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Complex Coefficient Filter bode plot
You could try this as a workaround a = tf(1,[1,i]) % Complex tf wp = logspace(-2,2,100); % Freq vector hpos = freqresp(a,...

alrededor de 14 años hace | 0

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multiple bode plots on same graph
You can create an frd object from your data and then plot it like any other LTI object. [ResponseData,Frequencies]=freqresp...

alrededor de 14 años hace | 1

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Bode diagram to Nichols curve
Hi Simon, You can create an FRD (frequency response data object) using the mag and phase information >> m = [1;2;3]; % m...

alrededor de 14 años hace | 0

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StepInfo Outputting NaN for my Transfer Function
Hi Omar, The system you specified has an integrator and is therefore unstable. This is the reason why NaN's are being returne...

alrededor de 14 años hace | 1

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Unobtainable bode plot ?
You might want to try this (j*w_n)^2 = -w_n^2 then you can rewrite the w_n^2 term.

alrededor de 14 años hace | 0

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Margin gives wrong 0db point. (the second crossing of the 0db line not the first)
Hi Max, The MARGIN command computes the mimimum phase margin, which in the code example you provided does occur for the third...

alrededor de 14 años hace | 0

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SISO Design tool in discrete time
Hi Adeyemi, In the SISO Design Tool there is an check box option on the PID tuning panel for "Design with first order derivat...

más de 14 años hace | 0

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kalman function from Control System Toolbox™ missing Nu value
Hi Paulo, I ran the code you posted in MATLAB version R2008b and it ran to completion fine. The variable Nu is initialized on...

más de 14 años hace | 1

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sisotool graphical tuning problem with frd discrete model
Hi Brag, This is a bug in the SISO Design Tool that has been fixed for the upcoming release R2011b. One way to work around th...

más de 14 años hace | 0