How to find R,C,L model parameters based on current measurement of a step response?

Hello,

I am looking for an approach to find the R,C,L elements of a 5RC model based on a current measurement where a step response is applied to the component.

My basic idea is to transform the 5RC network via Laplapce, reformulate it to find the time domain current expression, and then use Matlab to fit this equation to the measured current waveform.

I know this is a more electrical engineering topic, but I would appreciate your help in finding keywords or other approaches to solving this problem.

Attached is the measured current signal as a .csv and a picture of the network

Many thanks in advance

With kind regards Bernd

[Mathieu NOE]

hello

I have some serious doubts that you can determine all the RLC elements with only one current masurement

there are more unknows than measurement points

Answer 1

[Jon]

If you have the System Identification Toolbox, you may be able to use the "graybox" system identification techniques for this purpose. https://www.mathworks.com/help/ident/ug/estimating-linear-grey-box-models.html

As @Mathieu NOE suggests I am not sure if you can get a good solution to find all of those unknown parameters with just a step test, you may have to provide a more informative excitation to your system.