RESONANCE 2023

Session

10 juil. 2023 à 10:10

MFJA

Liste des contributions Ordre du jour

303. "JJCAB2#1 - Bearing degradation indicator using characteristic frequencies applied on non-stationary vibration signals"

Adrien MARSICK

10/07/2023 10:10

Rolling-element bearings are wear components in rotating machinery. Usually, their condition is monitored with signal-processing tools tailored for vibration-based surveillance. From cyclostationary theory, angle-time analysis, or sparsity-based approaches, numerous methods have been developed relying on the properties of incipient fault signals. The scalar indicators coming from these...

304. "JJCAB2#2 - Resynchronization of sequential measurements using the Maximally-Coherent Reference technique"

Muhammad Nabil Albezzawy

10/07/2023 10:15

Remote sensing of a physical field generated by a small number of sources is limited by the size of the available array of sensors and by the array density. These limitations may lead to asynchronously measuring the field by sequentially moving a small prototype array around its facets, however at the cost of losing the phase information between every array position. Resynchronization using...

305. "JJCAB2#3 - Conception d'indicateurs optimaux pour la détection précoce de défauts à l'aide d'un test de rapport de vraisemblance généralisé"

Kayacan Kestel

10/07/2023 10:20

Cette étude propose une méthodologie de construction d'indicateurs d’état de santé pour la surveillance vibratoire des machines tournantes en vue d'une détection précoce des défaillances. Ces indicateurs sont optimaux pour maximiser la probabilité de détection compte tenu d'un taux constant de fausses alarmes. Deux fonctions de densité de probabilité modélisant les états sain et défectueux des...

306. "JJCAB2#4 - Stochastic assessment of electric powertrain whining noise under early-stage design uncertainties"

Vinay PRAKASH

10/07/2023 10:25

Despite the advantage of being quieter than traditional internal combustion engine vehicles, electric vehicles are often distinguished by high-frequency tonal components, which can be perceived as unpleasant to the occupants. To ensure optimal acoustic comfort in electric vehicles, it is important to analyze the NVH behavior of e-powertrains during the early stages of the design process which...

307. "JJCAB2#5 - Surfaces et interfaces métaporoélastique pour la mitigation conjointe des énergies acoustiques et élastiques"

Mathieu Maréchal

10/07/2023 10:30

Les matériaux poreux sont utilisés depuis longtemps pour leur efficacité en absorption acoustique. Pourtant, dans leurs usages il existe des contraintes d’épaisseur qui limitent leur performance d’absorption en basses fréquences à cause de leurs mécanismes de pertes. Le développement de surfaces métaporeuses est donc un enjeu pour la réduction de ces matériaux absorbants, différentes...

308. "JJCAB2#6 - Modeling and optimization of acoustic metamaterials for cabin noise treatment"

Anas Lachheb

10/07/2023 10:35

The objective of our research is to develop an acoustic fairing for UAVs and other VTOL aircraft by using an acoustic metamaterials developed at Capgemini, which have been tested for noise insulation in new workspaces. These metamaterials will be used to create specific liners for the fairings and designed with a porous matrix that is printed using the Fused Deposition Modeling (FDM) method....