Structure Preserving Moment Matching for Port-Hamiltonian Systems: Arnoldi and Lanczos

Polyuga, R. V. & Schaft, A. V. D., Jun-2011, In : IEEE Transactions on Automatic Control. 56, 6, p. 1458-1462 5 p.

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Structure preserving model reduction of single-input single-output port-Hamiltonian systems is considered by employing the rational Krylov methods. The rational Arnoldi method is shown to preserve (for the reduced order model) not only a specific number of the moments at an arbitrary point in the complex plane but also the port-Hamiltonian structure. Furthermore, it is shown how the rational Lanczos method applied to a subclass of port-Hamiltonian systems, characterized by an algebraic condition, preserves the port-Hamiltonian structure. In fact, for the same subclass of port-Hamiltonian systems the rational Arnoldi method and the rational Lanczos method turn out to be equivalent in the sense of producing reduced order port-Hamiltonian models with the same transfer function.
Original languageEnglish
Pages (from-to)1458-1462
Number of pages5
JournalIEEE Transactions on Automatic Control
Issue number6
Publication statusPublished - Jun-2011


  • Model order reduction, port-Hamiltonian systems, rational Krylov methods, structure preservation, KRYLOV SUBSPACES, ORDER REDUCTION, PASSIVITY

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