A Better Way to Think About a Notch Filter | Control Systems in Practice

Sir, Nice video on Notch filter, can we have video on how to design plant transfer function having rigid and flexible modes of frequency and then designing a notch filter to reject the flexible mode frequency

how can we get the code you used for matlab

Hi Brian, I just stumbled upon your video of the notch filter. Your explanation is just brilliant! I have been teaching control theory for a long time but this is the clearest presentation I have ever seen. The use of Matlab control design brings it totally alive. Instead of students using the DSP toolbox to design a notch filter without understanding the logic behind it, they should look at your video. Two thumbs up!

Great

thank you Brian I owe you all I know

Many thanks for explanations.

I am play guitar as a hobby. I have a Stratocaster whose coils generate a Hum. Thanks to your video I was able to eliminate it. Thank you so much.

I've just successfully implemented a geometric tracking controller on parrot mambo. Thank a notch added in the correct place, the controller works very fine on a real parrot mambo.

Inverse of a notch filter is a digitally realizable oscillator.

😄😄😄😄

Thank you Douglas! I like how you explain and make the subject clear to us.

Hi, i had a question. If i'm getting things right you derive a Notch filter from a Band stop filter. Is it also possible to derive a kind of "Inverse Notch filter" from a Band Pass filter in the same way ? Greetings

OK I get it! Good job!⚡☻⚡

Brian, I'm seeing a problem: whenever I use "a" to adjust the width, there's a limit. The ratio cannot be less than 1 or the width starts widening again. Try it in Matlab. Set a = 2, a =1, a = 0.1. In fact, if you use a = 2, and then a = 0.5, they're right on top of each other because they're reciprocals. So, how can we get around this?

I prefer to also write the denominator in terms of natural frequency and damping coefficient. The attenuation at the natural frequency of the notch filter then simply becomes the damping coefficient in the numerator divided by the damping coefficient in the denominator (assuming both use the same natural frequency).

Great video !

Thank for this video and, please, keep them coming!

Thanks for great videos.