A5072843007- Aerodynamics and Acoustics in Jet Flows
- Noise Effects and Management
- Acoustic Wave Phenomena Research
- Air Traffic Management and Optimization
- Vehicle Noise and Vibration Control
- Robotic Path Planning Algorithms
- Aerodynamics and Fluid Dynamics Research
- Autonomous Vehicle Technology and Safety
- UAV Applications and Optimization
- Underwater Acoustics Research
- Sports Dynamics and Biomechanics
- Ship Hydrodynamics and Maneuverability
- Automated Road and Building Extraction
- Aerospace, Electronics, Mathematical Modeling
- Arctic and Antarctic ice dynamics
- Sports Performance and Training
- Maritime Navigation and Safety
- Sports injuries and prevention
- Flow Measurement and Analysis
- Vehicle Routing Optimization Methods
Hong Kong University of Science and Technology
2021-2025
University of Hong Kong
2021-2025
This paper presents an improved Gaussian beam tracing method to efficiently compute long-distance sound wave propagation in non-uniform mean flows. New dynamic ray equations are derived from the convected equation vicinity of path under high-frequency asymptotic and paraxial conditions, based on which solutions acoustic potential corresponding beams developed. The pressure at observer is accurately computed by integral superposition all vicinal beams, through a revised weighting function...
The vehicle routing problem is common for drone delivery in urban areas, and the strategies can impact both transport efficiency community noise. In this article, we propose an optimization method to reduce en route noise during process. A hybrid cost function adopted evaluate quality of strategies, considering path length. evaluated based on efficient flight simulation assessment platform, which enables accurate sound source modeling a practical propagation computation realistic...
The Gaussian beam tracing method has advantages in computing long-distance noise propagation outdoor environments due to its high efficiency. Usually, repeated computations are required if the target sound wave is broadband or contains multiple frequencies because was developed frequency domain. This paper presents an efficient computation of using tracing. approach based on fact that ray behaviors and source properties can be decoupled at frequencies, where equation asymptotically solved....
Unmanned aircraft systems (UAS) have promising potential for on-demand air transportation modes. Integration of UAS into existing airspace operations faces challenges, one these is the increased noise level caused by multiple vehicles operating within a limited airspace. Finding solutions to mitigate environmental crucial public acceptance and sustainable implementation in urban areas. In this paper, we introduce decentralized method guide flights, aiming minimize impact near intersection...
The operation of the rapidly growing unmanned aerial vehicles (UAV) and promising urban mobility (UAM) could have a significant noise impact on environment. In this work, we developed cloud-based simulator to efficiently assess environmental UAM UAV. sources long-distance propagation are computed by propeller prediction models an advanced Gaussian beam tracing method, respectively, in local high-performance computers. Users can define working conditions vehicle layer through platform with...
The rapidly emerging market of urban air mobility has raised considerable public concern about noise exposure and annoyance, which is likely to limit the development future aerial transportation. This study presents a comprehensive approach evaluate flight an vehicle under various operating conditions provide practical strategies for low-noise path planning. Two methods with different fidelity levels are considered compared in evaluating sound sources. first based on efficient semi-empirical...
This paper proposes a noise-aware flight path planning method to reduce the noise pollution caused by low-altitude flights of unmanned aerial systems (UAS) in urban areas. A assessment platform is used obtain maps at discretized airspace blocks, considering sound reflection and absorption obstacles, as well diffraction attenuation atmosphere. An improved cost-based A* algorithm employed search for optimal with minimum exposure level. Virtual simulations demonstrate effectiveness proposed...
In this work, the noise impact of delivery drones in an urban community is assessed based on a flight simulation and assessment platform. The tonal broadband components are considered using analytical semi-analytical prediction methods. propagation environment computed efficient Gaussian beam tracing method. influence speeds, payloads ground vegetation reception at different observation locations investigated. instantaneous sound level can be higher if drone operated relatively speed....