Control-based continuation of nonlinear structures using adaptive filtering
Author(s)
Abeloos, Gaëtan
Renson, Ludovic
Collette, Christophe
Kerschen, Gaetan
Type
Conference Paper
Abstract
Control-Based Continuation uses feedback control to follow stable and unstable branches of periodic orbits of a nonlinear system without the need for advanced post-processing of experimental data. CBC relies on an iterative scheme to modify the harmonic content of the control reference and obtain a non-invasive control signal. This scheme currently requires to wait for the experiment to settle down to steady-state and hence runs offline (i.e. at a much lower frequency than the feedback controller). This paper proposes to replace this conventional iterative scheme by adaptive filters. Adaptive filters can directly synthesize either the excitation or the control reference adequately and can operate online (i.e. at the same frequency as the feedback controller). This novel approach is found to significantly accelerate convergence to non-invasive steady-state responses to the extend that the structure response can be characterized in a nearly-continuous amplitude sweep. Furthermore, the stability of the controller does not appear to be affected.
Date Issued
2021
Date Acceptance
2020-09-01
Citation
2021, pp.109-112
ISBN
9783030476250
ISSN
2191-5644
Publisher
Springer International Publishing
Start Page
109
End Page
112
Copyright Statement
© The Society for Experimental Mechanics, Inc 2021. The final publication is available at Springer via https://doi.org/10.1007/978-3-030-47626-7_17
Sponsor
Royal Academy of Engineering
Royal Academy Of Engineering
Identifier
https://link.springer.com/chapter/10.1007%2F978-3-030-47626-7_17
Grant Number
RF1516/15/11
RF1516/15/11
Source
38th IMAC, A Conference and Exposition on Structural Dynamics
Publication Status
Published online
Coverage Spatial
Online
Date Publish Online
2020-09-13