Descripción del proyecto
Abordar el ruido dentro de las aeronaves
¿Existe alguna forma de abordar el ruido que hay dentro de una aeronave de rotor inclinable? La falta de comodidad acústica en la cabina de pasajeros es un problema exigente y difícil en este tipo de aeronaves. El proyecto PIANO, financiado con fondos europeos, pretende avanzar en esta cuestión combinando el análisis avanzado de la ruta de transmisión (AART) y las tecnologías de cancelación activa del ruido (CAR). La aplicación del AART servirá para obtener un conocimiento detallado de las características vibroacústicas de los rotores inclinables. Antes de este paso, se implementará una técnica de agrupamiento para dividir el rotor inclinable en un conjunto de subsistemas vibroacústicos. Sobre la base de los resultados del AART, se aplicarán tecnologías innovadoras de CAR para reducir el ruido tonal y de banda ancha por un coste razonable teniendo en cuenta el peso de la aeronave.
Objetivo
Interior noise in tiltrotor aircrafts is becoming more and more important. Customers are more aware of noise as a key element for comfort and health. This project aims to investigate two topics to further deepen the analysis and the improvement of interior noise in civil tilt rotors.
The first topic is the Advanced Transfer Path Analysis application in a tiltrotor. ATPA is a powerful analysis method to quantify noise and vibration paths in a complex structure, as well as differentiate air-borne from structure-borne paths.
Currently, simulation models based on SEA are widely used to predict aircraft interior noise. The accuracy of the input model parameters has a direct impact on the model results. The knowledge on how to model junctions is a key point to obtain a realistic model. The experimental characterization of the aircraft through ATPA has the objective to deduce the SEA factors.
As a first step, prior to the paths identification, the complex system has to be defined as a set of subsystems. A clustering technique based on the DTF matrix is proposed here, with the aim of dividing the studied system in vibroacoustic subsystems. Once the subsystems are well-defined, ATPA will be experimentally applied. This will provide a deep characterization of the system from a vibroacoustic point of view and will be used as input for SEA factors derivation.
The second topic is the mitigation of tonal noise through innovative active noise control techniques. Low frequency and tonal noise sources are difficult to be improved with classical passive solutions. Nowadays, ANC systems may reduce noise both locally or globally. Innovation is centered in achieving a remarkable reduction of tonal noise, without increasing too much weight and at a reasonable cost. A complete definition of the architecture and the components ready to be installed will be supplied.
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RIA - Research and Innovation actionCoordinador
08035 Barcelona
España
Organización definida por ella misma como pequeña y mediana empresa (pyme) en el momento de la firma del acuerdo de subvención.