Measured Noise from Small Unmanned Aerial Vehicles
Measured Noise from Small Unmanned Aerial Vehicles
复制标题
测量小型无人机的噪声
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
F. Grosveld
中科院分区：
文献类型：
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作者：
R. Cabell;Robert G. McSwain;F. Grosveld
小型无人机(UAV)的拟议使用，包括家庭包裹递送，可能会使大部分社区暴露在新的噪声源之下。本文讨论了四架小型无人机的立交桥噪声测量结果，其中包括一架内燃机模型飞机和三架电池供电的多翼飞行器。讨论了这些车辆的基本噪声特性，包括频谱特性和声压级、有效感知噪声级和声暴露级等声级指标。特别是多翼飞行器的大小和空气动力学特性，使它们的飞行路线容易受到大风等大气干扰的影响。这些阵风，再加上一个飞行控制系统，通过改变转子速度来保持飞行器的稳定性，产生了不稳定的声学特征。在悬停和飞越两种情况下，研究了由这种不稳定引起的光谱变化。时变噪声不同于大型运输机产生的相对稳定的噪声，可能会使使用传统声级度量预测人类烦扰变得复杂。
Proposed uses of small unmanned aerial vehicles (UAVs), including home package delivery, have the potential to expose large portions of communities to a new noise source. This paper discusses results of flyover noise measurements of four small UAVs, including an internal combustion-powered model airplane and three battery-powered multicopters. Basic noise characteristics of these vehicles are discussed, including spectral properties and sound level metrics such as sound pressure level, effective perceived noise level, and sound exposure level. The size and aerodynamic characteristics of the multicopters in particular make their flight path susceptible to atmospheric disturbances such as wind gusts. These gusts, coupled with a flight control system that varies rotor speed to maintain vehicle stability, create an unsteady acoustic signature. The spectral variations resulting from this unsteadiness are explored, in both hover and flyover conditions for the multicopters. The time varying noise, which differs from the relatively steady noise generated by large transport aircraft, may complicate the prediction of human annoyance using conventional sound level metrics.