Simulink Control Design™ - MathWorks

estimation experiment is typically much faster with a superposition signal with satisfactory results. To specify which type of i ...

Step Signals Step inputs are quick to simulate. Like a random signal, a step signal can excite the system at all frequencies up ...

frequencies obtained in the fast Fourier transform of the input signal (see the Algorithm section of frestimate). Superposition ...

estimation block parameter. Any cycles before this window are discarded. Thus, the settling time Tsettle = Texp – NlongestP. If ...

Sinestream Input Signals In frequency response estimation, a sinestream signal consists of sine waves of varying frequencies app ...

Sinestream signals are recommended for most situations. They are especially useful when your system contains strong nonlineariti ...

(In offline estimation, if FIR filtering is on, the software also discards the first estimation period as shown in the illustrat ...

Input Signal > Sinestream when the sample time of the I/Os is continuous. Input Signal > Fixed Sample Time Sinestream whe ...

Number of settling periods — Number of periods to discard for the estimation computation. Number of estimation periods — Number ...

Chirp Input Signals A swept-frequency cosine input signal, or chirp signal, excites your system at a range of frequencies, such ...

The Create chirp input dialog box opens. (^3) In the System list, select linsys1. Click Compute parameters. The software automat ...

Sample time — Sample time of signal. To avoid aliasing, the software chooses the sample time such that the Nyquist frequency of ...

Create chirp input dialog box frest.Chirp property Initial phase (deg) 'InitialPhase' Sweep method 'SweepMethod' Sweep shape 'Sh ...

Modify Estimation Input Signals When the frequency response estimation produces unexpected results, you can try modifying the in ...

(^1) Create a sinestream input signal, in_sine1, as shown in “Create Sinestream Signals Using Linear Analysis Tool” on page 5-39 ...

The selected point(s) appears blue. TipTo select multiple frequency points, click and drag across the frequency points of intere ...

Troubleshooting Frequency Response Estimation When to Troubleshoot If, after analyzing your frequency response estimation, the f ...

This plot shows a steady-state time response. Because frequency response estimation requires steady-state input and output signa ...

How Do I Fix It? Possible Cause Action Model cannot initialize to steady state. Increase the number of periods for frequencies ...

(^2) Modify the properties of the extracted sinestream input signal input2, as described in “Modify Estimation Input Signals” on ...