Effect of time delay on System Identification
2016-08-23
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The BJ(Box-Jenkins) method is used to identify a discrete system as G(z)=0.0181z-11 /(1-1.8006z-1 +0.8187z-2 ). To identify this system the model is considered as Gm(z)=f(z)/(a1+a2z-1 +a3z-2)where a,b,c are assumed to be unknown and f(z) is as follows
f(z)=b1+b2z-1+b3z-2 +...bnk z-nk
where b1-bnk are also unknown and also nk is unknown. the system is identified for different nk 's and the results are compared.
A unit feed back with a simple PI controller is used achieve a stable system and some input-out put samples are available for identification.
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