It is part of the Signal Processing Toolbox. tfestimate would be a better choice to estimate the transfer based on the measurement data (again remember to pre-process the data the same way as I have just done here). Bode diagram design is an interactive graphical method of modifying a compensator to achieve a specific open-loop response (loop shaping). The DC level of the transfer function is correct, but the poor FFT technique yields too much noise at (relatively) higher frequencies. In the editor, you can adjust the open-loop bandwidth and design to gain and phase margin specifications. To interactively shape the open-loop response using Control System Designer, use the Bode Editor. I suggest you do the same thing when taking the FFT: L = length(ym(t>=10)) Bode diagram design is an interactive graphical method of modifying a compensator to achieve a specific open-loop response (loop shaping). This gives the following plot (in Octave): You'll notice that I have discarded the time values before 10 and shifted the response values down by about 2.2. En la presente practica se busca analizar la respuesta en frecuencia de distintas funciones utilizando el software MATLAB como herramienta para el estudio de los diagramas de bode de dichas funciones, para esto es necesario utilizar la funcin 'Bode' de MATLAB. Num= %// Numerator of z-transform of impulse response of systemÄen= %// Denominator of z-transform of impulse response of system I looked at your data and compared it with the theoretical transfer function in the time-domain and it isn't a bad fit if you ignore some of the data: t = 1:length(u) How to Make a Bode Plot Using MATLAB ultimatemath 856 subscribers Subscribe 742 Share 226K views 10 years ago This video explains how to make a Bode plot using MATLAB.
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