Estimating the H-infinity gain of an active vibration isolation system using local rational models

E. Geerardyn, T.A.E. Oomen, J. Schoukens

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)

Abstract

Accurate uncertainty modeling is crucial in robust vibration controller design. A novel uncertainty modeling technique that enhances the estimated H∞ norm of the model error based on the frequency response is developed in this paper. The major innovation is the use of the local rational method (LRM), a local parametric modeling method, to address the inter-grid error. Unlike classical frequency response function (FRF)-based methods that typically underestimate the H∞ norm, the proposed technique allows to capture sharp resonance phenomena without the need for a user-intensive and time-consuming model selection step. The performance of the method is illustrated on a simulation example and on measurements of an industrial active vibration isolation system (AVIS). It is shown that in a short measurement time, a reliable estimate of the H∞ gain can be attained. On the measurement data, a 7.5 dB improvement of the H∞ norm is observed and validated.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Noise and Vibration Analysis, 15-17 September 2014, Leuven, Belgium
Pages161-172
Number of pages11
Publication statusPublished - 2014
Event26th International Conference on Noise and Vibration Engineering (ISMA 2014) - Leuven, Belgium
Duration: 15 Sep 201417 Sep 2014
Conference number: 26

Conference

Conference26th International Conference on Noise and Vibration Engineering (ISMA 2014)
Abbreviated titleISMA 2014
CountryBelgium
CityLeuven
Period15/09/1417/09/14

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