Experimental Nonlinear Modal Analysis of an F-16 Aircraft using Phase-locked Loop Control

[en] This study leverages phase-locked loop (PLL) control and adaptive filtering for the experimental identification of the nonlinear modal parameters of an F-16 aircraft. Specifically, PLL effectively tracks the backbones of three aircraft modes, enabling the extraction of resonance frequencies, mode shapes, and damping ratios, all of which vary with vibration amplitude. Additionally, the nonlinear frequency responses of 3:1 superharmonic resonances are identified. The results reveal that the F-16 aircraft exhibits softening effects due to joint friction in the wing-to-payload connections, as well as clearance-induced nonlinearity. The onset of contact is further illustrated through time-harmonic analysis of modal deflection shapes.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Zhou, Tong ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Raze, Ghislain ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Kosova, Giancarlo ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Siemens Digital Industries Software

Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Language :

English

Title :

Experimental Nonlinear Modal Analysis of an F-16 Aircraft using Phase-locked Loop Control

Publication date :

2025

Journal title :

Journal of Aircraft

ISSN :

0021-8669

eISSN :

1533-3868

Publisher :

American Institute of Aeronautics and Astronautics, United States - Virginia

Peer reviewed :

Peer Reviewed verified by ORBi

Funding text :

Tong Zhou gratefully acknowledges the financial support provided by the postdoctoral fellowship at University of Liege (IPD-STEMA 2021, R.DIVE.0981-J-F-L). Ghislain Raze is a Postdoctoral Researcher of the Fonds de la Recherche Scientifique - FNRS which is gratefully acknowledged.

Available on ORBi :

since 22 April 2025

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