- There is a zero at s=0 and order can be found by calculating slope of line.
- From the transfer since there is decrease in slope at resonant frequency i.e s=20 there is a pole at s=20, to get order of poles can be found by taking the slope of line.
- Again at s=800 there is change is slope so there is a possibility of zero at that frequency.
Bode Plot and resonant peaks
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Hello,
I'm trying to fit these points to get a bode plot and possible transfer function
w = [0.1 0.2 0.3 0.5 0.8 1 2 3 5 8 10 20 30 50 80 100 200 300 500 800 1000 2000 3000 5000 8000];
G = [0 0 0 0 0 0 0 10 22 28 33 38 35 33 30 28 20 14 8 0 0 0 0 0 0];
I know there is a zero at 2 and the increasing is steeper so started with
"s^2+4*s+4" on the numerator
I know there is a resonant peak at x = 20 but I'm unable to do it.
Also. how to make the bode plot stop at 0 ?
you can find my try here with this transfer function :H=((s^2+4*s+4))/((s+30)^3);
with C = 6750
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/592120/image.jpeg)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/592125/image.jpeg)
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MULI
2024년 5월 28일
I understand that you are trying to get bode plot with the given data.
You may follow these suggestions:
After getting the right transfer function you may use the function ‘bode’ to get bode plot.
You may refer to this documentation link for more information on ‘bode’ function.
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