Frequency-Response Models

Frequency-response models obtained using spectral analysis

A frequency-response model is the frequency response of a linear system evaluated over a range of frequency values. The model is represented by an idfrd model object that stores the frequency response, sample time, and input-output channel information.

Apps

System IdentificationIdentify models of dynamic systems from measured data

Live Editor Tasks

Estimate Spectral ModelEstimate spectral model using time-domain data in the Live Editor (Since R2021b)

Functions

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etfeEstimate empirical transfer functions and periodograms
spaEstimate frequency response with fixed frequency resolution using spectral analysis
spafdrEstimate frequency response and spectrum using spectral analysis with frequency-dependent resolution
idfrdFrequency response data or model
getpvecObtain model parameters and associated uncertainty data
setpvecModify values of model parameters
bodeBode frequency response of dynamic system
bodemag Magnitude-only Bode plot of frequency response
freqrespEvaluate system response over a grid of frequencies
chgFreqUnitChange frequency units of frequency-response data model

Topics