Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes

Dimitri Goutaudier (1, 2, 3) , Didier Gendre (4) , Véronique Kehr-Candille (1) , Roger Ohayon (3)

1 DMAS, ONERA, Université Paris Saclay (COmUE) [Châtillon]
2 AIRBUS Operations Ltd.
3 LMSSC - Laboratoire de Mécanique des Structures et des Systèmes Couplés
4 Airbus Operation S.A.S.

This study presents a novel strategy for identifying an impact event on a structure from vibration measurements. Compared to triangulation techniques that require at least three sensors on a plate-like structure, only one sensor is used in this work for localizing the impact point. The proposed approach consists in extracting specific modal ponderations as a signature of impact location. The force reconstruction problem is simultaneously addressed by fitting a parametric law. The proposed procedure captures the main load history parameters such as the impact time, its duration and its intensity. An impact test campaign is performed on a metallic plate, equipped with one accelerometer only, to confirm the validity of the proposed single-sensor approach. The methodology is efficient for accurately localizing impacts that are applied anywhere on the plate and for quickly estimating the main load history parameters.

Mots clés: STRUCTURAL HEALTH MONITORING; IMPACT IDENTIFICATION; INVERSE PROBLEM; VIBRATION ANALYSIS

Mots clés: RÉSEAU DE CAPTEURS; ANALYSE VIBRATOIRE; IDENTIFICATION D'IMPACT; PROBLEME INVERSE; STRUCTURAL HEALTH MONITORING

Domaines: Génie mécanique [physics.class-ph]; Mécanique des structures [physics.class-ph]; Vibrations [physics.class-ph]

Dimitri Goutaudier, Didier Gendre, Véronique Kehr-Candille, Roger Ohayon. Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes. Mechanical Systems and Signal Processing, 2020, 138, pp.106534. ⟨10.1016/j.ymssp.2019.106534⟩. ⟨hal-02443465⟩