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Identification of aeroelastic parameters for helicopter tail rotor limit cycle oscillation monitoring

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1177/1045389X15606996
AuteurRechercher : 1; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Aérospatiale
FormatTexte, Article
Sujetstructural health monitoring; sensor; embedded intelligence
Résumé
The aeroelastic parameters of helicopter tail rotors are required in the monitoring and evaluation of rotor aeroservoelastic instability incidents such as limit cycle oscillations (LCO). However, in-situ measurement of these parameters on helicopters is generally difficult due to the need to transfer vibration data across a rotating interface. This paper presents a novel center frequency scaling factor relationship of the aeroelastic parameters between the rotating and stationary frames. Together with the stochastic parameter identification technique, this methodology enables real-time estimation and tracking of the critical aeroelastic parameters in the rotating frame during LCO events based on vibration information measured exclusively in the stationary frame. The methodology has been validated using flight vibration data measured from both the rotating and stationary frames of a helicopter tail rotor system during an LCO event. Moreover, this methodology has been applied to the analysis of vibration data measured from the teeter tail rotor system on the Canadian CH-149 Cormorant helicopters to derive the critical aeroelastic parameters during several LCO events.
Date de publication
Dans
  • Journal of Intelligent Material Systems and Structures (septembre 2015).
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21276895
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Identificateur de l’enregistrement4a7f2a3c-8d91-4b91-8246-ee568f72835e
Enregistrement créé2015-11-04
Enregistrement modifié2020-04-22
Date de modification :