So I have an experimental data; A is a chirp signal (sweep sine wave) and B is the response of the system. I identify the system as follows in MATLAB:
figure Ts= 1e-4; Fs = 1/Ts; [T,f]=tfestimate(A,B,,,,Fs); semilogx(f,20*log10(abs(T))); grid
This is with Ts = 1e-2
This is with Ts = 1e-4
Can anyone help me figure out what the correct value of Ts is, so my reported eigenfrequencies are correct?