Nichols Chart, Nyquist Plot, and Bode Plot | Control Systems in Practice

Ғылым және технология

Explore three popular methods to visualize the frequency response of a linear time-invariant (LTI) system: the Nichols chart, the Nyquist plot, and the Bode plot. Learn about each method, including their strengths and weaknesses, and why you may choose one over another.
Find out how each plot presents the gain and phase shift of an LTI system across frequency, and discover how the different ways to present the information can help with system identification and closed-loop controller design.
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Пікірлер: 64

  • @MOBATSim
    @MOBATSim3 жыл бұрын

    Nichols Plot is actually very useful if you have a multi-body system of a very high-order where you need to make sure that all the Eigenfrequencies and Eigenmodes of the system or bodies attached with springs and dampers stay in stable regions. Loop shaping is more intuitive by shifting these curves left and right by also using a combination of controllers such as combining a PID with an Anti-Notch filter simply by knowing their effects on Nichols Plot and adjusting the critical frequencies of the controller parameters.

  • @motivationalshorts3801

    @motivationalshorts3801

    2 ай бұрын

    can you help me like how to draw the graph of amp vs time @ 8:10 for a step response(in matlab)

  • @thomashunger139
    @thomashunger1393 жыл бұрын

    Enforcing lectures with Brain Douglas lessons since nearly 2 years ago. Now, starting lectures about plotting Nichols Charts from Bode Plots. Video posted 3 days after... I'm very lucky haha. Thanks.

  • @nidhishpanchal3517
    @nidhishpanchal35173 жыл бұрын

    the best Brian Douglas

  • @saadfareed1075
    @saadfareed10753 жыл бұрын

    I like Bode plot bcz i understand them well...And Thank You for such a great video.

  • @user-saint
    @user-saint Жыл бұрын

    Thank you sir, you give me a clear concept.

  • @martinarraztio
    @martinarraztio3 жыл бұрын

    Very well explained

  • @feras6471
    @feras64712 жыл бұрын

    Perfect explanation, thanks...

  • @hayatabbas4732
    @hayatabbas47322 жыл бұрын

    Great explanation . Thanks

  • @malkaltayyab9765
    @malkaltayyab9765 Жыл бұрын

    that man was right about forgiving him for adding trouble to understand with his speed! Man I have never lagged so much in my entire life. but that reminded of a meme, "SAY THAT AGAIN BUT SLOWLY", which is when I realized I could reduced the speed of video, at 0.75x. AND Man I understood! Thank-you MATLAB and Brian

  • @DLexEdition
    @DLexEdition2 жыл бұрын

    I use Bode and Nichols most often, only used the Nyquist in school.

  • @josephma5961
    @josephma59613 жыл бұрын

    Nice one Brian

  • @hello_world_787
    @hello_world_7878 сағат бұрын

    I agree that Nicholas plot is the best.

  • @andrealmeida_
    @andrealmeida_2 жыл бұрын

    Brian, could you make a video about Bode Plots as a tool for controller design and stability margins in discrete systems (Z domain) in Matlab? Thank you so much for your videos, you're the best!

  • @nated1971
    @nated19713 жыл бұрын

    Well, this would have been helpful yesterday......before my Control Systems final ;)

  • @EMRLaboratories

    @EMRLaboratories

    3 жыл бұрын

    You're not supposed to be watching control videos AFTER your final. You're supposed to be core dumping everything you learned during the term to make room for next term!

  • @nated1971

    @nated1971

    3 жыл бұрын

    Core dump complete; except for Microwave Engineering. Need that for later

  • @malkaltayyab9765

    @malkaltayyab9765

    Жыл бұрын

    @@nated1971 man I can feel your pain.

  • @PunmasterSTP

    @PunmasterSTP

    Жыл бұрын

    I know it's been a year, but I just came across your comment and was curious. If I might ask, how'd the final turn out?

  • @nated1971

    @nated1971

    Жыл бұрын

    @@PunmasterSTP I got an A; my Control Systems professor was amazing

  • @mainnevent515
    @mainnevent5153 жыл бұрын

    Thank you so much

  • @REOsama
    @REOsama Жыл бұрын

    Very useful thank you

  • @tendi.rutsate
    @tendi.rutsate Жыл бұрын

    Thank you so much!

  • @muhammedabdullah4110
    @muhammedabdullah4110 Жыл бұрын

    really appreciated and keep doing

  • @blessoneasovarghese9834
    @blessoneasovarghese98343 жыл бұрын

    Please make a video on PID tuning methods too......

  • @kwinvdv
    @kwinvdv3 жыл бұрын

    Another upside of the Nyquist plot is that one does not have to worry about phase wrapping. While phase wrapping could cause confusing in a Bode plot or Nichols chart, especially when dealing with noisy experimental frequency response data.

  • @SMV1972
    @SMV19727 ай бұрын

    Столько узнал за один короткий урок. Спасибо огромное!

  • @BrianBDouglas

    @BrianBDouglas

    7 ай бұрын

    Спасибо!

  • @gokhankiremit4322
    @gokhankiremit43222 жыл бұрын

    Hi thank you for video it is very helpful. I have input and output experimental data from time domain with constant frequency. For example, 0.01 rad/s, 0.1 rad/s, 1 rad/s, 10 rad/s. How can I convert these datas to frequency domain and plot bode ?

  • @Amine-gz7gq
    @Amine-gz7gqАй бұрын

    At 6:16 what does "lighty damped mode at 1 rd/s" mean ? At 1rd/s we have the highest gain what's damp got to do with it ?

  • @warzonecod1002
    @warzonecod1002 Жыл бұрын

    You meantion Links in the description, I do not see any links to read further on the topic :(

  • @user-yn9br1uo2q
    @user-yn9br1uo2q11 ай бұрын

    Türkçe alt yazı ekler misiniz. Perfect explanation, thanks....

  • @kubigaming3606
    @kubigaming36063 жыл бұрын

    am i right? if we want to check stability margins of our Control System we use those plots for open-loop systems and when we want to check for example BW(bandwidth) of our Control System we check closed-loop system?

  • @EMRLaboratories

    @EMRLaboratories

    3 жыл бұрын

    No. Stability of either an open loop or closed loop system can be checked with these plots. Presumably in many interesting control situations the open loop plant is unstable and the closed loop system makes it stable - you would generally apply this to closed-loop systems - he changes the plots with gain so you can see the changing margin. Bandwidth is the -3dB frequency.

  • @user-vi3pi9rf7w
    @user-vi3pi9rf7w3 жыл бұрын

    First time hearing Nichols plot

  • @bugrahana3395
    @bugrahana33953 жыл бұрын

    I think that you have to add mikhailov plot actually

  • @RoboGenesHimanshuVerma
    @RoboGenesHimanshuVerma3 жыл бұрын

    But how will we obtain the Nyquist plot of Unstable system experimentally?

  • @malkaltayyab9765

    @malkaltayyab9765

    Жыл бұрын

    with open loop transfer func; as an input.

  • @hassanvakani5324
    @hassanvakani53243 жыл бұрын

    What do you mean by minimum phase? As in minimum shift in phase over the change in frequencies?

  • @BrianBDouglas

    @BrianBDouglas

    3 жыл бұрын

    I explain it here kzread.info/dash/bejne/nHt5zc99gtbXj7A.html

  • @hassanvakani5324

    @hassanvakani5324

    3 жыл бұрын

    @@BrianBDouglas thank you. Your explanation is on point. Probably the clearest to understand the intuition behind the idea of frequecy sweep.

  • @hidennseek1483
    @hidennseek14834 ай бұрын

    13:50 When I right click there I don't get the same menu and I tried everything I just don't have these options. Any idea how to get the ''All stability margins''?

  • @BrianBDouglas

    @BrianBDouglas

    4 ай бұрын

    Hmm, what version of MATLAB are you using? Do you see a menu at all and what options do you have?

  • @indramal
    @indramal3 жыл бұрын

    Brian

  • @JLveryToxic666
    @JLveryToxic6669 ай бұрын

    i dont understand, why (-1,0) is unstable?

  • @2008yaj
    @2008yaj2 жыл бұрын

    Wow!

  • @motivationalshorts3801
    @motivationalshorts38012 ай бұрын

    can anyone help me like how to draw the graph of amp vs time @ 8:10 for a step response(in matlab)

  • @BrianBDouglas

    @BrianBDouglas

    2 ай бұрын

    When I add links to comments they get rejected so instead, search for "step function MATLAB" and you'll see how to generate the step response of a dynamic system using the command step().

  • @meryemcavlan50
    @meryemcavlan503 жыл бұрын

    Türkçe alt yazı ekler misiniz

  • @kasparskroics9508
    @kasparskroics95083 жыл бұрын

    I prefer Bode plott

  • @dineshguleria1945
    @dineshguleria19453 жыл бұрын

    Is it Brain Douglas..??

  • @user-vi3pi9rf7w

    @user-vi3pi9rf7w

    3 жыл бұрын

    Yup, The best.

  • @BrianBDouglas

    @BrianBDouglas

    3 жыл бұрын

    👋👋👋

  • @dineshguleria1945

    @dineshguleria1945

    3 жыл бұрын

    @@BrianBDouglas hi brain can you group your video to create separate playlist on your channel .. I found you did for control system in practice, sensors, state space.. for MATLAB channel.. it will be easier to trace these videos through your channel..!!

  • @BrianBDouglas

    @BrianBDouglas

    3 жыл бұрын

    @@dineshguleria1945 I link to all of my MATLAB Tech Talk Videos at engineeringmedia.com/videos. They are grouped ... but not in a playlist.

  • @dineshguleria1945

    @dineshguleria1945

    3 жыл бұрын

    @@BrianBDouglas very nice.. learner a lot .. from your videos... Helped to make a strong foundation on a control system..

  • @Parende-fl9sn
    @Parende-fl9sn2 ай бұрын

    make sure that all t

  • @WarzEdits
    @WarzEdits3 жыл бұрын

    bienvenue les gens de SCL

  • @luismesquita8202
    @luismesquita82023 жыл бұрын

    Video on PID control: kzread.info/dash/bejne/aWWjls5_gqXAns4.html

  • @jamesretreat
    @jamesretreat2 жыл бұрын

    so this is what my GARBAGE professor was trying to explain!!!

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