, thank god for you that i didn't waste half an hour rummaging through textbooks and google thinking "there must be some other reason as to why he did that, something more complicated".

  • @thehomiebearfifa3528

    @thehomiebearfifa3528

    7 жыл бұрын

    lol thats what being a student engineer is in a nutshell

  • @Barneyismyname

    @Barneyismyname

    6 жыл бұрын

    Haha i saw it too so I went to the comments instead to see if someone pointed it out, your comment saved me from spending 10 minutes as well :)

  • @victorwainaina2584

    @victorwainaina2584

    6 жыл бұрын

    .......I'm a 3rd year engineering student and it took me 10min to figure out why you were all getting that solution....Don't worry though because I'm trying my hardest to get away from this course. Better 3years late than never, haha

  • @jordannoel5826
    @jordannoel58262 жыл бұрын

    Thank you so much for these videos. I'm recommending them to all my friends. A million times better than the textbook we have!

  • @fernando2011
    @fernando2011 Жыл бұрын

    EE student on senior year. Super appreciate this intuitive outlook on bode plots.

  • @muratmillidere
    @muratmillidere9 жыл бұрын

    Brian,you are just perfect. Everyone who is interested in control system should watch these videos.

  • @ONinjaPlz
    @ONinjaPlz10 жыл бұрын

    I wish I discovered you back when I took digital signal processing. I learned how to "go through the motions" in that class well enough to pass but without actually understanding anything I was doing. Thank you so much!!!

  • @ALAAAJAJvideo
    @ALAAAJAJvideo3 жыл бұрын

    Since 2012 (10 Years) this is the best Video about Bode Plots

  • @TY-un4no
    @TY-un4no Жыл бұрын

    I replayed the section explaining the history of decibel unit many times because I was easily distracted by your skilled drawings haha. Thank you for creating clear and fun educational videos!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Yes, obsession is good word! We are obsessed with sinusoids because Fourier analysis tells us that any arbitrary signal can be represented by a series of sinusoids. In that way we can predict how a system will be affected by any input by knowing how each individual sinusoid is affected.

  • @ahxishwe5664
    @ahxishwe5664 Жыл бұрын

    Just realized i had subscribed 10 years back. And i still need to watch your video today. ❤

  • @pranayparekh4306
    @pranayparekh43065 жыл бұрын

    thanks, you are a true legend! the difference between you and my professor's is they teach cause theyre paid and don't care about us, while you are teaching and saving us! you've saved me with control systems!!

  • @naut_nigel
    @naut_nigel5 жыл бұрын

    I can't believe it took me 2 years after graduating when I'm at a professional job to find these hidden gems of videos! Thank you!!

  • @Geddiz
    @Geddiz5 жыл бұрын

    Mate your videos have just about saved my EEE degree, thank you so much for uploading these.

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    I'll try to explain it beyond just "The math says so!" :) Look at the equation around 8:30, the input u(t) is affected through two different paths to produce the output. As frequency increases to infinity the 1/s (or integral path) get's closer and closer to zero. You can imagine looking at a really high frequency sine wave and integrating the signal over time. Once the frequency become infinite essentially the area above and the area below the center line both go to zero.

  • @shanugarg8428

    @shanugarg8428

    4 жыл бұрын

    Oh Mr Douglas, you're just awesome. I just couldn't connects these different topics from Fourier and Laplace to s-plane and what's bode plot... I just love the way you teach all these so simply. I would really appreciate if you suggest me something to feel these things deeply to think and analyse. As a would be engineer, I don't want this awesome subject to go apart of me after I know how awesome it is. No doubt your lectures are end to end to grasp the concept but ultimately practice and self exploration is the key. And you understand the things I should go through as only engineer can understand and find an engineer inside a student. Professors just teach for exams and I'm not in face of marks. I'll end my words with the request to reply to this and help me with suggesting resources.

  • @AdityaMishra-pp1gw

    @AdityaMishra-pp1gw

    4 жыл бұрын

    @@shanugarg8428 You can easily use Matlab and Simulink to visualize all this concepts.

  • @TheGiota100
    @TheGiota1008 жыл бұрын

    Very helpful! Thanks! Studying two days before exams these things ain't easy and your video really did help!

  • @afdelgado1
    @afdelgado17 жыл бұрын

    damn... I hate learning material without the history behind it. It's so important in my opinion this literally took like 100 page description in the book and broke it down in less than 13 minutes. thanks

  • @radoyapanic1669
    @radoyapanic16694 жыл бұрын

    One of the best youtube lectures I've seen. Thank You.

  • @angelivangamboa769
    @angelivangamboa7696 жыл бұрын

    Love your videos. you "learned" me this material in a night when my professor took 10 weeks confusing me...Thanks for the videos! keep up the good work

  • @masoudkhamushi9821
    @masoudkhamushi98218 жыл бұрын

    well, i dont know how to thank you brian but i can say you are the best, indeed you are thank you

  • @manueljenkin95
    @manueljenkin952 жыл бұрын

    Such an amazing lecture series, so few comments. Extremely underrated (most of educational resources at KZread feel this way).

  • @neelamrajkumar3254
    @neelamrajkumar3254 Жыл бұрын

    This led me to enlightenment in control engineering.Great lecture and let's make this lectures to be known for content seekers by sharing 👏

  • @HassanOmariprofile
    @HassanOmariprofile7 жыл бұрын

    I have to say this, you are the greatest control teacher I have ever seen

  • @mohammedkhalid9317
    @mohammedkhalid93176 жыл бұрын

    I've been suffering trying to understand these concepts but now you have just solved my problem ,thanks a lot

  • @percyjacks8170
    @percyjacks81708 жыл бұрын

    Awesome video as usual and that sketch was awesome!

  • @GopalGupta15
    @GopalGupta1510 жыл бұрын

    Excellent tutorial for beginner to understand the basics!!

  • @Ryan-jl5yn
    @Ryan-jl5yn2 ай бұрын

    bro you absolutely smashed this course! I'm probably not going to my signals class ever again

  • @Zvanteman
    @Zvanteman8 жыл бұрын

    Missed my courses lecture on bode diagrams, this is a life saver! Thanks!

  • @aliusef2912
    @aliusef29122 ай бұрын

    "Your explanation of control systems is amazing. You absolutely nailed it, my friend."

  • @alexissanchez9730
    @alexissanchez97309 жыл бұрын

    this is what im waiting to watch on youtube , very good job Professor

  • @jovanasavic4357
    @jovanasavic43579 жыл бұрын

    You've saved my lazy ass once again. Thank you for this amazing lectures!

  • @renandebritoleme3097
    @renandebritoleme30974 жыл бұрын

    Great class! You are the best teacher that I have seen!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Hi Bill, I will be uploading 4 new videos by the end of the weekend but they will all be on very specific concepts in drawing Bode plots by hand. I wish I had the time to make more of these but I'm normally limited to just one a week. Best of luck on the PE!

  • @anukritsaxena6328
    @anukritsaxena632810 жыл бұрын

    thanks brian, m learning bode this time... and thanks to you!! hats off - you are doing a good job educating people around the globe :)

  • @rickydags
    @rickydags8 жыл бұрын

    This just saved my butt for my control systems homework! You are so much better than my actual professor! Thank you!

  • @deuss001
    @deuss0013 жыл бұрын

    Excellent explanation, brought me back to school of what I remembered about this work...

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Hi Stephanie, the diagram at the beginning of the video had an integral in the lower path. When you take the Laplace Transform of an integral you get 1/s. 1/s is the S-domain representation of integration.

  • @kunal-chandra
    @kunal-chandra3 жыл бұрын

    Excellent video with all basic concepts revised for explanation.

  • @stephenshaw1858
    @stephenshaw18587 ай бұрын

    Great descriptions mate, appreciate your videos making simple explanations on quite a difficult topic.

  • @adityachaurasia2532
    @adityachaurasia25323 жыл бұрын

    8 years later still helping me. Thanks

  • @Abayas.
    @Abayas.4 жыл бұрын

    I know my professor means well, but boy oh boy do your explanations blow his out of the water! Thank you for putting this up.

  • @zz9758
    @zz97586 жыл бұрын

    Thank you for your hard work to make us understand this!

  • @RanjithSethu_findmehere
    @RanjithSethu_findmehere7 жыл бұрын

    sir, in the beginning of video you said about sine wave and linearity , it was thought provoking i say. Now i got a new way of differentiating linear element and non linear element in circuit components , thanku

  • @ejminava407
    @ejminava4074 жыл бұрын

    Thank you for taking the time, this is very clear

  • @pawanbhatla2711
    @pawanbhatla27112 жыл бұрын

    Amazing content. I always used to wonder why are we multiplying 20 time log for decibels. Thank you so much.

  • @aaronbissoondial7659
    @aaronbissoondial76592 жыл бұрын

    This saved me so much time. Amazing explanation!!!

  • @rohanpandya7739
    @rohanpandya77397 жыл бұрын

    Thank you Brian, you make controls fun!

  • @matheuscamargo9187
    @matheuscamargo91873 жыл бұрын

    Excellent explanation. I don't even know English so good, but i've understood almost 100% of the content. Thanks!

  • @nivpeer2052
    @nivpeer20529 жыл бұрын

    Thank you for the simple yet very informative lecture

  • @perekelund7312
    @perekelund73128 жыл бұрын

    Astonishing lecture! Thank you ever so much!

  • @akaludestateklu2444
    @akaludestateklu24444 жыл бұрын

    I really appreciate the way you explain....thanks very much

  • @nadie-qm8rq
    @nadie-qm8rq4 жыл бұрын

    this video was soooooooooooooooooooo useful, I understood so many concepts, the introduction really helped

  • @atirahismail598
    @atirahismail59810 жыл бұрын

    This really saves me for my mid-session tomorrow!

  • @imanbagheri1140
    @imanbagheri11406 жыл бұрын

    I wanted to appreciate you for this tutorial, thanks brother, it was definitely helpful

  • @jing-chingchen2333
    @jing-chingchen23334 жыл бұрын

    thanks for clarity of explanation!!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Yes you are right ... but I corrected it at 9:55. Good catch!

  • @monicag1115
    @monicag11152 жыл бұрын

    Outstanding!! Thank you so much for making these videos!

  • @mkhaled23
    @mkhaled2311 ай бұрын

    You are a magnificent teacher.

  • @thijsts6184
    @thijsts61844 жыл бұрын

    Amazing explanation.

  • @taremekedzwamudzokora5373
    @taremekedzwamudzokora53737 жыл бұрын

    thanks Brian you made control so much easier !!

  • @aman_
    @aman_5 жыл бұрын

    You are really awesome... You just connected my neurons together to understand bode plot.... You are great...

  • @tomylim6022
    @tomylim602210 жыл бұрын

    holy cow!!! the drawing is good too...this guy is multi-talent :D

  • @jeetshah1485
    @jeetshah14853 жыл бұрын

    Very nicely explained. Thanks

  • @connorgillispie7128
    @connorgillispie71289 ай бұрын

    You're an excellent teacher

  • @RUBENKI-cv8cq
    @RUBENKI-cv8cq Жыл бұрын

    From Ecatepec, edo. Mex. Thank you for your explanation. The concept will be better understood.

  • @owlstandingym6570
    @owlstandingym6570 Жыл бұрын

    I love this lecture!!

  • @kadiryilmaz7378
    @kadiryilmaz73787 жыл бұрын

    Thanx man. Really helpfull. My prof. went really fast over these and I think that was pitty because these are really interresting stuff. So thanx a lot. And a happy new year to all of you.

  • @rudrajeet814
    @rudrajeet8142 ай бұрын

    Wow such great intuitive understanding ❤

  • @JB-123
    @JB-123 Жыл бұрын

    That was an amazing lecture. I would pay money for a full course in feedback by you, not even kidding.

  • @agggg3524
    @agggg35246 жыл бұрын

    You presented me powerful insights. Thank you

  • @devinmckee5463
    @devinmckee54635 жыл бұрын

    Thank You very much Brian Douglas, this is a GREAT video. Very well spoken, elaborate, and visually helpful with your color changes. I only wish you would have answered the question which so many people asked, which was why the laplace transform of 2 for the multiplier wasn't 2/s. One person attempted to answer this, but I didn't understand it completely after around 30 -40 minutes of painstaking rummaging thu the internet and literature. But thank you so very much, this video greatly helped.

  • @jlleluc4s
    @jlleluc4s3 жыл бұрын

    Very nice explanation!

  • @jacclawrence2951
    @jacclawrence29513 жыл бұрын

    this saved my life, thank you so much

  • @5430mr
    @5430mr4 жыл бұрын

    You are amazing! I learned these ideas at uni, got good grate back then BUT god I had no idea about the concept behind them. Now I understand!

  • @BrianBDouglas
    @BrianBDouglas11 жыл бұрын

    Hi Joules, atan2 is a second form of atan (hence the 2). If you wikipedia atan2 it'll give you a good explanation but I'll try to explain quickly. If you use arctan(num/den) then you'll get the same answer whether num = 1, and den = -1, or if the num=-1 and den=1. These two points are diametrically opposite of each other though and so if you care about which quadrant you're in you need to keep track of the sign of each the num and the den. atan2 keeps track of the sign for you.

  • @mnada72
    @mnada723 жыл бұрын

    Simply awesome, thanks

  • @shobhitvoleti1439
    @shobhitvoleti14394 жыл бұрын

    Love the lectures. Thanks a ton!

  • @eamonhannon1103
    @eamonhannon11032 жыл бұрын

    Brilliant video ! So well explained !

  • @zedlepplin9450
    @zedlepplin94507 жыл бұрын

    Man, that was very well explained; another subscriber here. Thanks man!

  • @omarmohamed3473
    @omarmohamed3473 Жыл бұрын

    great lecture!

  • @LightAndSportyGuy
    @LightAndSportyGuy9 жыл бұрын

    These really are nicely done videos.

  • @wayne65
    @wayne6510 жыл бұрын

    Excellent. Thank you.

  • @olivermechling7975
    @olivermechling7975 Жыл бұрын

    such a great video thanks for making this series Brian :)