What Is Robust Control? | Robust Control, Part 1

[@Ayahalom123]

Always a joy to hear brian explaining any topic!

[@BrianBDouglas]

Thanks!

[@mohammadebrahiminejad8757]

NO ONE ELSE KNOWS HOW TO TEACH CONTROL ON THIS PLANET EXCEPT BRIAN DOUGLAS! he is like the god of control professors to me.

[@joshuamitchell2275]

check out Steve Brunton

[@AlexandreEmanuelle]

you just opened my mind in how do we calculate things as we have complex variables included. tks buddy.

[@BrianBDouglas]

I'm glad this helped!

[@victorcovasan9155]

Thanks Brian, we've been looking forward to a series on robust control

[@BrianBDouglas]

Thanks! I hope you enjoy it. I've finished the next 4 videos in this series and I'm really happy with how they've turned out.

[@ogunsadebenjaminadeiyin2729]

Thanks @Brian Douglas I'm looking forward to seeing the new videos.

[@rzwnhmd]

Thank you for these Tech Talk series with Brian

[@prakashgautam7229]

Brian your explanation is phenomenal.

[@zitaihuang6148]

Jesus I love you Brian it's time for some robust control!

[@coolblogger8209]

Hi your lectures are very intuitive and easy to understand. Kindly also make videos on Model Predictive Control (MPC) and Robust MPC

[@radrianm5]

this is the best place to learn control engineering

[@blackboardradio343]

Thank you very much Brian that you are sharing your videos and knowledge and you are here in this world! God bless you and your family!

[@faheemgulzar04]

Brian please do video on loop shaping, Hinfinity and H2 controllers

[@sirleelee]

Thanks Brian, will presented.

[@momoduduboytaylorjr.6517]

Thanks for the eye opening

[@40NoNameFound-100-years-ago]

I hope you will include H-inf controller in the next upcoming videos 😊

[@sugumarprabhakaran]

Great video and very intuitive explanations. Thank you!

[@leukefilmpjes9681]

7:36, how do you go from the phasemargin at a certain frequency to delay in timedomain? Thanks in advance!

[@Antonioqwert3868]

Hi, Brian your videos about control theory is great , I hope you will talk about MPC controller :)

[@huuthinho8406]

really informative and useful

[@hessmanuel]

Hey Brian. Nice video. This is exactly the subject I need for my work. When will the videos for H-infinity controll be released? That would be good to know if I have to inform myself about other sources or if the videos will be released in the next few days. I would be really happy to see your videos, because they are very illustrative.

[@ogunsadebenjaminadeiyin2729]

I am an anglophone and francophone, I'd like to advocate for a French subtitle in order to make the video profitable for francophones. Thank you for this great video @Brian Douglas

[@imanplus]

Please make a video on LPV control.

[@smozer]

Thanks Brian, really good job! Any chance to share the live script?

[@BrianBDouglas]

Sure, I just posted it to my GitHub. github.com/aerojunkie/control-tools/blob/master/classical_margins.mlx

[@smozer]

Thanks​@@BrianBDouglas

[@tsehayenegash8394]

I have a temperure data, how can I robust this data? thank yoy

[@danawen555]

thanks!!!! very good vedio!

[@dimasmulyaputra5038]

Hello brian and everyone, I just learned about this topic "robust control ', can you please tell me a reference that is easy to understand about this robust control, Thanks for the great video!

[@dimasmulyaputra5038]

A Book or something about Theory and Practical, thanks

[@Choice7890]

Can someone tell what’s the benefit of the generalized plant representation? Couldn’t find any intuitive explanations

[@alexanderskusnov5119]

There are cases (big gain or delay) when PID control output (u) changes fast between 0 and 100%. What if we add bounds for its speed (u-dot)? Is it a robust method?

[@aldikroos6290]

In 7:35, why does 70deg of Phase margin equal to 3 second time delay?

[@ricardoolaguivel4958]

First convert the value 0.406 from rad/s to deg/s ... then divide 69.8 deg to the converted value, with that you obtain seconds, in this practically 3

[@wk961]

I often wondered how manufacturers designed controllers for mass produced goods. The answer is robust controllers.

[@kwinvdv]

I have never heard of disk margin. Is this similar to the modulus margin?

[@BrianBDouglas]

It is similar in that they are related to the shortest distance between the Nyquist curve and the -1 point, but there is more to disk margin than that (for example, you can skew the disk center. You may want to do that if you believe you have more uncertainty in one direction over another.) The next video is on Disk Margin and will explain it in more detail :) Although, I removed the section where I showed how the inverse of the disk is related to the -1 point on the Nyquist plot. So, maybe a better option would be to check out the original paper here: arxiv.org/abs/2003.04771

[@LIVERPOOLFRANK]

Brian, any chance one day we can have some hardware in the loop lab?

[@ricardoampudia1633]

In this video he designs a real controller with hardware in the loop: kzbin.info/www/bejne/g5PbZnyDfqiGlbs

[@blackboardradio343]

Hi, Anyone who could answer how the Pm=69.9 deg (at 0.406 rad/s) is equivalent to appr. 3 sec. Please look at the video at 7:35. Thank you very much for your help and support!

[@ramiveiberman3182]

Since the frequency w=0.406 rad/s we can deduce that the period T=2*pi/w=15.6 sec. Here comes the cool part. Phase margin of around 70 degrees means that the sine wave gets shifted by 70 degrees. Since each 15 sec period has 360 degrees we can reach the conclusion that delay= T*PM/360=3.02sec

[@closingtheloop2593]

Brian?

[@BrianBDouglas]

Hi 👋

[@closingtheloop2593]

@@BrianBDouglas Dude you saved me in undergrad controls. How do I buy you a beer?