u/Independent_Neat9541

https://preview.redd.it/1cj91f95fazg1.png?width=553&format=png&auto=webp&s=492865a1e7322839c5c673fd33743c4f065e77bd

Hi i got this step response i would like to find a function that i could fit up against
any idea of function that could replicate this response ?
the response is snipped out of a real system response of a Power supply running squarewave signal

i want to fit it and then Laplace transform it to use in some modeling

and below fit 1st order fit but i like to see if possible to find a true fitted function

https://preview.redd.it/m9ps959osazg1.png?width=553&format=png&auto=webp&s=e5667250bf55c067136ff67abe8fe413937c620b