Computational aeroacoustics of quadcopter drones

Dbouk, T.; Drikakis, Dimitris

doi:10.1016/j.apacoust.2022.108738

Cited by 10 publications

(3 citation statements)

References 28 publications

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“…Hu et al 23 studied the relationship between motor vibration and drone stability to prevent excessive motor vibration from causing greater damage to the drone during flight. There are also many researchers who have studied the overall impact of drone vibration, such as Russell et al 24 used a wind tunnel to conduct experiments on multirotor drones to determine forces and moments and electric motor vibrations, and Dbouk and Drikakis 25 proposed a low-cost method for calculating the aerodynamic noise of multi-rotor drones. So it is necessary to pay more attention to the structural impact of drone vibration and to develop ways to reduce it in order to improve the performance of safety and comfort for passenger drones.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the structural vibrations of multi-rotor passenger drones

Chen,

Meng,

Wang

et al. 2023

International Journal of Micro Air Vehicles

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In order to solve the structural damage problem of the first generation of large multi-rotor manned drones, the present work has designed to study the structural vibration problems of multi-rotor drones. On a small multi-rotor drone, the laser vibration meter verified the reliability of acceleration sensor measurement of vibration and found that circular shape carbon fiber arms have strong damping abilities, with the strongest vibration in the Z-axis direction. To improve the design of the second generation of large multi-rotor manned drones, elliptical shape carbon fiber arms were employed instead of circular arms. Experiments showed that the main vibrations of the large multi-rotor manned drone’s arm are low-frequency vibrations below 200Hz, producing mainly torsional and bending modes, and the elliptical carbon fiber arms significantly reduce vibrations in the Z-axis direction. This study provides experimental data support for multi-rotor manned drones and further presents an improvement strategy for suppressing the vibrations of the multi-rotor manned drones.

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Section: Introductionmentioning

confidence: 99%

An investigation on the structural vibrations of multi-rotor passenger drones

Chen,

Meng,

Wang

et al. 2023

International Journal of Micro Air Vehicles

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“…1 Aerodynamics and aero-acoustics of propellers and rotors have been under investigation for decades. 3,4 Examples of previous aero-acoustic research have focused on a single isolated rotor (without a wing underneath), 1,[5][6][7][8][9] two or multiple tandem rotors (without a wing underneath), [10][11][12][13] and scaled tiltrotor models (with a wing underneath): V-22 14 and XV-15. [15][16][17] The aforementioned aeroacoustic studies on the V-22 (Figure 1 31 (c) Germandrones Songbird, 32 and (d) Wingcopter.…”

Section: Introductionmentioning

confidence: 99%

Acoustic measurements in single-rotor/wing interaction at low disk loading and Reynolds number

Chen,

Hua,

Maier

et al. 2023

International Journal of Aeroacoustics

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The tiltrotor design is favored for urban air mobility (UAM) prototypes due to the combination of vertical takeoff and landing (VTOL) capability and efficient forward flight. With rising UAM air traffic at low altitudes, noise from these aircraft is a crucial design factor. Most tiltrotor noise research focuses on high disk loading and Reynolds number setups, leaving smaller aircraft configurations less explored. This study investigates aero-acoustic trends from rotor-wing interaction at low disk loading ([Formula: see text]100 N/m2) and Reynolds number (Re < 100,000). While prior literature suggests lowering disk loading and reducing rotor wake interference can mitigate rotor noise, such ideas lack empirical validation. The setup involves an anechoic chamber housing a two-blade rotor, along with flat and NACA 0012 airfoil wings. Microphones and a rotation stage capture acoustic data for analysis. Factors like flow recirculation, isolated rotor noise, rotor height, rotation direction/rate, and wing curvature are assessed for impact on noise signature. It is found that the deflected rotor wake in rotor-wing interaction significantly increases low-frequency broadband noise and overall sound pressure level (OASPL), compared to an isolated rotor. Dominant tonal noise diminishes based on the strength of the deflected rotor wake. These findings offer insights into reducing noise from rotor wake impingement on the wing.

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“…Un dron cuadricóptero es un dispositivo mecatrónico multi-rotor que consta de cuatro brazos en los cuales en su parte final se ubican hélices accionadas por actuadores electrónicos (Bhandari et al, 2019). Esta tecnología ha sido testigo de una considerable demanda en el mercado durante los últimos años, debido a la simplicidad y el bajo costo de sus sistemas mecánicos y dinámicos (Dbouk y Drikakis, 2022). Los drones cuadricópteros se han utilizado en diversas aplicaciones como lo son el monitoreo de condiciones ambientales, seguridad, gestión de desastres, manejo de tráfico, vigilancia, entrega de productos y desarrollos agrícolas (Hedworth et al, 2021).…”

Section: Introductionunclassified

Fabricación y caracterización morfológica, mecánica y dinámica de un cuadricóptero elaborado con material compuesto de fibra de fique

2022

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El presente estudio describe la fabricación de un dron cuadricóptero elaborado en material compuesto reforzado con fibra de fique, el cual fue caracterizado morfológica, mecánica y dinámicamente. El marco del cuadricóptero se fabricó utilizando 6 capas de fique (35.4% del peso) y una matriz de poliéster. La electrónica y el sistema de control se basaron en el uso de la arquitectura Arduino Nano. El análisis morfológico por microscopia electrónica mostró delaminación de la matriz y una adhesión media resina-fibra. La caracterización mecánica se realizó en dirección longitudinal y transversal obteniéndose un esfuerzo máximo de tensión de 32.20 MPa y 25.72 MPa respectivamente. La mayor amplitud de vibración se da a la frecuencia de operación de los motores, siendo esta 89 Hz. En conclusión, el dron puede entrar en resonancia ya que para llegar a la frecuencia de operación de los motores se debe excitar la primera frecuencia natural del marco.

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Computational aeroacoustics of quadcopter drones

Cited by 10 publications

References 28 publications

An investigation on the structural vibrations of multi-rotor passenger drones

An investigation on the structural vibrations of multi-rotor passenger drones

Acoustic measurements in single-rotor/wing interaction at low disk loading and Reynolds number

Fabricación y caracterización morfológica, mecánica y dinámica de un cuadricóptero elaborado con material compuesto de fibra de fique

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