Control Systems Lectures - Transfer Functions

This lecture describes transfer functions and how they are used to simplify modeling of dynamic systems. 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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[Mr.Feckless]

In case you see this Brian, thank you so much I really appreciate what you do.

[Spenocracy]

I have gained better understanding of control systems in 1 hour of watching these videos than I have in an entire semester at university and reading half a text book. Makes me really wonder where my tuition is going.

[crazyace]

Before Youtube and Wikipedia, how did anyone even pass an engineering degree?

[sujithrao]

Brian Douglas!!. I bow down to thee. Why cant professors with all their knowledge explain it so simply the way you do!

[AthanCondax]

This is the 5th or 6th video I've watched from you tonight. I think they're incredibly helpful. You speak and write clearly and your pre-recorded writing makes for a fast and easy-to-understand learning experience. You're truly interested in making us understand the general material rather than a single example. This helps viewers make connections and encourages them to apply their knowledge in a global scope, rather than memorize a formula for a closed set of applications. In my opinion, this is what makes for a good teacher and I'm grateful your videos exist and encourage you to keep posting and recording. The Root Locus videos were especially eye-opening.

[BrianBDouglas]

mooeoo, thanks for the comment. I would like to do a video on Laplace transform and one on Fourier transform. They are two very important concepts in controls and are worth some time spent really understanding them. I've got them in my plan in the first few months of next year so keep following the channel. Thanks!

[BrianBDouglas]

Also, as far as deriving the equation of motion, you can search wikipedia for harmonic oscillator. But the gist is this. Use Newton's second law, F = ma. F is the sum of all of the forces on the mass, i.e. F = u(t) + [-k*x(t)]. The spring term is negative because the force acts in the opposite direction of motion. Set F equal to ma or u(t) + [-k*x(t)] = m*x''(t). Then just combine the x terms on the left side of the equation and you're done. Hope that helps.

[soijiro]

Simply, you are the best Brian! greetings from Norway!

[BrianBDouglas]

Thanks for the suggestion. I made a playlist, although so far it's just all 7 videos in the order that I've posted them. In the future I'll probably go back and add videos that fit in between two I've already made so I like the playlist idea.

[samuelgershon]

Hey Brian, i just wanted to thank you. I finished uni 5 years ago and have been working mainly on aerospace structures, but now i have to work on control systems and your lectures are life savers! You are a very clear and very good lecturer.

[thomaschiesa]

FANTASTIC LECTURES!  I am an electrical engineering major, I take a bunch of signals classes and your lecture series definitely helps to clear up many concepts that I wasn't able to understand previously.  Much appreciated, truly excellent work, thank you for your time and effort !

[andreadanniballe]

This is the best explanation I've ever found! I wanted to have you as control systems teacher! May God bless you man!

[anandsudhi]

thank you for your effort in making the lectures as practical and intuitive as possible. The lectures considerably increased my interest in this subject. Keep up the good work.

[basyoni]

I don't know if you'll read this or not but I just wanted to thank you, for what you are doing, helping troubled students all over the world, I'm from Egypt btw and I'm not that scared of the exam now that I found your channel, I only wish that we had professors who are as half good as you are. Thanks man :)

[Saintaubynlive]

It is  my aim to travel around the world and understanding these lectures will take me there

[EngineeringSimplified]

Loved the definition of the transfer function. It has everything that is to know about transfer functions in it and is concise.

[chevali]

This is the first time I fully understand the significance of the Laplace transform and the transfer function. Thank you Brian, keep on the good work.

[asherwood]

This channel is a God send. Many thanks from a suffering Industrial Engineering student.

[themikemachine]

These series are immensely helpful! I took a controls course a few years back, and even though I got an A, I did not understand anything nearly as well as I do now! I guess it was easy to plug and play the equations. Now I feel I can actually put my knowledge to good use if I need to!

Thank you for this service to humanity.

[fonabel]

I have watched this more than 10 times, Each is a new knowledge gained.