Control Systems Lectures - Closed Loop Control
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- Опубликовано: 18 окт 2024
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This lecture discusses the differences between open loop and closed loop control. 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!
Don't forget to subscribe! Follow me on Twitter @BrianBDouglas!
List of errata in this video:
There is a missing "e" in the word change near the beginning
There is a missing "l" in the work literally in the sprinkler system example
There should be the reference signal "V" in the transfer function at the end of the lecture (this one I called out in the video).
I hate uni because most professors seem to forget that they were ever students. In two short videos you have made this concept crystal clear. It's sad that it never fails that watching RUclips videos helps understanding better than 3 hours a week in a lecture. One more vote for YT degrees!
School is a control system... You think they're gonna actually teach you shit.. Lol
psford1 My words that first sentence.
This is just soooo true- sad but true- I came looking to find a simple well defined explanation, without Laplace crap- found it here-
totally aggree!
Totally agree. Can we just ditch the idea of going to class already and do it all from home?
The way you organize the material in a step-by-step logical manner is extraordinary ... huge talent for teaching.
Thank you for the comment Ahmed. I can't promise the future videos will have such clear explanations, however, if anything is not clear please leave a comment and I'll respond to it.
3rd Year Mechanical Engineering Student here, this stuff was completely over my head at first seemed so unusual but you do an excellent job of explaining everything, but a little fast. !
Man, I like from no where arrived here, watched your videos and am thinking, WOW!!!!......so simply put and explained.. For a foreigner studying in China, and not understanding anything the lecturers are bubbling about in classes (because all lectures are in Chinese), these videos are really helping me... Peace and God bless you for the free knowledge....Please continue..and you write very good and as fast as you talk too..cool....:)
Unlike websites I've searched for explaining closed loop control, your video gives definition to "Control Loop" and "Control Theory" in a way that is easy to understand. Thank you!
One of the most interesting and understandable lecturers I've ever been lectured by, and i can listen to them over and over! Thank you very much
😇💜🤲💡
the handwriting is so neat
I just want to say, I am a senior Mechanical Engineering student. I am taking Linear Controls class. I have been in that class for 7 weeks, and we apparently covered all the basics that are outlined in your videos. But every time in class, I have zero clue what is going on, I get how to do it systematically, but the purpose and meaning remained unknown. I just watched your videos and I gotta say everything makes clear sense to me, its like I have been enlightened. I just wanna give you my great thanks for taking the time to share your knowledge and teaching it in such a understandable way!
You and PatrickJMT are probably two of the leading people on RUclips that help shape the engineers of today and tomorrow.
God bless you!
I'm posting a video right now on the Laplace Transform. However, it's a graphical approach to the transform to try to give another perspective on what it is doing and how it allows us to solve differential equations. Khan Academy has some great videos on PFE which cover the basics. As far as when to use them with Laplace transforms I'll try to touch on that in a future video.
I am an M.Sc Control Engineering student at University of Rome. The faculty includes many of the greatest scholars of the field, say Alberto Isidori, Giuseppe Oriolo, Alexadnro De Luca, etc, all of whom are very well-known worldwide. Although being a great scientist doesn't necessarily signify of good teaching skills, I think the instructor here in this video is teaching just as good as them. Best of luck to all of you.
so your profs are great scientist but not good at teaching...mr brian teach as good as them which mean he is not good at teaching either ....failed
Mohamed Magdy You are being fallacious. You need to be inculcated a little bit of logic I guess. Check this page for a start en.wikipedia.org/wiki/List_of_fallacies
Then read my propositions again.
i read your wiki page and it proved that you're wrong
Mohamed Magdy You just made one of the fallacies mentioned on that very page!
NO! You just made the fallacy of "Ignorantio Elenchi"! You established my sentence and inferred a false conclusion! I advised that being a great scientist does not mean that they are good teachers. You mistakenly deduced that I am saying: "They are not good teachers!". Actually they are good teachers, yet, being great in the field does not account for that.
Then I added "I think . . .", to show that I am aware of this fact, but I want to give you my speculation on how they teach and how this person teaches.
i have learnt more from you in 5 minutes than i have on my whole systems and control course which i pay 10 grand a year for...... thank you for taking the time to do this.
As a master's student of control systems, I should say that I just learned what a closed loop control system does. Thank you very much. Please Continue
the fact that these notes are so neat and pretty makes it so much more interesting to learn !
I like the way you present your lectures. Simple, clear and to the point.
I literally paused the video to like this video and subscribe to this channel. Excellent video. Thanks a lot. Awesome work
me too , really brother i did the same:)
2:12 "The plant, which is the grass in this case..." Bringing literal (botanical) meaning to the technical term "plant".
thanks. had to brush up my basics for an on job exam. your playlist was a lifesaver.
These lectures are ABSOLUTELY the Best I have ever encountered on Control Systems! You are brilliant! Thank you Brian. I will defnitely purchase your book. Please add lots of real-world examples + MATLAB/SciLAB in your book.
This channel is awesome. I am going to watch every video. I am starting my master’s in Control Systems Engineering in Fall 2018, I am going to get a head start on a lot of the material with these videos. :D
how's the masters degree coming
@@TheHaloFan171 ended up getting a masters in software engineering while working full-time. I am hoping to start a PhD in statistics.
@@StonkeyKong oh man, what a turn of events, what was your undergrad in?
@@TheHaloFan171 electrical engineering, minor in physics.
@@StonkeyKong why'd you switch up from the original plan? was thinking about getting a master's in controls too
You have probably heard this too many times but if you see this, damn you are a hero! Thanks for making proper mathematics videos that are available to everyone!
Learned more about control systems in this video than all the lectures and text books put together. Nice job.
Creating two different playlists was an excellent idea. Thank you Brian, fantastic job!
Thanks for your wonderful video on control theory!
For your question at the end of this video, I think it is because the sensor is not directly reading the value of y (the output value of the plant). Rather, you need to introduce another system to describe the external environment (e.g. property of the plates in the case of the dishwasher or the slopes and terrains in the case of the self-driving car), and the sensor's input is the result of the interaction between the plant's output and the environment.
There are two ways to watch this video:
1) you pay attention to what he's writing, and listen to his words in the back of your mind.
2) you pay attention to what he's saying, and look at his sketches but don't really concentrate on them, your attention being occupied by his words.
The second method of watching the video works. Not the first one. It's easier to keep listening to him, without looking at what he's writing. You can look at the screen and try to take on things from time to time, but you have to pay attention to his voice.
Hope this helps someone!
I watched this while doing the dishes and laundry and understood 70 % of it which is close to what a normal person would comprehend in an average classroom environment .
+Syed Saif I was in deep sleep while this video was playing. I only understood 80% of the lecture, something much higher that an avg attentive listener would ;)
Dheeraj Reddy 2 years old, but not necessarily, some people are more auditory learners and some are more visual learners
watched another video and still understood 90% of this vid...what the joke's dead? alright then.........
i dont know if you still use this channel but I wanted to thank you from Poland Politechnika Gdańska, very good tutorial!
There should be no other way to explain this in more easier way than you have done it here. One of the best and accurately explained video. Thank you. It helped me to understand the concept once again and thoroughly.
I am currently working in a plant which uses PID controllers and I have no experience with them as my past 30 years did not involve them. I am scrambling trying to catch up on this technology and this is an excellent source of information. I have gained a much truer grasp of PIDs here than from anything I have read up to now. Thanks for the help!
Great first video and intro Brian. I'm no newcomer to control systems. Was often thinking about how to begin some introductory videos on the topic. Much admiration from me on your efforts. Well done, great job! 😊😊
Great, Brian, just wow. It would seem like a million time repeated comment right here, but I wish I could have had my professor started the course in such a clear way like you did here! Thanks, man
in answer to your last question at the end of the video:
I would say just by designing controller D, you can not make your plant G behave the way you want. because the plant might have some physical limitations.
if you say I want to maintain a speed of 280 km, no matter what the controller's command is, "a not very strong car" might not be able to reach this speed.
+azin ghaheri sharghi Agreed. I also suspect the following:
1. We are assuming that we have captured a perfect model of the plant when there could be errors. For the car example we might have assumed a certain input-output characteristics for the gas pedal position vs the force generated by the engine, which might not be accurate.
2. What about external uncertainties? Such as in the car example the friction of the road varying at different places, wind etc. These are things that our entire model might not have captured.
Awesome lecture series. I'm taking a control class at Berkeley right now and these lectures are much better than my prof. Most people don't realize that you can teach at a faster pace than normal in youtube video because the listener can always pause. It keeps people from getting bored.
8:34 I think the limiting factor is the assumption of linearity (embodied in the final algebraic expression for the plant) underlying the model. There is nothing that in practice behaves in such an idealised manner so our attempt at control is limited to a range. Nice and easy to follow. Thank you.
I can't believe how late I found this, your channel is gold! diamond! I'm gonna be learning Control science and engineering for the next four years, and your video is truly inspiring and helpful. Knowledge is always sexy anyway
Wow thanks Brian, your video helped me a lot to understand this concept.
So here is when all started... A legend was born.
Awesome, i am so glad i found all of this as it will help my Controll Systems Engineering Course. You Brian Douglas is truly awesome!
If it is 1/10th as clear, it will still be roughly 100% better than my instructors rendition of how control theory works, no exaggeration, well maybe a little, maybe 98%. The sad part is that I attend a school that is ranked #5 in the US for top electrical engineering schools. Thank you very much. Subscribed!
Although you talk a bit fast, but great job and I am happy to find you at the start point of my term for Modern Control System, I hope you have covered all the topics we need. Thanks for explaining in a very professional and simple manner.
+Mohammad Dawodi You can pause the video.
Brian THANK YOU SOOO MUCH for sharing your knowledge in this area. I have been looking for an understanding of control loops for quite a while know, and the way you explain things actually makes sense!!
i was confused by closed versus open loop systems in my Motor Learning class, and even though these examples have nothing to do with human movement, you've made it so clear that i can apply it to anything. some professors are a joke.
it is such a blessing to find this channel specially a week before ur exam,great job !
Well a friend showed me this and I'm a little confused, but fascinated at the same time thumbs up.
wow I never became so interested on our subject (Control System) until I watched your video I finally can understand engineering in real life
Sir your lectures are really really great, the way you tell a brief history about why different techniques where developed creates a sense of interest in this subject...and the way you break complicated concepts into simpler one is icing on the cake!!!
Please do! I'm studying control systems this semester in school and your videos have helped clarify the basic concepts. Your channel has definitely got the best control systems lectures I could find and I'm sure many others will agree as well so please do continue! Hoping to see some more frequent video updates too! Thanks!
thank you so much dude, for me it's easy to understand rather than my lecturer's explanation
Don't know why, but the 'plant, literally' joke cracked me up. I was thinking about the exact same thing. Anyway, good videos, your videos are super easy to follow.
OMG this is awesome please continue the video is amazing you drawing and simple explanation is spectacular you simply said what we gave in two lectures in ten minutes
continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue continue :)
even though english is my second language i can understand this video more than 2 hours lecture at uni. Great job!!!
I love this! You are amazing. The logic is clear, the art is excellent. It is wonderful. I wish my videos were this good. You are my new role model.
The control system class that I took a year ago finally makes sense after watching your videos. You do a much better job of explaining the concepts. Great job! Keep rolling out these awesome videos!
Trunks, thanks for the comment! I've just started the series and I plan on taking it through classical control, modern control, dynamics, sensors and actuation. Or at least as long as there is an interest on RUclips to have me continue.
Thank you for the errata list, I was looking for the missing "V" in the last "Y" equation. You're classes are very interesting, congratulations :-)
Went into the comments just for this "V" I'm not going mad it seems :)
Second week into control systems and learned more in 10 mins then I have for the past two weeks. Thanks great video, I might not be dropping controls this semester
About 2 years ago, I saw this same video because I had to do a paper about PID controllers. Back them, this made no sense to me. Now since I've learned about convolution theory and LTI systems, it's really easy to understand.
Thank you so much for the video. Helps understand the mechanical engineering class I am taking, linear systems and control.
Man, you know how to teach. Brazil thanks you.
All the videos very helpful for my control system exams... Thank you very much...!!!
Hello Brian. Thanks for these videos. I am preparing for a college course on control systems. I like how you came up with the concept for the transfer function in order to look at a system as open loop.
💓💓💓💓💓💓
omg, i now understand what i'm learning at the uni. the professors are absolutely tragic, no one has any idea what they are talking about... THANK YOU
Outstanding ability to introduce the material!
Why do Professors get paid so much. This man taught me more in 9 minutes than my professor did in 4 hours of lectures.
Great video Brian! Helped me a lot! Thanks.
Thanks Brian this is much appreciated. My Control Systems class left me with a lot of questions I'm hoping your lecture will start to answer.
hi brian, i'm a fan of ur work here. but i'm an engineering student and our teacher tought us abt type of control sytems as natural and artificial, i would happy if do some tutorial abt other kid of classification of control systems
Thank God and to you, I found your channel and it's very useful in my study.
thanks man you clearly explained that . the best tutorial video ever !
Best control system lecture
Thank you for your videos.They are very helpful and full of information given in a short time.You have excellent teaching skills.
Excellent stuff, well done! Although it is a fast delivery it is so logical you just follow the steps. However I download and watch your videos over and over until I can predict what you are about to say, that way proving my learning. I'll look out for the ones on dynamics, sensors and actuation. Thanks - I love the ones on PID - recommended
Brian Dougles! Wish you were my lecturer for control theory at my university. Great video!
Great job. I was trying to improve my understanding of open and closed loop engine management in my car and now it makes perfect sense!!!
😉
Awesome material! I think your video are so much better than the lecture I attended. Subscribed!
Amazing , Amazing , you don,t know how much problems you solved for me . bless you.thanks
Perfectly well an clear until 6:55. I don't see how it's possible to understand this without prior knowledge of the subject. We haven't even established these Variables as functions yet and you already start multiplying them. At least my understanding is that they should be concatted and not multiplied just from what i can gather from the video. Not saying what you do is wrong, but i can't really understand it without already having known something this video didn't explain
Yes, at this point you have get a book and read it. :/.
at that point, it just took off into space
this knowledge is obtained from the signal and analysis course and the topic is LTI system.
Agreed
You are the best, everything in your videos are beautiful, thank you.
Starting here to learn a semesters worth of controls before Thursday. OHHH YEAHHH
7 years later here I am. FUCK YEAAAAAAAA. thanks brian saving lives
Hi Arsenal, I can't really number my videos because I don't post them in the order that a brand new person should watch them in. I sort of jump all around and it would take me a long time to constantly re-number them. However, I do make playlists of the various topics I cover and place the videos there in the order that people should watch them in. And I do keep those playlists up to date. Hope that helps. Cheers!
Hello Brian. Please can you recommend a textbook on Control Systems?
Guys watch all series. Best control systems lectures on Internet.
I love every single thing about it
you are amazing, sir please do continue what you are doing.
Great class! You are the best teacher that I have seen!
I love you man i took the whole course i got good grade in it by cramming but i dont learn anything other then bunch of equation how to apply laplace transforms and if you have given certain thing what to method to apply to solve the exercise problem.
Thanks for your video it really helped
Very well done sir! Hope you will continue in future..wish you all lights green
Thank you Brian
Nice presentation, very helpfull
I permit to download this video
thank you so much!!your video really make me understand even more about control system.
thats video so amazing,i've got very useful basic concept which i don't get in my university
Your videos are great! U are genius, man! Complex theories become fun after your explanation. I am gonna download all the videos. I do not understand why professors explain these theories much complex than the theories themselves.
thank you for sharing your talent of teaching with the world. Your contribution is enormous.
Could you please make a video on State Space representation. Really appreciate your work.I'm glad I found your channel today
Thanks a lot. I've been reading my lecture notes and didn't really get much info. But this video is awesome. Thank you guru.
My Controls course went from a C to an A because of your videos
Amazing video, same info as my 50 minute lecture in a much more engaging and easy to understand manner. Keep it up!
😉
Thanks heaps for all the videos and your time!!! May all good things come your way...
Thanks for your video helped me a lot in understanding the concepts
Interesting Tidbit: There are dishwashers with water turbidity sensors. Turbidity means how much “crap” there is in the water, or how “unclean” it is. So the dishwasher will run some minimum number or length of cycles, and will add some to achieve desiredly low turbidity before moving on, or it can use the turbidity in open loop mode without changing the water: the more turbidity, the longer the main cycle that involves soap, since there’s no more soap once you dump that water. The dishwasher I have seems to run pre-rinsing in closed loop, where it’ll add up to 3 rinse cycles as needed to get the water sufficiently clean before the main wash. It’ll then time the main wash (with soap) based on how dirty the water is after a few minutes of washing.
thanks for making control easier to understand!
Dear Sir, Thanks a lot for these nice videos. We learned the control system better.
This is really amazing work....!
Now I dont need to wait for this course to be taught in my class which is next year!!
I wish my profs would teach stuff this way.....giving emphasis on the physical significance...KEEP UP THE GOOD WORK :D Hope to see more of your videos coming up!! Thanks a lot :)