I'm a little confused on how rlocus() is implemented and it might be a source of my problem. rlocus() in MATLAB assumes a gain in the feedback portion and you must choose the forward-feed system as described in MATLAB's rlocus() help page. Every textbook I have seen always places the gain K in the feed-forward (open loop) part of the diagram. I am trying to find values of K for my system which is in the form given by most textbooks, but it appears that MATLAB is defining where gain K is differently and I believe is what is giving me wrong answers. I am curious as how you've gotten yours to work.
it does not effect the system as the characteristic equation will remain the same which is used to plot the transfer function although transfer function will not be the same but we dont need transfer function we need characteristic Equation to plot the root locus and it remains the same
you can verify that by ploting closed loop transfer function of the system in example and closed loop transfer function of the matlab diagram .The characteristuc equation will remains the same so it wont effect our result ;)
I'm not sure why you are plotting rlocus(T) because rlocus(G) ARE the closed loop root loci already. You can determine what happens to the roots of the closed loop function as K is varied simply by looking at rlocus(G). rlocus(T) does not add anything.
It has to. Because as long as you have real numbers for K, and it applies in real time, the root locus is symmetric about the real axis, and all imaginary points on it are conjugate pairs. If it has multiple K-values at which it crosses the imaginary axis, usually we are interested in the lowest K-value, at which the FIRST pair points on the root locus cross the imaginary axis. We are interested in the cutoff when the poles of the CLTF initially start all on the left side of the plane where they are stable, and how large we can make K, so that the first pole or conjugate pair of poles crosses the real axis. In other words, the maximum K-value for stability.
thanks sir ,before watching ur video i searched many videos on youtube but not satisfy but now everything is clear
A nice and simple example to help us grasp into the basics of plotting root locus diagram.
feels like a god is talking to me from above, that sound, hehe, thanks sir!
lol. I got a better mic now, but now the problem is you can hear my breathing from 5 feet away lol.
AllAboutEE
ahaha gd mic captures small stuffs but i tink u can edit the sensitivity if u haf realtek
thank you man, i had the same question. Straight to the point
thanks for the vid, now im able to finish my control system lab
Dude you saved me big time❤️
I'm glad I did, I made these videos so people wouldn't struggle like I did
Helped me with homework! Thanks!
thanks for the video, but how do i insert the denominator if its complex number
Thanks man. Really..
Thank you that was really helpful..
thank you so much
Thank you sir
Thank you!!!
I'm a little confused on how rlocus() is implemented and it might be a source of my problem. rlocus() in MATLAB assumes a gain in the feedback portion and you must choose the forward-feed system as described in MATLAB's rlocus() help page. Every textbook I have seen always places the gain K in the feed-forward (open loop) part of the diagram. I am trying to find values of K for my system which is in the form given by most textbooks, but it appears that MATLAB is defining where gain K is differently and I believe is what is giving me wrong answers. I am curious as how you've gotten yours to work.
it does not effect the system as the characteristic equation will remain the same which is used to plot the transfer function although transfer function will not be the same but we dont need transfer function we need characteristic Equation to plot the root locus and it remains the same
you can verify that by ploting closed loop transfer function of the system in example and closed loop transfer function of the matlab diagram .The characteristuc equation will remains the same so it wont effect our result ;)
Isnt it open loop transfer function ?
I'm not sure why you are plotting rlocus(T) because rlocus(G) ARE the closed loop root loci already. You can determine what happens to the roots of the closed loop function as K is varied simply by looking at rlocus(G). rlocus(T) does not add anything.
thank you
What if it’s touching the IM axis twice
It has to. Because as long as you have real numbers for K, and it applies in real time, the root locus is symmetric about the real axis, and all imaginary points on it are conjugate pairs.
If it has multiple K-values at which it crosses the imaginary axis, usually we are interested in the lowest K-value, at which the FIRST pair points on the root locus cross the imaginary axis. We are interested in the cutoff when the poles of the CLTF initially start all on the left side of the plane where they are stable, and how large we can make K, so that the first pole or conjugate pair of poles crosses the real axis. In other words, the maximum K-value for stability.
Dude did you recorded this while taking a crap in a restroom?
Don't try American accent