Simulink Control Design™ - MathWorks

In the Add frequencies dialog box, specify 15 logarithmically-spaced frequencies ranging

from 50 Hz to 5 kHz.

Click OK

To ensure the system is properly excited, set the amplitude at all frequencies. If the input

amplitude is too large, the boost converter will operate in discontinuous-current mode. If

the input amplitude is too small, the sinestream will be indistinguishable from ripples in

the power electronics circuits. Both situations produce inaccurate frequency response

estimation results.

To set the amplitude, first select all the frequencies in the plot area. Then, in the

Amplitude field, type 0.01.

7 PID Controller Tuning