Real-time dynamic substructuring in a coupled oscillator-pendulum system

Y Kyrychko, KB Blyuss, A Gonzalez-Buelga, SJ Hogan, DJ Wagg

Research output: Contribution to journalArticle (Academic Journal)peer-review

104 Citations (Scopus)


Real-time dynamic substructuring is a powerful testing method, which brings together analytical, numerical and experimental tools for the study of complex structures. It consists of replacing one part of the structure with a. numerical model; which is connected to the remainder of the physical structure (the substructure) by a transfer system. In order to provide reliable results, this hybrid system must remain stable during the whole test. A primary mechanism for destabilization of these type of systems is the delays which are naturally present in the transfer system. In thus paper, we apply the dynamic substructuring technique to a nonlinear system consisting of a pendulum attached to a mechanical oscillator. The oscillator is modelled numerically and the transfer system is an actuator. The system dynamics is governed by two coupled second-order neutral delay differential equations. We carry out local and global stability analyses of the system and identify the delay dependent stability boundaries for this type of system. We then perform a series of hybrid experimental tests for a pendulum-oscillator system. The results give excellent qualitative and quantitative agreement when compared to the analytical stability results.
Translated title of the contributionReal-time dynamic substructuring in a coupled oscillator-pendulum system
Original languageEnglish
Pages (from-to)1271 - 1294
Number of pages24
JournalProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume462 (2068)
Publication statusPublished - Apr 2006

Bibliographical note

Publisher: The Royal Society


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