I think that the number of videos you post on control systems is exponentially proportional to the number of engineering student that pass their control systems exam. Well done sir.
I guess im asking the wrong place but does someone know of a method to get back into an instagram account?? I somehow forgot my password. I would love any tricks you can give me!
@Titus Hank thanks for your reply. I found the site through google and Im trying it out now. Seems to take a while so I will get back to you later with my results.
For the spring example, the non-linear region is plastic deformation, the linear region is elastic. Thanks for the great videos, I'm really enjoying them and learning a lot.
10 лет назад+54
Man, your ability to explain a subject is amazing! Thanks a lot for the videos!
Thank you for the nice comment. I hope these videos help you with your chemical engineering classes. The great thing about control theory is that it can be applied across multiple engineering and social science disciplines.
man your academic skill and ability to transfer knowledge with difficult concepts in videos that last less than 10 minutes is amazing. I will not congratulate you on your technical skills on control because there re to many that have them but I will congratulate you that you are able to transfer knowledge with complex concepts in a very small period time... And that is very rare.. So good work and iIhope the best.
I am from somalia. I found these lectures very usefull, its almost infinite that how much they helped me. not only this video, i had subcribed to your channel and every day am just fishing for control engineering. I like the system stability stuff. By the way thanks for sharing this info.
Hey Brian Douglas,thanks a ton man,thank you so much. These video lectures are simple and the concepts are explained in such an easy manner. I guess the Albert Einstein quote holds so true-"If you cant explain something in the simplest manner,then you haven't understood it thoroughly". My college teachers suck at teaching this and I didn't understand anything in class,but understood everything from your videos.Thanks again.
I believe the last example of the spring, it is plastic deformation that pass the linear region, since the spring will not return to its original form when force is no longer applied but great lecture!! it is very helpful in tying the concepts to real life situations.
Also, sometimes a system is just too non-linear and you have to design a non-linear controller. Sometimes this consists of complicated non-linear controllers, and sometimes it's as simple as two linear controllers that you switch back and forth between. In that second case the switch is the non-linear part of the control system. Theoretically you could have 10 or 100 linear controllers that you switch between based on the operating region of your system, but this is hard to analyze.
Huntergotu, that's a good question. Linear systems are good because we know how to solve them. So when you're designing a real world system you try to make them as linear as possible. If you look at the data sheet of sensors (like an accelerometer) you'll notice one of the parameters is 'linearity'. The more linear, then the more accurate your LTI analysis will be. We also add stability margin to designs to protect against what we don't know, including the non-linear terms.
Your lectures are very good!! Thank you very much for sharing this knowledge in a simple way with us... I am from Brazil and in my university they care more about the solution methods and how solve the problems. We dont have so much time to see the graphics and the explanations that you do in these videos!!!
I’m a first year undergrad considering what to do after bachelor’s and your videos have been helping a lot in understanding what those master’s modules are about :) thanks a bunch!
7:35 the red plot should point downward in the "physically impacted" region, as the force needed to reduced the distance is higher when the coils bench up.
Thank you for your all precious lectures, I couldn't find control theory lecture online, but your video is amazingly helpful to review the contents I learned back in college..
Brian, maybe numbering the lectures will help people to view them in the right order and thus build up their knowledge gradually. The overview might be a bit overwhelming. Great stuff btw.
Hello Prashant, determining if sin(2t) is an LTI system is pretty straight forward. You can do it by testing it against the definition of an LTI system, mainly the linear part. If sin(2t) is linear then it must have the properties of homogeneity and additivity. For example, we'll write f(t) = sin(2t). Now does f(t+a) = f(t) + f(a)? Or in other words does sin(2t+2a) = sin(2t) + sin(2a)? You'll see that this does not hold and so sin(2t) is not an LTI system.
Yes. Plus note that the slope around the origin is normally negative as the displacement and the force typically have opposite directions. Also when the coils physically impact, the force ramps up a lot while it becomes way harder to compress the spring, this is the opposite of what he drew. But as much as he is confused about springs, he does a great job explaining the concepts of control theory :)
Its in the elastic region until you bend the spring too much and it goes into the plastic region, thats when the spring doesn't go back to the original shape
Thanking you for your great lecture on LTI systems, this lecture helps me to understand why after all we choose LTI systems. Can you please kindly post another lecture where you can introduce other systems, sorts of problem related to them, how to deal with them if such system comes across, how would it affect us and what should be our approach. Just an insight and no mathematics.
Well Done Brian. I would like to see more matlab and MIMO systems ; the tools for solving these equations are so many. Concepts are difficult. Working with pressure and temperature inputs ; sometimes vibration. 3 inputs one output. some times two outputs.
Hi Mr. Brian, your videos made me like this subject, unfortunately our University Teacher is not as proficient in teaching as you, thanks to internet we have an option! I have a minor commentary regarding the final part of the video, in your spring graph you noted a Elastic Deformation instead of Plastic Deformation. Have an excellent week. Best Regards, Luiz Felipe
you talked about teaching how to linearize a system in "future videos". But after almost 5 years, I still can't find any video on how to linearize a system?
Hi Brian, I love how you explain this stuff. Keep up the good work. I have a question though. Is there a way to linearly follow your material? instead of watching your videos in random order.
Very good and clear , I have some notes though : you are very quick and always trying to catch up with the video , I think it would be better if you record your commentary while making the video , and I think lack of mathematics is not always helpful , specially for engineers , mathematics I think eases such topics ! Thank you for the great effort :)
I know, this will sound stupid but let me put my question across. Regarding convolution, you refer to input and the impulse response. In my opinion, input fed to the system was an impulse and system its self is a system represented by a transfer function. Result of convolution which is simply multiplication of input with the system in “S” domain is called impulse response. This is how, I think we should refer to terminology. Why do you refer to the terminology otherwise/
Thanks and good work. A little mistake on the definition of Time Invariance. If y(t)=h*x(t) and y1(t)=h*x(t+a) then y1(t)=y(t+a) is correct for the property.
Your lecture is amazing and you are indeed a great teacher I could not get one thing though. Why transfer functions in s domain are only applicable to LTI systems as you said in your lecture?
You lost me at "full response of the system", 4:32. You're whacking the mass at a few different times with a few different forces. How or why does that represent the full response of the system?
Great videos! I love the quality of your illustrations, so easy to follow! Since you wanted a closed loop, aka feedback it looked to me that your axes were switched on that last diagram about spring force.
Thanks for the video. I have one question though, if all real world systems are non linear, how can we apply LTI theory to design a controller . Unlike the spring many systems do not have large linear operating regions.
I think that the number of videos you post on control systems is exponentially proportional to the number of engineering student that pass their control systems exam.
Well done sir.
I guess im asking the wrong place but does someone know of a method to get back into an instagram account??
I somehow forgot my password. I would love any tricks you can give me!
@Titus Hank thanks for your reply. I found the site through google and Im trying it out now.
Seems to take a while so I will get back to you later with my results.
@Titus Hank It did the trick and I now got access to my account again. I'm so happy!
Thank you so much, you saved my ass!
@Jabari Quinton you are welcome xD
For the spring example, the non-linear region is plastic deformation, the linear region is elastic. Thanks for the great videos, I'm really enjoying them and learning a lot.
Man, your ability to explain a subject is amazing! Thanks a lot for the videos!
Thank you for the nice comment. I hope these videos help you with your chemical engineering classes. The great thing about control theory is that it can be applied across multiple engineering and social science disciplines.
"If you can't explain it simply, then you don't fully understand it" Well, you clearly understand it! Awesome explanations
wow... just wow, this is what my lecturer failed to explain in half a semester. Many thanks! hope to see more coming!
man your academic skill and ability to transfer knowledge with difficult concepts in videos that last less than 10 minutes is amazing. I will not congratulate you on your technical skills on control because there re to many that have them but I will congratulate you that you are able to transfer knowledge with complex concepts in a very small period time... And that is very rare.. So good work and iIhope the best.
Man you are shrinking the life work of great men into minutes!!! Thanks
you are very good teacher
These lectures on Control Systems made my day! Very explicit! Great teaching method!
I am from somalia. I found these lectures very usefull, its almost infinite that how much they helped me. not only this video, i had subcribed to your channel and every day am just fishing for control engineering.
I like the system stability stuff.
By the way thanks for sharing this info.
best on youtube so far. A clearer and sharper mind tends to explain things better.
Hey Brian Douglas,thanks a ton man,thank you so much. These video lectures are simple and the concepts are explained in such an easy manner. I guess the Albert Einstein quote holds so true-"If you cant explain something in the simplest manner,then you haven't understood it thoroughly". My college teachers suck at teaching this and I didn't understand anything in class,but understood everything from your videos.Thanks again.
I believe the last example of the spring, it is plastic deformation that pass the linear region, since the spring will not return to its original form when force is no longer applied
but great lecture!! it is very helpful in tying the concepts to real life situations.
Also, sometimes a system is just too non-linear and you have to design a non-linear controller. Sometimes this consists of complicated non-linear controllers, and sometimes it's as simple as two linear controllers that you switch back and forth between. In that second case the switch is the non-linear part of the control system. Theoretically you could have 10 or 100 linear controllers that you switch between based on the operating region of your system, but this is hard to analyze.
Great class! You are the best teacher that I have seen!
This is a true treasure for control system learners! Thank you
one of the best explanations on the web, thanks !
this is very clear describtion of LTI system. i am chemical engineer , and taking computing for engineer right now , this subject drove me crazy.
Thank you!! You're clear and very well prepared, with both theoretical and practical skills
Huntergotu, that's a good question. Linear systems are good because we know how to solve them. So when you're designing a real world system you try to make them as linear as possible. If you look at the data sheet of sensors (like an accelerometer) you'll notice one of the parameters is 'linearity'. The more linear, then the more accurate your LTI analysis will be. We also add stability margin to designs to protect against what we don't know, including the non-linear terms.
Your lectures are very good!! Thank you very much for sharing this knowledge in a simple way with us...
I am from Brazil and in my university they care more about the solution methods and how solve the problems. We dont have so much time to see the graphics and the explanations that you do in these videos!!!
I am speechless. You are liquid gold, thanks a million
Very clear explanation . I love the graphical representations that you use as well as how you link the systems to the real world. Thank you
I’m a first year undergrad considering what to do after bachelor’s and your videos have been helping a lot in understanding what those master’s modules are about :) thanks a bunch!
thank you so much for making this series, really appreciate how clear and concise your explanations are! the illustrations are really good too
Excellent. Very concise and to the point with useful information.
7:35 the red plot should point downward in the "physically impacted" region, as the force needed to reduced the distance is higher when the coils bench up.
Thank you for your all precious lectures, I couldn't find control theory lecture online, but your video is amazingly helpful to review the contents I learned back in college..
No better teacher on youtube than you
Weili, you are quite right! Thanks for pointing out the error. I've added an annotation to mark the correction.
Brian, maybe numbering the lectures will help people to view them in the right order and thus build up their knowledge gradually. The overview might be a bit overwhelming. Great stuff btw.
Hi, I completely agree with that! Videos are easy to understand but it's quite difficult to figure what the correct order is.
Agreed!
Thank you so much, this lesson was great... You are a great teacher and should become a professor if you are not so already.
Thank you Brian for sharing your knowledge.
Brian , You are a great teacher.
WOW! Thanks for this great video. Please, keep on.
Awesome stuff! I am surprised how simple you have made this topic. Thanks a lot and please continue with this.
Thank you so much. I sincerely appreciate your contribution.
Best control system lecture
Hello Prashant, determining if sin(2t) is an LTI system is pretty straight forward. You can do it by testing it against the definition of an LTI system, mainly the linear part. If sin(2t) is linear then it must have the properties of homogeneity and additivity. For example, we'll write f(t) = sin(2t). Now does f(t+a) = f(t) + f(a)? Or in other words does sin(2t+2a) = sin(2t) + sin(2a)? You'll see that this does not hold and so sin(2t) is not an LTI system.
At 7:07, shouldn't the spring deformation be plastic?
yes
Indeed
came for this, actually the linear, "working region" performs the elastic deformation
Yes. Plus note that the slope around the origin is normally negative as the displacement and the force typically have opposite directions. Also when the coils physically impact, the force ramps up a lot while it becomes way harder to compress the spring, this is the opposite of what he drew. But as much as he is confused about springs, he does a great job explaining the concepts of control theory :)
Its in the elastic region until you bend the spring too much and it goes into the plastic region, thats when the spring doesn't go back to the original shape
thank you for saving my life
Simply amazing explanation...
Great series. Thank You so much for making these videos.
Thank you, Brian your videos have been so helpful!!!!!
Best wishes! x
thank you sir, i think you are magician
Hey Brian, thanks a lot, man, A LOT! These videos of yours really help! Bless you!
Thanking you for your great lecture on LTI systems, this lecture helps me to understand why after all we choose LTI systems. Can you please kindly post another lecture where you can introduce other systems, sorts of problem related to them, how to deal with them if such system comes across, how would it affect us and what should be our approach. Just an insight and no mathematics.
Well Done Brian. I would like to see more matlab and MIMO systems ; the tools for solving these equations are so many. Concepts are difficult. Working with pressure and temperature inputs ; sometimes vibration. 3 inputs one output. some times two outputs.
You are a hero!
you are an awesome teacher
Awesome video !! Thanks a lot for this Brian !!
Great video Brian, thank you!
suggestion for future lectures: the physical meaning, and the influence on the time plane, of the poles and zeroes
Great stuff!
Hi Mr. Brian, your videos made me like this subject, unfortunately our University Teacher is not as proficient in teaching as you, thanks to internet we have an option!
I have a minor commentary regarding the final part of the video, in your spring graph you noted a Elastic Deformation instead of Plastic Deformation.
Have an excellent week.
Best Regards,
Luiz Felipe
Great Explanation.
Mr Douglas . I never really did a mecanical control system but degsiged many power supplies and it is very simalar.
Fantastic video. Thank you so much
you talked about teaching how to linearize a system in "future videos".
But after almost 5 years, I still can't find any video on how to linearize a system?
Thanks a lot Brian❤️
Fantastic! Great explanation :)
4:05 Are we sure that the correct graph for velocity vs time? Wouldn't it be concave downwards?
Another great video
Wow.. Very good.. Well Done
thanks for giving such a practicle examples
#amazing
You re great brian!
I am on my senior year, wish I had seen your videos before.
thank you for moving my competence eigenvalues to the right half plane.
Wait, do you mean the left half plane? Any roots found in the right hand plane are unstable.
Cj Looklin it grows. A joke
@@danielhoven570 I get it was a joke, the punchline doesn't really land. Nice try though!
thank you for making my nightmare a game
Thanks for great videos!
Hi Brian, I love how you explain this stuff. Keep up the good work. I have a question though. Is there a way to linearly follow your material? instead of watching your videos in random order.
Very good and clear , I have some notes though : you are very quick and always trying to catch up with the video , I think it would be better if you record your commentary while making the video , and I think lack of mathematics is not always helpful , specially for engineers , mathematics I think eases such topics !
Thank you for the great effort :)
GREAT WORK
At the end, horizontal curve. it is not elastic but it's plastic deformation.
You are my idol. Thank so much.
I'm 4:40 wouldn't it be different because the body is moving, thus under kinetic friction?
Yes u r really a gr8 teacher
Very Clear
Fantastic! Thanks mate
like is not enough really i loved the video (Y)
Mr. Brian Douglas, do you have a reference book where you have learned all about Control System?
I know, this will sound stupid but let me put my question across. Regarding convolution, you refer to input and the impulse response. In my opinion, input fed to the system was an impulse and system its self is a system represented by a transfer function. Result of convolution which is simply multiplication of input with the system in “S” domain is called impulse response. This is how, I think we should refer to terminology. Why do you refer to the terminology otherwise/
i love you dude
really thank you
Thanks and good work. A little mistake on the definition of Time Invariance.
If y(t)=h*x(t) and y1(t)=h*x(t+a) then y1(t)=y(t+a) is correct for the property.
Hi Doug. What software are you using to write ?
Thank you so much!
Thanks very much.
Your lecture is amazing and you are indeed a great teacher I could not get one thing though. Why transfer functions in s domain are only applicable to LTI systems as you said in your lecture?
Sir, can u explain the ball balancing platform using the control system?
On the hammer impulse graph, the yellow line should return to zero after the red
You lost me at "full response of the system", 4:32. You're whacking the mass at a few different times with a few different forces. How or why does that represent the full response of the system?
Great videos! I love the quality of your illustrations, so easy to follow! Since you wanted a closed loop, aka feedback it looked to me that your axes were switched on that last diagram about spring force.
your concern for explaining is great , it is appearing in correction of mistake in this video
Your English on the other hand, is most certainly NOT great.
good lecture
Perfect!
In order to understand some terms, is "Time Invariance" equivalent with "Controllability"?
Thanks for the video. I have one question though, if all real world systems are non linear, how can we apply LTI theory to design a controller . Unlike the spring many systems do not have large linear operating regions.
brian can you do a state space function lecture? oh and by the way this video is very much helpful
Hi Brain, Can you please upload a video on state observer and SMC controllers, in future....Thanks