LTI data extraction
Hello, I have a continuous simulink model with mulitple transfer functions that I put into the LTI toolkit, but I would like to extract the bode plot (Magnitude and phase) into variable names so I can compare it to a discrete version I wrote. Is there a way to extract the data? or should I not use LTI and go about it differently? Thanks here is the LTI code I used: mdl = 'MODEL_Continuous'; % set to file name of simulink model io = getlinio(mdl) % get i/o signals of mdl op = operspec(mdl) op = findop(mdl,op) % calculate model operating point lin = linearize(mdl,op,io) % compute state space model of lin sys ltiview(lin)
John Williams answered .
2025-11-20
[mag,phase,freqs] = bode(lin)
Also, if you are comparing two systems, you might want to actually specify the frequencies of interest
%Create frequency vector with 100 points between 10^-1 .. 10^2 freqs = logspace(-1,2,100); %Get bode output at those frequencies [mag,phase] = bode(lin,freqs)