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Kernel-based models for system analysis

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arxiv 2110.11735 v1 pith:FFTDCUL4 submitted 2021-10-22 math.OC math.DS

Kernel-based models for system analysis

classification math.OC math.DS
keywords systemanalysisframeworkinput-outputfittingkernel-basedmodelingmodels
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This paper introduces a computational framework to identify nonlinear input-output operators that fit a set of system trajectories while satisfying incremental integral quadratic constraints. The data fitting algorithm is thus regularized by suitable input-output properties required for system analysis and control design. This biased identification problem is shown to admit the tractable solution of a regularized least squares problem when formulated in a suitable reproducing kernel Hilbert space. The kernel-based framework is a departure from the prevailing state-space framework. It is motivated by fundamental limitations of nonlinear state-space models at combining the fitting requirements of data-based modeling with the input-output requirements of system analysis and physical modeling.

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  1. Kernel-based identification of nonlinear port-Hamiltonian systems

    math.OC 2026-06 unverdicted novelty 6.0

    A kernel-based framework with a representer theorem reduces identification of nonlinear port-Hamiltonian systems to a finite-dimensional non-convex problem solved by a convergent algorithm.