Transfer function of the highly distorted system; impact hammer testing and frequency response of the system
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Hello, everyone!
For couple of weeks now, I am dealing with transfer function estimation. The system which I am currently examining is highly distorted at high frequencies due to its structural dynamics. I analysed its frequency response and it is getting really messy above 2,5 kHz.
![Graph - H.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/236898/Graph%20-%20H.jpeg)
I want to compensate this system with the use of the transfer function. I have some input and output data (attached you will find the graph illustrating input and output signals). It has been carried out by means of the impact hammer testing. To cut the long story short: input - hammer hit, output - response of the system (oscillations).
![Data.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/236899/Data.jpeg)
I tried to handle it with the System Identification Toolbox. What I got so far is:
![2d.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/236900/2d.png)
Could you please provide me with any hints how to get this function into time domain? The aim of my work is to reproduce the input signal without the distortions.
Thank you very much for any feedback.
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Raj
2019-9-4
Not sure why you took the trouble of posting so much details. From what I understand, the one line question is that you have got a transfer function in 'S' domain and you want to convert this to time domain. You can use the ilaplace command to do that.
Note: You should have symbolic math toolbox in order to use this.
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