Challenges in the Identification of Discrete Time Block Oriented Models for Continuous Time Nonlinear Systems**This work was supported in part by the Fund for Scientific Research (FWO-Vlaanderen), by the Flemish Government (Methusalem), the Belgian Government through the Inter university Poles of Attraction (IAP VII) Program, and by the ERC advanced grant SNLSID, under contract 320378

Autor:	Rishi Relan, M. Vaes, Joannes Schoukens, Alireza Fakhrizadeh Esfahani
Rok vydání:	2015
Předmět:	Class (computer programming) Identification (information) Nonlinear system Discrete time and continuous time Control and Systems Engineering Simple (abstract algebra) Control theory Structure (category theory) Applied mathematics Focus (optics) Block (data storage) Mathematics
Zdroj:	IFAC-PapersOnLine. 48:596-601
ISSN:	2405-8963
DOI:	10.1016/j.ifacol.2015.12.194
Popis:	Block oriented nonlinear models capture the dynamics of a nonlinear system with linear dynamic sub-systems (L), the nonlinear behavior is modeled using static nonlinear subblocks (N). In this paper we focus on three important theoretical and practical challenges that need to be addressed when the class of systems is generalized from the simple but very popular Wiener, Hammerstein, Hammerstein-Wiener or Wiener-Hammerstein systems to more complex nonlinear systems, including nonlinear feedback loops: 1) Dealing with complex blockoriented models: initial (structure revealing) tests; 2) Testing of candidate semi-physical blockoriented models; and 3) Approximating continuous time nonlinear systems by a discrete time recursive model. Experimental illustrations and verifications are shown.
Databáze:	OpenAIRE
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