Stability of Closed Loop Control Systems

Comments · 148

• TO

  @tomasgeorgiou5699 · 9 years ago

  Your voice makes me feel that everything is going to be okay

  318

• EZ

  @Ezurial · 10 years ago

  The night before my final, I was looking at my review sheet feeling absolutely hopeless and was wondering defeatedly to myself what the controller would look like for some sort of cosmic feedback loop where the reference signal was a B+, I was the plant, and the interference was my (poor) decision to take classes at overlapping times, if the system was required to have a rise time < 15 hours, a steady state error <5%, and no requirements on overshoot.  It turns out that controller looks like a guy with sunglasses and a beard, and is named Brian Douglas.

  74

• TH

  @TheJq32 · 11 years ago

  You are benefiting humanity so much. That's about the best compliment I can think of. Thank you.

  71

• RE

  @redrounin1440 · 6 years ago

  12 minutes and I understand what we've been doing in my controls class for the last eight weeks. I wish I could take my tuition back and pay it directly to you.

  24

• NI

  @nimeshsingh9271 · 5 years ago

  "Necessity is the mother of all inventions."

  2

• PI

  @pirlyet · 10 years ago

  You explain these concepts much more easily than my teacher... Thanks!!

  17

• BG

  @BG-bt5mv · 5 years ago

  This one video will change the level of under standing of classical control theory for new learner. Excellent video!

  1

• DD

  @ddansdaman · 5 years ago

  You're a bloody legend aren't you Brian. Thanks for all of your fantastically well described and illustrated lectures!!!!

  4

• BR

  @BrianBDouglas · 13 years ago

  Check out Timofte's post just above this one for figuring out how to calculate the TF for a mass moving across on a frictionless table. In order to look this up you'd have to realize that this is a mass-only translational mechanical system and then look up the TF for that.  Hope that helps.

  3

• JA

  @jacqueswaldmann3478 · 5 years ago

  At <a href="https://www.youtube.com/watch?v=yf09OrHa520&amp;t=586">9:46</a> the open loop poles include s=zero; thus the open loop is not stable in the BIBO-sense: a &nbsp;step input will cause the open loop to output a ramp. Just a minor observation. The video is excellent.

  3

• AL

  @Alucard_0_0 · 1 year ago

  Bro this is good it&apos;s like getting premium lecture..... Very deep explanation and nice. Thanks

  1

• BR

  @BrianBDouglas · 13 years ago

  Thanks Dennis. I would love to put out some videos eventually covering all engineering aspects of control theory. &nbsp;I can&apos;t promise anything right now because I have recently started at a new company and I am devoting most of my time to understanding the system (as you can see I haven&apos;t posted a video in a while). &nbsp;I&apos;m hoping to take a few more weeks off and then start back up again. &nbsp;I appreciate your comment and I hope I can help you out in the future.

  18