• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire d’Ingénierie des Systèmes Physiques Et Numériques (LISPEN)
  • View Item
  • Home
  • Laboratoire d’Ingénierie des Systèmes Physiques Et Numériques (LISPEN)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Instability Mechanism of Roll/Lateral Biodynamic Rotorcraft–Pilot Couplings

Article dans une revue avec comité de lecture
Author
MUSCARELLO, Vincenzo
137703 Dipartimento di Scienze e Tecnologie Aerospaziali [Milano] [DAER]
125443 Politecnico di Milano [Milan] [POLIMI]
MASARATI, Pierangelo
125443 Politecnico di Milano [Milan] [POLIMI]
137703 Dipartimento di Scienze e Tecnologie Aerospaziali [Milano] [DAER]
QUARANTA, Giuseppe
125443 Politecnico di Milano [Milan] [POLIMI]
137703 Dipartimento di Scienze e Tecnologie Aerospaziali [Milano] [DAER]
TOD, Georges
PAVEL, Marilena
62731 Faculty of Aerospace Engineering [Delft]
333368 Delft University of Technology [TU Delft]
ccGOMAND, Julien
303092 Arts et Métiers Paristech ENSAM Aix-en-Provence
543315 Laboratoire d’Ingénierie des Systèmes Physiques et Numériques [LISPEN]
ccMALBURET, François

URI
http://hdl.handle.net/10985/17395
DOI
10.4050/jahs.63.022004
Date
2018
Journal
Journal of the American Helicopter Society

Abstract

The paper investigates the basic mechanism of aeroservoelastic pilot-assisted oscillation about the roll axis due to the interaction with pilot's arm biomechanics. The motivation stems from the observation that a rotor imbalance may occur as a consequence of rotor cyclic lead–lag modes excitation. The work shows that the instability mechanism is analogous to air resonance, in which the pilot's involuntary action plays the role of the automatic flight control system. Using robust stability analysis, the paper shows how the pilot's biodynamics may involuntarily lead to a roll/lateral instability. The mechanism of instability proves that the pilot biodynamics is participating in the destabilization of the system by transferring energy, i.e., by producing forces that do work for the energetically conjugated displacement, directly into the flapping mode. This destabilizes the airframe roll motion, which, in turn, causes lead–lag motion imbalance. It is found that, depending on the value of the time delay involved in the lateral cyclic control, the body couples with rotor motion in a different way. In the presence of small or no time delays, body roll couples with the rotor through the lead–lag degrees of freedom. The increase of the time delay above a certain threshold modifies this coupling: The body no longer couples with the rotor through lead–lag but directly through flap motion.

Files in this item

Name:
LISPEN_JAHS_2018_GOMAND.pdf
Size:
2.197Mb
Format:
PDF
View/Open

Collections

  • Laboratoire d’Ingénierie des Systèmes Physiques Et Numériques (LISPEN)

Related items

Showing items related by title, author, creator and subject.

  • Understanding pilot biodynamical feedthrough coupling in helicopter adverse roll axis instability via lateral cyclic feedback control 
    Article dans une revue avec comité de lecture
    TOD, Georges; PAVEL, Marilena; BARRE, Pierre-Jean; ccGOMAND, Julien; ccMALBURET, François (Elsevier, 2016)
    The paper reassesses the mechanism of biodynamical feedthrough coupling to helicopter body motion in lateral-roll helicopter tasks. An analytical bio-aeroelastic pilot–vehicle model is first developed and tested for various ...
  • An upper limb musculoskeletal model using bond graphs for rotorcraft-pilot couplings analysis 
    Communication avec acte
    TOD, Georges; BARRE, Pierre-Jean; ccGOMAND, Julien; ccMALBURET, François (SIMBIO-M, 2014)
    Under certain flight conditions, a rotorcraft fuselage motions and vibrations might interact with its pilot voluntary and involuntary actions leading to potentially dangerous dynamic instabilities known as rotorcraft-pilot ...
  • Modeling Stiffness and Damping in Rotational Degrees of Freedom Using Multibond Graphs 
    Communication avec acte
    TOD, Georges; BARRE, Pierre-Jean; ccGOMAND, Julien; ccMALBURET, François (2013)
    A contribution is proposed for the modeling of mechanical systems using multibond graphs. When modeling a physical system, it may be needed to catch the dynamic behavior contribution of the joints between bodies of the ...
  • An Energetic Approach to Aeroelastic Rotorcraft-Pilot Couplings Analysis 
    Communication avec acte
    TOD, Georges; BARRE, Pierre-Jean; BOUDON, Benjamin; ccGOMAND, Julien; ccMALBURET, François (2013)
    This paper describes an energetic method using multibond graphs to model multi-physical systems. Its potential in building physical meaningful graphs that represent equivalent mathematical models of classic analytical ...
  • Towards an Energetic Modeling of Rotorcraft Using Bond-Graphs 
    Communication avec acte
    CHIKHAOUI, Zeineb; PAVEL, Marilena; BARRE, Pierre-Jean; ccGOMAND, Julien; ccMALBURET, François (American Helicopter Society (AHS) International, 2013)
    The paper presents an energetic method of helicopters dynamics analysis to study the air resonance (AR) phenomena. First, a brief state of art of AR phenomena is presented and a simple energetic explanation is given. ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales