In either mode, when you use the block in a closed-loop configuration, frequencies much
higher than the open-loop bandwidth might result in less accurate estimation.
Tips
This parameter is not tunable. To provide frequencies after deployment, set Excitation
Signal Source to External ports and use the w input port. For more information, see
“Deploy Frequency Response Estimation Algorithm for Real-Time Use” on page 6-11.
Dependencies
To enable this parameter, set Excitation Signal Source to Block parameters.
Programmatic Use
Block Parameter: Frequencies
Type: vector
Values: positive real values
Default: '[0.5 1 2]'
Frequency units — Frequency units
rad/s (default) | Hz
Indicate whether the values of the Frequencies parameter are in radians per second or
Hertz.
To enable this parameter, set Excitation Signal Source to Block parameters.
Programmatic Use
Block Parameter: FreqUnits
Type: string, character vector
Values: 'rad/s','Hz'
Default: 'rad/s'
Amplitudes — Amplitudes of injected perturbations
1 (default) | scalar | vector
Specify the amplitudes of the perturbation signals injected into the plant. To use the same
amplitude for all frequencies, specify a scalar value. If you know that the response
changes significantly over range of frequencies to estimate, then you can use a vector to
specify a different amplitude for each frequency. For instance, you can use a smaller value
around known resonant frequencies and a larger value above the rolloff frequency. The
vector must be the same length as the vector you provide for Frequencies.
The amplitudes must be:
Frequency Response Estimator