MATLAB: In the control systems toolbox, what is the difference between transfer function, state-space, zero-pole-gain, and frequency-response model

controlsystemtransfer function

I don't have a strong background in control systems. I am just trying to plot the magnitude of the ratio of an output voltage to the input voltage

Best Answer

ss(num,dem)

   ans=num(s)/dem(s)

zpk([zeros],[poles],[gain])

ans=k*zeros(s)/poles(s)

Related Solutions

MATLAB: If i have poles and zeros of a transfer function, how to obtain this transfer function ??

transfer_function = tf( zpk(ListOfZeros, ListOfPoles, ListOfGains))

MATLAB: Using zero-pole-gain Butterworth filter

The zero-pole-gain is a good start. To filter your data, I would convert it to second order section implementation for stability, then use that to filter your data. Use the filtfilt function to do the actual filtering, since it has a maximally flat phase response and so does not produce any phase distortion in your filtered signal.

It is always good to be certain your filter is doing what you want by using the freqz function first.

Try this:

[z,p,k] = butter(n,Wn,ftype);
[sos, g] = zp2sos(z, p, k);
figure(1)
freqz(sos, 2^16)
dataOut = filtfilt(sos, g, dataIn);

That should work.

Best Answer

Related Solutions

MATLAB: If i have poles and zeros of a transfer function, how to obtain this transfer function ??

MATLAB: Using zero-pole-gain Butterworth filter

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