A frequency response describes the steady-state response of a system to sinusoidal inputs. Simulink® Control Design™ software has both command-line tools and a graphical Linear Analysis Tool for estimating the frequency response of your system. You can use the estimated response to validate exact linearization results, analyze linear model dynamics, or estimate parametric models. For more information about frequency response estimation, see What Is a Frequency Response Model?.
Frequency response estimation requires an input signal at the linearization input point to excite the model at the frequencies of interest. For more information, see Estimation Input Signals.
|Linear Analysis Tool||Linearize Simulink models|
|frestimate||Frequency response estimation of Simulink models|
|frestimateOptions||Options for frequency response estimation|
|frest.Sinestream||Signal containing series of sine waves|
|frest.createFixedTsSinestream||Sinestream input signal with fixed sample time|
|frest.Chirp||Swept-frequency cosine signal|
|frest.Random||Random input signal for simulation|
|frest.simCompare||Plot time-domain simulation of nonlinear and linear models|
|frest.simView||Plot frequency response model in time- and frequency-domain|
|frest.createStep||Step input signal|
|frest.findDepend||List of model path dependencies|
|frest.findSources||Identify time-varying source blocks|
|getSimulationTime||Final time of simulation for frequency response estimation|