The best linear approximation of mimo systems: simplified nonlinearity assessment using a toolbox

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

The aim of the paper is to introduce a case study for nonparametric nonlinear assessment using a toolbox illustrated on a small, battery-operated road vehicle. The toolbox (Simplified Analysis for Multiple Input Systems, SAMI) is based on the Best Linear Approximation framework of multiple input, multiple output systems which provides a user-friendly interpretation of the measurement data by extracting the user relevant information by splitting up the classical coherence function of the FRF measurements into noise, nonlinearity and transient parts. By the use of the proposed toolbox, a less experienced user will be able to 1) nonparametrically assess the system under test, 2) to tell whether the underlying system is linear or not, and 3) to tell how much is the gain by the use of an advanced nonlinear framework. The proposed toolbox addresses the questions related to the semi-automatic processing of MIMO measurements with respect to the whole process from the design of experiment to the nonparametric analysis of the frequency response functions. The toolbox has been tested with simulations and real-life industrial measurements.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Noise and Vibration Engineering (ISMA)
EditorsW. Desmet, B. Pluymers, D. Moens, S. Vandemaele
PublisherKU Leuven
Pages2239-2252
Number of pages14
ISBN (Electronic)9789082893113
ISBN (Print)9789082893113
Publication statusPublished - 7 Sep 2020
EventInternational Conference on Noise and Vibration Engineering 2020 - Leuven, Belgium
Duration: 7 Sep 20209 Sep 2020

Publication series

NameProceedings of ISMA 2020 - International Conference on Noise and Vibration Engineering and USD 2020 - International Conference on Uncertainty in Structural Dynamics

Conference

ConferenceInternational Conference on Noise and Vibration Engineering 2020
Abbreviated titleISMA2020
CountryBelgium
CityLeuven
Period7/09/209/09/20

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