Inverse Laplace Transform for a complex transfer function

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Darren Tran
Darren Tran 2019-12-10
回答： Darren Tran 2019-12-30
For my signals project I was able to represent a system using a transfer function consisting of 50 zeros and 60 poles. However, when I tried to get the time domain function of this laplace domain impulse response using ilaplace() with the numerators and denominators as inputs, the code has been running for hours with no end.
I understand that due to the complexity of the transfer function matlab may not be able to find an exact answer. Is there a way to estimate or possible improve the identification of this time domain equation? Thank you
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Walter Roberson
Walter Roberson 2019-12-11
-6.226e14 (+/- 1.801e23) is pretty much a nonsense number, with inprecision 1 billion times larger than the number itself.
Are these numbers coming from the output of cftool (Curve Fitting Toolbox) ?
Shashwat Bajpai
Shashwat Bajpai 2019-12-26
I would be in a better state to help you if the coefficients mentioned are in a MATLAB executable format.

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Darren Tran
Darren Tran 2019-12-30
Hello I have found the solution. The 50 poles 60 zeros method was wrong and I ended up using 2 zeroes and three poles. I then did an inverse laplace and found the original function. Than you everyone for you help.

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