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Parametric variation of a coupled pendulum‐oscillator system using real‐time dynamic substructuring
Author(s) -
GonzalezBuelga A.,
Wagg D. J.,
Neild S. A.
Publication year - 2007
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.189
Subject(s) - substructure , nonlinear system , parametric statistics , control theory (sociology) , bifurcation , pendulum , stability (learning theory) , double pendulum , system dynamics , range (aeronautics) , noise (video) , mathematics , computer science , engineering , inverted pendulum , physics , structural engineering , mechanical engineering , statistics , control (management) , quantum mechanics , artificial intelligence , machine learning , aerospace engineering , image (mathematics)
In this paper, we present results from real‐time dynamic substructuring tests used to model the dynamics of a coupled pendulum–oscillator system. The substructuring technique is particularly suitable for systems where the nonlinear and linear parts of the system can be separated. The nonlinear part is built full size and tested physically (the substructure) while the linear part is simulated numerically. Then, in order to replicate the dynamics of the complete system the substructure and the numerical model must be coupled in real time. In this study, we demonstrate how real‐time dynamic substructure testing can be used to model systems with strongly nonlinear behaviour using parametric variation. We show that the substructuring results give good qualitative and quantitative agreement with purely numerical simulations of the complete system for a range of parameters values. This includes single parameter bifurcation diagrams, some of which cannot be obtained from a full physical experiment. We also briefly discuss the effects of delay and noise on the stability of the substructured system, and how these effects can be mitigated. Copyright © 2006 John Wiley & Sons, Ltd.