MATLAB Answers

Inverse laplace - symbolic tool box

4 views (last 30 days)
Hi,
I'm trying to perform inverse laplace on the transfer function but could not be able to get an answer.
I have let it run for more than 12 hours and still no results.
Can you please help here. Please find the attached file.
There was a mistake in earlier attached file.

  0 Comments

Sign in to comment.

Accepted Answer

Dimitris Kalogiros
Dimitris Kalogiros on 30 Oct 2019
Edited: Dimitris Kalogiros on 30 Oct 2019
I had a look at your file.
The definition of the laplace transform A contains a syntax error. It has an extra "=" without meaning. So, first of all you must correct it.
A second issue is that, for such a complicated function of "s", it is extremelly difficult an inverse laplace transorm to be found. I suggest to give values at your parameters before the calling of the ilaplace() function.

  7 Comments

Show 4 older comments
Jochen Baier
Jochen Baier on 31 Oct 2019
Please find the attached. You will find more details
Walter Roberson
Walter Roberson on 31 Oct 2019
Zc=(Rpc/((s*C*Rpc)+1))+(s*Lc)+Rsc);
has bad )
Perhaps you meant
Zc=(Rpc/((s*C*Rpc)+1)+(s*Lc)+Rsc);
If so then the iplace(tf) is calculated quickly. It does, however, involve the sum of 5 roots of a quintic, and that is something that has no closed form solution in "algebraic numbers"
Jochen Baier
Jochen Baier on 31 Oct 2019
Thanks for the explanation. I'll reduce the order and see.

Sign in to comment.

More Answers (0)

Sign in to answer this question.