Bode Plots by Hand: Real Constants
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- čas přidán 10. 07. 2024
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This is a continuation of the Control Systems Lectures. This video describes the benefit of being able to approximate a Bode plot by hand and explains what a Bode plot looks like for a simple transfer function; a real constant. This is the first of several videos where I will describe step by step how to estimate a Bode plot from any transfer function.
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!
Holy crap man...I don't think you understand how well you are explaining all of this. My controls class would be so much better if the professor just hit play on your videos and walked out of the lecture hall.
:))
My professor sucks, I´ve learned more with your videos. What's the point of going to college lectures. You're awesome.
+Stewart Fisher MY professor was good but after watching these videos I KNOW WHAT IM DOING :P ... and control system is so interesting now thank you Brain :)
and imagine you had to pay for those lectures on top
11 years later, and students like me are still finding your videos really helpful. Thank you so much for making these tutorias!
Believe me man you are the best teacher I have ever seen in my life . I am so proud of u
Seriously, you're a hero. I'm studying control theory and my professor is pretty good, and your videos serve as a perfect complement to my studies. Thank you sooooo much!
Thank you so much! I'm a mechanical engineering student, and you just explained so eloquently what my prof could not. You have given me hope in passing my final :D
You truly know a subject when you can explain it simply. Good job!
At the time of this comment, I am in second year of my university, preparing for finals and quizzes through your videos. And believe me when I say, your videos are the main reason I am interested in this subject, and the interest keeps developing. Your way of explaining concepts using examples that are easier to understand and comprehend is just amazing. In the years to come, if I decide to become a controls engineer, one of my main inspirations would be you and your channel. Thank you Brian, for these videos, and this channel.
10 years ago, wow, still benefits so many people.
Brian I would like to thank you because your videos helped me a lot. Keep making these videos!! You rock man!!
It's 2022 and your videos are still saving us! Thank you very much!!
You've earned my subscription. As an EE student wanting to become a control engineer, these have been immeasurably helpful. Keep up the good content.
Welcome new guy! :-) I don't always record the videos in the order that makes the most sense to watch them in. So if you go to my channel and click on playlists I've placed them in the correct order. Thanks for watching and for the nice comment.
i'm blown away how ell you teach this. You've got a gift. Thank you for your videos!
I cannot thank you enough. These lectures are immensely helpful.
Ironic how this type of content is much much much more efficient than a real classroom. Here I can pause and rewind where I don't understand and I don't have to worry about my teacher or my classmates :D
I am rediscovering the subject of process control that I studied 30 years ago without the internet or matlab thanks to this videos. I wish I've had them then! Computer programs and good teachers like yourself make understanding process control available almost for anyone with interest to learn about the matter.
Brian's videos are the absolute gold standard in control system lectures. If you are a professor teaching this material and expecting students to come to your class, THIS is the benchmark quality for your lessons. I wish that my student debt was going to you, not my lecturers
This is so good, thanks so much for lectures I actually understand.
Excellent Explanations you explain in 8 minutes what my professor couldn't explain in one hour of lecture ... u rock !!!
BEST VIDEO EVER FOR BODE PLOT, KEEP GOING
This is glorious for cramming! Thank you
very well explained! might just have come a step closer to passing the first year, thank you!
Great! It's because of you I liked to study control systems again
Great Video MAN! Thank you appreciate it.
You are one absolute teacher who makes students think and understand concept that they never forget it.✨
Great class! You are the best teacher that I have seen!
You're changing lives my dude
I am taking the FE exam after 7 years of being out of school. This is helping me a lot. Thanks!
this nice work can be possible only when you love what you are doing......Thank you Mr. Brain.
fluintly,simply also impressive thanks
excellent work. subbed.
Awesome stuff, thank you.
Awesome work. Helpful too.
love the helpfull lectures keep em up :)
Thanks so much, man. You would be a great professor.
i like your fast explanation with quality
Thanx man...your videos helps me a lot. .... one day before the class test of CSE and bang here u are true saviour.... Jokes apart... Really thanx man . keep sharing ur awesome knowledge..
OMG you just explained half a semester to me. It is just amazing , please keep doing what you do and students will keep blessing :D, Thanks a lot, this will help me with my tomorrow's exam :D
You're seriously the best!
thanks, your video help me so much
I just ran onto your Chanel. I'm a 45 year old veteran of systems and find control systems theory a big help in areas you really wouldn't think of a control system. Yes I can do Bode plots without a computer! There is the academic world and there is the real world. Much of my early years in engineering was spent unlearning stuff I was taught in school. One that bit me was learning to inspect equations looking for Sin or Cosine functions in the denominator. Both of these functions pass through zero so you have a divide by zero problem which requires you to bound functions very carefully. Another one is the control systems for "Fly by Wire" fighter planes often have components in the right hand half-plane. How do you handle deliberate instabilities when you were taught to eliminate instabilities? Oh yes, screw up this one and people may die. No pressure!
the fact that such great videos where recorded 11 years ago is mindblowing
I see you're also cramming control just before exam season🤣
@@nathanrischer5379 mine's day after tomorrow lol
9 years later and you'rte still better than my online classes Thank you sir
its amazing sir,,,i am really impressed. I am a student of Masters in control systems at Netherlands. It is very useful for me. Keep posting .Thanks a lot
lifesaver....really helped your videos for my exams.. :)
I LOVE YOUUUU! U SAVED ME
Thank you sooo much! I wish you were my teacher!...heck, you are! Thanks for helping me pass!
Thank you Brian
Brian you are awesome...thanks a lot for sharing your knowing like that. Very good professor
I know this is an old video but thank you so much this was extremely useful and well done
your videos are literally saving my ass for my vibrations final tomorrow, you explain this stuff way better than my professor
You are awesome man!!
Excellent Videos. I'm starting to refer all my Purdue peers to your videos.
thanx a lot sir.. u helpd me a lot..
thanx a lot man, i wish to have it in all subject :)
Hello and thank you for the lectures they are really helpful. I think that in the electrical example of this video, it would be helpful to add an inductive reactance so as to show the phase difference as well. Anyway great work!
so good
These tutorials are unarguably top-notch, you've got some exemplary drawing skills as well.
I'm interested in knowing something off topic, what software (and hardware) are you using to record these tuts, and did you do the voice over later on a speeded up video, or you did it altogether.
hey, thanx for the videos... have been watching for quite some time now... just want to ask what you use to write? its awesome....
what tf did we do to deserve Brain Douglas? Where is your mom, someone give that woman a noble prize
Thanks for the video! I'm having an exam next week and bode plot is really giving me a hard time.
hey brian.. you are a life saver.. it's just amazing how you make all of it sound so simple and easy.. and especially intuitive.. thanks..
I had one query on the bode of constants, you mentioned that '+ve' constants have a 0deg phase. I have noticed in some books they tend to take a '+ve' constants to take 360deg. I presume both are right, but could you explain on it?
cheers
There‘s a third reason:
Computers aren‘t allowed in exams
I know I'm 6 years late but thank you for your work.
You r the bestttt..!!!..Come join our IIT's as a professor..!!
Mr Brian , can you please make a video explaining what is control engineering ? and what would be control engineers' daily tasks .. Thank you
hi, please in future video series..use numbers on topics so new guys can follow from start to end of a topic video series. awesome videos!
Thanks
I'm doing well in my studies.😄👍
Thank you. I'm studying for my Midterm and this is really helping!
Do you think this would be helpful? You can reach the playlist from my channel pretty easily. I guess if I start to have multiple playlists one day it might make navigating through them easier. I'll try to add in the future. Thanks.
Is this the material we will learn in Signals and Systems class?
These videos are great! I would appreciate it if you could slow down a bit though. I have a hard time following the fastness. Thanks again for the video though!
thank u sir
I am not familiar with that calculator. However, an easy workaround is to keep track of the quadrant yourself and just use atan. Then apply negative or positive as necessary. Just draw your point on a unit circle and it should be easy to see which quadrant it's in.
Bless you !
Hi in which video do you explain the s= sigma + j*omega?
Hmmm, I don't think I would use 360 deg for the phase shift of a '+ve' constant. I'm not saying the books are wrong, I just can't think of a reason right now why that would be useful (if you find out somewhere else could you respond again so that I know?) My reasoning is this: to me, an output with 360 phase appears to be the same phase shifted signal as the input, but I would say that it was delayed one whole cycle. A + constant doesn't delay the input at all so the phase shift is 0.
hi i would like to ask how to justify the output is lagging behind or leading by just looking at the graph, this has confused my for quite some time already actually. thank you in advanced for your clarification.
Isn't the laplace transform of a constant function K = K/s???
What program are you using to write digitally?
Man why do I pay for school? Oh yeah I need a degree to get a job.... dammit.
Next up from Google is a diploma from "CZcams Academy"
i always check my cpu usage when you slow the video, thinking my computer is lagging
I know this sort of information is very different to find in any text book. But can you suggest any book for beginners like me?
Thank you very much
This may have already been pointed out, but for completeness, the ARCTAN2 function in EXCEL is atan2(x_component, y_component) or more relevant to this lecture (which is good BTW), atan2(Real, Imaginary)
i do confuse a lot..when the pole is at orizon what is the behaviour of the system..and pls comment on stability..thanks in advance..
hello dear brian
as you said in bode plot by hand tutorial, what is the exact meaning of negative gain, it is not meaningful for me...
regards
I am currently taking automatic controls in college. At 2:11 of this video, it says that the length of the line is the gain of the system. My textbook says that the length of the line is equal to the undamped natural frequency. I feel like I am getting something mixed up here. Can somebody please help?
with the transfer function at the end, how is i(S)/V(S) = out/in?
Going back to the definition of the transfer function being a Laplace Transformation of the impulse response of the system, how do you obtain the transfer function for the "simple electrical example" to be i(t)/R(t) again ???? I'm really confused. :\
Is there a botton on the Casio fx-991ms that is for: arctan2 ?
How did he get the angles for arctan 2(0, k)?
2024 and you are saving me sir
Thank you so much for this, my uni professor is utterly useless in conparison.
Do you have any videos explaining how to go about converting a physical system into an equation in time that you can then put into the S domain? I have no problem with Laplace transforms but struggle to get the right answer when converting mechanical systems into mathematical models.
+Tayfun Yaşar
Yeah I was more asking about the actual process of converting it into a differential equation. The system I had was very complicated.
hi, anything on nyquist plots?
Can I get the PDF file from here? only when it's allowed :)... I wan't from all three part.
In the Phase formula, where did the 2 came from?
I think phase = - arctan(Im/Re)
I am confused , help me
That is the name of the function, arctan2(x/y). As opposed to arctan(x/y), which does not keep track of the sign of x.
So all of this assumes that the plant does not alter the frequency, only phase and gain. What happens when the plant alters frequency? Are bode plots not the representation to use? What is to be done?