Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Model uncertainity measurement
Replies: 1   Last Post: Jun 21, 2011 8:56 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
mehmet tk

Posts: 23
Registered: 8/8/07
Re: Model uncertainity measurement
Posted: Jun 21, 2011 8:56 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

any help?

"Shelia kk" wrote in message <itq8vc$16c$1@newscl01ah.mathworks.com>...
>
> Hi All,
>
> I have two n-dimensional LTI models such as
>
> X1dot = A1*X1 + B1*U ;
>
> y1 = C1*X1 ;
>
> and
>
> X2dot = A2*X2 + B2*U ;
>
> y2 = C2*X2 ;
>
> X2 is an approximation of X1 and therefore there is an uncertainty between the responses of the two models. such that
>
> 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
>
>




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.