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Reduction of large circuit models via low rank approximate gramians

100%

Li J.-R., White J.

International Journal of Applied Mathematics and Computer Science

2001

tom 11

nr 5

1151-1171

We describe a model reduction algorithm which is well-suited for the reduction of large linear interconnect models. It is an orthogonal projection method which takes as the projection space the sum of the approximate dominant controllable subspace and the approximate dominant observable subspace. These approximate dominant subspaces are obtained using the Cholesky Factor ADI (CF-ADI) algorithm. We describe an improvement upon the existing implementation of CF-ADI which can result in significant savings in computational cost. We show that the new model reduction method matches moments at the negative of the CF-ADI parameters, and that it can be easily adapted to allow for DC matching, as well as for passivity preservation for multi-port RLC circuit models which come from modified nodal analysis.

Reproducing kernels and Riccati equations

86%

Dym H.

International Journal of Applied Mathematics and Computer Science

2001

tom 11

nr 1

35-53

The purpose of this paper is to exhibit a connection between the Hermitian solutions of matrix Riccati equations and a class of finite dimensional reproducing kernel Krein spaces. This connection is then exploited to obtain minimal factorizations of rational matrix valued functions that are J-unitary on the imaginary axis in a natural way.

Ograniczanie wyników

2 International Journal of Applied Mathematics and Computer Science

1 Dym H.

1 Li J.-R.

1 White J.

2 2001

Wyniki wyszukiwania

Reduction of large circuit models via low rank approximate gramians

Reproducing kernels and Riccati equations