ACTIVE CONTROL OF TRANSMISSION NOISE IN A BELL 407 HELICOPTER

机译：贝尔407直升机的传输噪声主动控制。

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Cabin noise is a major source of discomfort for helicopter passengers. One of the main sources of noise is the main rotor drive and gearbox assembly, whose structural vibrations are primarily transmitted through supporting struts and mounts to the airframe, which then radiates sound into the cabin. The vibration and resulting noise occur mainly at discrete gear meshing frequencies in the frequency range kHz. The objective of this work was to establish the feasibility of an active control system to reduce multi-harmonic transmission noise in helicopter cabins. The system development, implementation and testing were conducted on a Bell 407 aircraft.

机译：机舱噪音是直升机乘客不舒服的主要原因。噪声的主要来源之一是主旋翼驱动器和变速箱组件，其结构振动主要通过支撑杆传递并安装到机身，然后将声音辐射到机舱中。振动和产生的噪声主要发生在频率范围为kHz的离散齿轮啮合频率处。这项工作的目的是确定一种主动控制系统的可行性，以减少直升机机舱内的多谐波传输噪声。系统开发，实施和测试是在Bell 407飞机上进行的。

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《American Helicopter Society International annual forum》|2014年|174-182|共9页
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Y. Pasco; A. Berry; A. Grewal; S. Laurier Chapleau;
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1. Bell Helicopter and PHI Sign Aareement for 2 Bell 407s [J] . International aerospace review & analysis . 2011,第1期

机译：2架Bell 407的贝尔直升机和PHI签署协议
2. Bell Helicopter Reduces Direct Operating Costs for Proven Bell 407 Helicopter [J] . International aerospace review & analysis . 2010,第5期

机译：贝尔直升机降低了经过验证的贝尔407直升机的直接运营成本
3. Bell Helicopter sells 24 Model 407 helicopters destined for Iraqi air force [J] . Military & Aerospace Electronics . 2009,第7期

机译：贝尔直升机公司售出24架用于伊拉克空军的407型直升机
4. ACTIVE CONTROL OF TRANSMISSION NOISE IN A BELL 407 HELICOPTER [C] . Y. Pasco, A. Berry, A. Grewal, American Helicopter Society International annual forum . 2014

机译：钟声407直升机中的传输噪声的主动控制
5. Active jet acoustic control of low frequency, in-plane helicopter harmonic noise. [D] . Sargent, D. Caleb. 2012

机译：主动式喷气声控制低频，平面直升机谐波噪声。
6. An experimental model to measure the ability of headphones with active noise control to reduce patient’s exposure to noise in an intensive care unit [O] . Stuart Gallacher, Doyo Enki, Sian Stevens, 2017

机译：一个实验模型用于测量具有主动噪音控制功能的耳机的功能以减少患者在重症监护室中的噪音暴露
7. AE-499 Bell Helicopter model 407 _Project Presentation [O] . Abdallah Ayman M. 100

机译：aE-499贝尔直升机模型407 _项目介绍
8. Helicopter Noise Measurements Data Report. Volume I. Helicopter Models: Hughes 300-C. Hughes 500-C, Bell 47-G. Bell 206L. [R] . True, H. C., Letty, R. M. 1977

机译：直升机噪声测量数据报告。第一卷直升机型号：休斯300-C。休斯500-C，贝尔47-G。贝尔206L。

ACTIVE CONTROL OF TRANSMISSION NOISE IN A BELL 407 HELICOPTER

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