to validate transfer function

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Chennam 2024-3-28

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回答： nick 2024-4-15

i got transfer function from excel now i need to ensure that i got correct transfer function by giving some value as input

(25.03 / s + 0.4309 ) . this is the transfer function that will give square of input. but when i tried in simulink it is showing different value

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Chennam 2024-3-29

移动：Sam Chak 2024-3-29

@Sam Chak this is my problem

Sam Chak 2024-3-29

在 MATLAB Online 中打开

Hi @Chennam Below is the transfer function that has been created. It is designed to generate an output response based on an input signal. What would be the next MATLAB code to be inputted into the transfer function?

s   = tf('s');
G   = 25.03/(s + 0.4309)
G =
 
    25.03
  ----------
  s + 0.4309
 
Continuous-time transfer function.

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nick 2024-4-15

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Hi Chennam,

I understand that you are attempting to determine why Simulink is not displaying the corresponding output value of the sensor. You are inputting the sensor's data into the estimated transfer function, which was obtained with the assistance of the System Identification Toolbox.

As you mentioned, the sensor outputs the square of the input data, which can be described by the following equation: :

This system is non linear and transfer function is defined only for LTI systems. Therefore, the estimated transfer function will contain some inherent errors and will not exactly replicate the values.

You may refer the "Fit" report field in the Report property of the model to know about the "FitPercent" and "MSE". You may refer the documentation to know more about "tfest" :

https://www.mathworks.com/help/ident/ref/tfest.html

Hope this helps.