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Re: Model uncertainity measurement
Posted:
Jun 21, 2011 8:56 PM
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any help?
"Shelia kk" wrote in message <itq8vc$16c$1@newscl01ah.mathworks.com>...
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> Hi All,
>
> I have two n-dimensional LTI models such as
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> X1dot = A1*X1 + B1*U ;
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> y1 = C1*X1 ;
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> and
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> X2dot = A2*X2 + B2*U ;
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> y2 = C2*X2 ;
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> X2 is an approximation of X1 and therefore there is an uncertainty between the responses of the two models. such that
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> X1dot = (A2+ Auncertainty)*X1 + (B2+Buncertainty)*U
>
> I want to measure the bounds of these uncertainities (Auncertainty) and (Buncertainty). How can I do that? Which function in Robust Control Toolbox help me to measure the uncertainties? norm(A1-A2) is not the solution. I think I should use frequency response methods to obtain Hinf norms but not quite sure. Thanks
>
>
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