What is the alternative for 'getPeakGain' command for FOTF (Fractional Order Transfer Function)?

What is the alternative for 'getPeakGain' command for FOTF (Fractional Order Transfer Function)? As getPeakGain' command only works for integer order Transfer function.

error message:

Undefined function 'getPeakGain' for input arguments of type 'fotf'.

[Paul]

Is the definition of frequency response for an FOTF the same as what it is for an IOTF?

Answer 1

[SANKALP DEV]

Hey Dipjyoti,

I understand you want to calculate peak gain for FTOF (Fractional Order Transfer Function).

For solving FTOF efficiently, you can download FOMCON toolbox from MATLAB addons. (MATLAB>Home>addons).After installing FOMCON, and setting the correct path, you can directly use ‘getPeakGain’ to calculate the Peak Gain.

Please consider the following code.

% Define the fractional order transfer function
s = fotf('s');
sys = tf(90,[1.2,1.5,90]); % sample FTOF
gpeak = getPeakGain(sys);
disp(gpeak)

To know more about FOMCON, please refer to following MATLAB documentation.

https://www.mathworks.com/matlabcentral/fileexchange/66323-fomcon-toolbox-for-matlab?s_tid=srchtitle_support_results_1_FOMCON

Hope this helps.