Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Office National D'etudes Et De Recherches Aerospatiales (onera)

Office National D'etudes Et De Recherche Aerospatiales

Etat Francais Represente Par Le Delegue General De L'armement

Office National D'etudes Et De Recherches Aerospatiales

Laurent Binet

Max Abildgaard

Marc Prunel

Stéphane Pezet

A device for detecting the approach of a vortex ring state for a rotary wing aerodyne, the detection device including a set of vibration sensors configured to be distributed in or on the aerodyne, and a data processing unit configured to receive in real time measurement data from the sensors, process the data in order to calculate in real time the vibration spectrum of the aerodyne, detect in real time, by vibration analysis, the approach of a vortex ring state as a function of the calculated vibration spectrum, and issue an alarm in the event of detection of the approach of a vortex ring state.

Device for detecting the approach of a vortex ring state, rotary-wing aerodyne comprising said device, and associated method

A method for early detection of the vortex ring state in a helicopter includes steps of establishing flight control signals for flight control with regard to the vertical movement axis of the helicopter, detecting resultant movements in the vertical movement axis of the helicopter, and detecting an impending vortex ring state of the helicopter in accordance with a correlation between the flight control signals and the vertical movements in the vertical movement axis.

Early identification of a vortex ring phase

Growing community of inventors

Grans, France

Laurent Binet