Hi all!

I was interested if there is an objective measure on which modal curvefitter is the most appropriate for fitting a FRF. Should I simply compute MSE (mean-squared error) between the fit curve and an actual FRF or there are more appropriate practices for this? There are different curvefitters, among which LSCE (least-squares complex exponential) and lsrf (least-squares rational fraction) are the most popular MDOF choices in frequency domain. What are the ones in time domain? Should I use time domain or frequency domain curvefitters?

Thanks

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