Simulink Control Design™ - MathWorks

estimation block parameter. Any cycles before this window are discarded. Thus, the

settling time Tsettle = Texp – NlongestP. If you know that your system settles quickly, you can

shorten Texp without changing Nlongest to effectively shorten Tsettle. If your system is noisy,

you can increase Nlongest to get more averaging in the data-collection window. Either way,

always choose Texp long enough for sufficient settling and sufficient data-collection. The

recommended Texp = 2NlongestP.

To use a superposition signal for estimation, in the Frequency Response Estimator block,

set the Experiment mode parameter to Superposition. For details, see Frequency

Response Estimator.

See Also

frest.Chirp | frest.Random | frest.Sinestream | frest.createStep |

frestimate

More About

• “Sinestream Input Signals” on page 5-37


• “Chirp Input Signals” on page 5-42


• “Estimate Frequency Response Using Linear Analysis Tool” on page 5-7


• “Estimate Frequency Response at the Command Line” on page 5-18

5 Frequency Response Estimation