pexcit - Level of excitation of input signals

Syntax

Ped = pexcit(Data)
[Ped.Maxnr] = pexcit(Data,Maxnr,Threshold)

Description

Data is an iddata object with time- or frequency-domain signals.

Ped is the degree or order of excitation of the inputs in Data. A row vector of integers with as many components as there are inputs in Data. The intuitive interpretation of the degree of excitation in an input is the order of a model that the input is capable of estimating in an unambiguous way.

Maxnr is the maximum order tested. Default is min(N/3,50), where N is the number of input data.

Threshold is the threshold level used to measure which singular values are significant. Default is 1e-9.

References

Section 13.2 in Ljung (1999).

See Also

advice | feedback | iddata | idnlarx

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