Transfer function from ARX-model
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Im trying to get a transfer function from an arx model. I have tried to follow an MATLAB-example that i found on the homepage. I think my ARX model is pretty good but i dont really know how to get a good op-point for the linearization
Im using the example file twotankdata with 1 input and 1 output.
Help would be greatly appreciated!
This is how far im currently at:
load twotankdata.mat
ze = iddata(y, u, 0.2);
m3 = nlarx(ze,[2 2 3],wavenet('num',8));% na=nb=2 and nk=3
figure(2);step(m3,60)
stepinput = iddata([],[zeros(35,1);ones(1500,1)],m3.Ts);
%Dont know what happends here!
x0 = findop(m3,'steady',1,NaN);
sys2 = linearize(m3,1,x0)
figure(4);step(sys2,60)
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Risposte (1)
Rajiv Singh
il 11 Apr 2013
Modificato: John Kelly
il 26 Feb 2015
help?
2 Commenti
Arkadiy Turevskiy
il 11 Apr 2013
[X,U] = findop(SYS,'snapshot',T,UIN,X0) computes the operating point at a simulation snapshot of time T using the specified input and initial state values
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