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Phase resonance method for nonlinear mechanical structures with phase locked loop control

Tang, Martin and Stéphan, Cyrille and Böswald, Marc (2020) Phase resonance method for nonlinear mechanical structures with phase locked loop control. In: Proceedings of ISMA 2020 International Conference on Noise and Vibration Engineering, pp. 1805-1818. ISMA 2020 - International Conference on Noise and Vibration Engineering, 07.-09. Sep. 2020, Leuven, Belgien (Online-Konferenz). ISBN 9789082893113.

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Abstract

The identification of nonlinear mechanical structures is still a field of active research. Several researchers applied the concept of nonlinear normal modes for numerical nonlinear modal analysis of mechanical structures. This method can also be used for experimental identification of mechanical structures; however, successful demonstration on highly nonlinear structures with multiple degrees of freedom for input and output are not state of the art. Phase locked loop control is one method for identifying nonlinear normal modes, but the theoretical foundation of this control is limited to single degree of freedom systems and phase estimation fails if the response of higher harmonics due to nonlinear behavior is significant. Hence, an input-output blending with a modal approach is used in order to extend the single-input, single-output into a multiple-input, multiple-output controller. Furthermore, phase estimation is improved with an adaptive least-squares sine fit. The proposed method has been implemented and tested on a laboratory structure, where a mode with highly nonlinear behavior has been extracted.

Item URL in elib:https://elib.dlr.de/136096/
Document Type:Conference or Workshop Item (Speech)
Title:Phase resonance method for nonlinear mechanical structures with phase locked loop control
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tang, MartinMartin.Tang (at) dlr.deUNSPECIFIED
Stéphan, CyrilleONERAUNSPECIFIED
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Date:November 2020
Journal or Publication Title:Proceedings of ISMA 2020 International Conference on Noise and Vibration Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1805-1818
ISBN:9789082893113
Status:Published
Keywords:nonlinear system identification, experimental modal analysis, phase resonance method, real time control
Event Title:ISMA 2020 - International Conference on Noise and Vibration Engineering
Event Location:Leuven, Belgien (Online-Konferenz)
Event Type:international Conference
Event Dates:07.-09. Sep. 2020
Organizer:KU Leuven - Department of Mechanical Engineering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Tang, Martin
Deposited On:24 Nov 2020 18:10
Last Modified:24 Nov 2020 18:17

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