Inhalt des Dokuments
Preprint 10-2019
Structure-preserving Interpolatory Model Reduction for Port-Hamiltonian Differential-Algebraic Systems
Author(s) :
Christopher A. Beattie
,
Serkan Gugercin
,
Volker Mehrmann
Preprint series of the Institute of Mathematics, Technische Universität Berlin
Preprint 10-2019
MSC 2000
- 34H05 Control problems
-
65L70 Error bounds
Abstract :
We examine interpolatory model reduction methods that are well-suited for treating large scale port-Hamiltonian differential-algebraic systems in a way that is able to preserve and take advantage of the underlying structural features of the system. We introduce approaches that incorporate regularization together with prudent selection of interpolation data. We focus on linear time-invariant systems and present a systematic treatment of a variety of model classes that include combinations of index-$1$ and index-$2$ systems, describing in particular how constraints may be represented in the transfer function and then preserved with interpolatory methods. We propose an algorithm to generate effective interpolation data and illustrate its effectiveness on a %two
numerical example.
Keywords :
port-Hamiltonian system, positive-real system, model reduction, differential-agebraic system