Simulink Control Design™ - MathWorks

To modify plot settings, such as axis frequency units, right-click on a plot, and select the

corresponding option.

Select Plots Displayed in Simulation Results Viewer

By default, the Simulation Results Viewer shows these plots:

• Frequency Response


• Time Response (Simulated Output)


• FFT of Time Response

To select the plots displayed in the Simulation Results Viewer, choose the corresponding

plot from the Edit > Plots menu. To modify plot settings, such as axis frequency units,

right-click a plot, and select the corresponding option.

Frequency Response

Use the Bode plot to analyze the frequency response. If the frequency response does not

match the dynamics of your system, see “Troubleshooting Frequency Response

Estimation” on page 5-49 for information about possible causes and solutions. While

troubleshooting, you can use the Bode plot controls to view the time response at the

problematic frequencies on page 5-27.

You can usually improve estimation results by either modifying your input signal on page

5-46 or disabling the model blocks that drive your system away from the operating point,

and repeating the estimation.

Time Response (Simulated Output)

Use this plot to check whether the simulated output is at steady state at specific

frequencies. If the response has not reached steady state, see “Time Response Not at

Steady State” on page 5-49 for possible causes and solutions.

5 Frequency Response Estimation