[SI-LIST] Passivity Enforcement Matlab Code
- From: Raymond Anderson <Raymond.Anderson@xxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 01 Jun 2004 08:34:56 -0700
Any of the list members who are interested in passivity enforcement as
it pertains to modeling may be interested in the Matlab code just
released by Dr. Bjorn Gustavsen of SINTEF Energy Research in Trondheim,
Norway.
He writes:
> Hi Raymond,
>
> You may want to announce on your list-server that a package for
> passivity enforcement (QPpassive.zip) has now been added to the site
> http://www.energy.sintef.no/produkt/VECTFIT/home.asp
>
> Best regards,
> Bjorn
This code utilizes quadratic programming techniques.
From Bjorn's web page:
------------------------------------------------------------------------
This package contains a post-processing procedure for enforcing
passivity of a model given on pole-residue form. This is done by
introducing the passivity criterion as a constraint equation in the
least squares problem. The routine requires the user to provide
frequency samples for the least squares problem and the passivity
constraint. A large number of options is available.
Download: QPpassive.zip*
* <http://www.energy.sintef.no/produkt/VECTFIT/QPpassive.zip>
*File*
*Purpose*
QPpassive.pdf
User manual
passivity.pdf
Document describing the theory (IEEE paper)
QPpassive.m
Passivity enforcement routine
rot.m
Utility routine, rotates eigenvectors to minimize their imaginary part
interchange.m
Utility routine, interchanges eigenpairs to obtain eigenvalues as smooth
functions of frequency
ex1.m, ex2.m, ex3a.m, ex3b.m, ex4a.m, ex4b.m
Example cases described in QPpassive.pdf
ex1.mat, ex2.mat, ex3.mat, ex4.mat
Workspaces containing variables for examples (ex1.m,...)
Note: QPpassive.m uses the routine quadprog.m of the Matlab Optimization
Toolbox.
----------------------------------------------------------------------------------------------
-Ray Anderson
Sun Microsystems Inc.
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