TY - INPR A1 - Mehrmann, Volker A1 - Van Dooren, Paul T1 - Optimal robustness of port-Hamiltonian systems N2 - We construct optimally robust port-Hamiltonian realizations of a given rational transfer function that represents a passive system. We show that the realization with a maximal passivity radius is a normalized port-Hamiltonian one. Its computation is linked to a particular solution of a linear matrix inequality that defines passivity of the transfer function, and we provide an algorithm to construct this optimal solution. We also consider the problem of finding the nearest passive system to a given non-passive one and provide a simple but suboptimal solution. Y1 - 2019 UR - https://opus4.kobv.de/opus4-trr154/frontdoor/index/index/docId/406 ER -