Identification of Nonlinear Circuits as Port-Hamiltonian Systems

Judy Najnudel; Rémy Müller; Thomas Hélie; David Roze
DAFx-2021 - Vienna (virtual)
This paper addresses identification of nonlinear circuits for power-balanced virtual analog modeling and simulation. The proposed method combines a port-Hamiltonian system formulation with kernel-based methods to retrieve model laws from measurements. This combination allows for the estimated model to retain physical properties that are crucial for the accuracy of simulations, while representing a variety of nonlinear behaviors. As an illustration, the method is used to identify a nonlinear passive peaking EQ.