RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Survivability of helicopter with individual blade primary control failure

Auteur(s) / Author(s)

GANGULI R. (1) ; JEHNERT B. (2) ; WOLFRAM J. (2) ; VOERSMANN P. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Aerospace Engineering Indian Institute of Science, Bangalore, INDE
(2) Institut für Luft und Raumfahrtsysteme Technische Universität Braunschweig, ALLEMAGNE

Résumé / Abstract

The effect of actuator damage on a helicopter rotor with an IBC based primary control system is studied. Such a system eliminates the swashplate and can be accomplished by trailing-edge flaps, active twist or full authority IBC, especially with smart material actuators. Damage to the collective, longitudinal and lateral cyclic are simulated for one blade, both individually and in combinations ranging from partial damage to complete failure. Numerical results are obtained using a dissimilar blade aeroelastic analysis based on finite elements in space and time for hover and forward speed conditions. It is found that the helicopter can be trimmed for all cases with all three controls having failed on the blade with actuator damage thereby showing that the IBC actuated rotor can survive an actuator failure and can be reconfigured by the pilot using the controls on the other blades. However, in case the collective fails and the longitudinal cyclic is present, there are problems in achieving trim at high damage levels at high forward speeds. Physical explanations of this phenomenon are given. The response (especially flap) for the damaged rotor blades can become high and 1/rev and 2/rev are transmitted by the reconfigured rotor to the hub. Results show that IBC based primary controls provide redundancy which can improve the survivability of a helicopter in case of actuator failure in one blade.

Revue / Journal Title

Aeronautical Journal    ISSN  0001-9240   CODEN AENJAK 

Source / Source

2007, vol. 111, no1124, pp. 645-657 [13 page(s) (article)] (41 ref.)

Langue / Language

Anglais

Editeur / Publisher

Royal Aeronautical Society, London, ROYAUME-UNI  (1968) (Revue)

Mots-clés anglais / English Keywords

Hub

;

Space time

;

Finite element method

;

High speed

;

Helicopter

;

Aeroelasticity

;

Smart materials

;

Flap

;

Deflector

;

Trailing edge

;

Damaging

;

Actuator

;

Helicopter rotor

;

Apparatus failure

;

Hovering

;

Fault tolerant system

;

Mots-clés français / French Keywords

Moyeu

;

Espace temps

;

Méthode élément fini

;

Grande vitesse

;

Hélicoptère

;

Aéroélasticité

;

Matériau intelligent

;

Volet

;

Déflecteur

;

Bord fuite

;

Endommagement

;

Actionneur

;

Rotor hélicoptère

;

Défaillance appareil

;

Vol stationnaire

;

Système tolérant les pannes

;

Mots-clés espagnols / Spanish Keywords

Cubo

;

Espacio tiempo

;

Método elemento finito

;

Gran velocidad

;

Helicóptero

;

Aeroelasticidad

;

Flap

;

Deflector

;

Borde salida

;

Deterioración

;

Accionador

;

Rotor helicóptero

;

Insuficiencia aparato

;

Vuelo estacionario

;

Sistema tolerando faltas

;

Localisation / Location

INIST-CNRS, Cote INIST : 985, 35400017349920.0040

Nº notice refdoc (ud4) : 19222469



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas