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SUPPORT SITE |
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Path: Common/Control
% Compute the frequency response of the system given a, b, c and d.
.
x = ax + bu
y = cx + du
for the input vector iu, and output vector iy. If no output arguments
are given it will automatically display Bode plots for all channels.
If only 1 output is requested, the complex values will be output.
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Form:
[mag, phase, w, io] = FResp( a, b, c, d, iu, iy, w, uPhase, pType )
[mag, phase, w, io] = FResp( num, den, w, uPhase, pType )
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Inputs
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a Plant matrix
b Input matrix
c Measurement matrix
d Input feedthrough matrix
iu Inputs ( = 0, or leave out for all)
iy Outputs ( = 0, or leave out for all)
w (1,:) Frequency vector
uPhase (1,:) Unwrap phase = 'wrap' to wrap it within 180 deg
pType (1,:) 'bode' or 'nichols'
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Outputs
-------
mag Magnitude vector
phase Phase angle vector (deg)
w (1,:) Frequencies computed
io Input/output vector per plot [input,output;...]
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References: Laub, A., "Efficient Multivariable Frequency Response
Computations," IEEE Transactions on Automatic Control,
Vol. AC-26, No. 2, April 1981, pp. 407-408.
Maciejowski, J. M., Multivariable Feedback Design,
Addison-Wesley, Reading, MA, 1989, pp. 368-370.
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Common: Control/GND Common: Control/GSS Common: Control/SS2ND Common: Control/ZFresp Common: Graphics/Plot2D Common: Graphics/TextS
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