Identification of dynamic models in complex networks with prediction error methods : basic methods for consistent module estimates

P.M.J. Hof, Van den, A.G. Dankers, P.S.C. Heuberger, X. Bombois

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104 Citations (Scopus)
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Abstract

The problem of identifying dynamical models on the basis of measurement data is usually considered in a classical open-loop or closed-loop setting. In this paper, this problem is generalized to dynamical systems that operate in a complex interconnection structure and the objective is to consistently identify the dynamics of a particular module in the network. For a known interconnection structure it is shown that the classical prediction error methods for closed-loop identification can be generalized to provide consistent model estimates, under specified experimental circumstances. Two classes of methods considered in this paper are the direct method and the joint-IO method that rely on consistent noise models, and indirect methods that rely on external excitation signals like two-stage and IV methods. Graph theoretical tools are presented to verify the topological conditions under which the several methods lead to consistent module estimates. Keywords: System identification; Closed-loop identification; Graph theory; Dynamic networks; Identifiability; Linear systems
Original languageEnglish
Pages (from-to)2994-3006
JournalAutomatica
Volume49
Issue number10
DOIs
Publication statusPublished - 2013

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