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Noise attenuation of quadrotor using phase synchronization method

机译：使用相位同步方法的四轮压力机噪声衰减

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摘要

The annoying noise produced by the rotors of multi-rotor aircraft can bring severe disturbance to the residents. Hence, it is essential to reduce the noise level of multi-rotor aircraft for its further development. In this paper, an attempt is made that applying the phase synchronization method to the multi-rotor aircraft for noise reduction, and the feasibility and potential are explored by the means of simulations. Firstly, the aerodynamic noise prediction model is established by combining the free wake method and the Ffowcs Williams-Hawkings equation. On this basis, the multi-island genetic optimization algorithm is employed to obtain the optimal phase angles which can minimize the noise level at the objective positions. Then, the noise attenuation simulations of the quadrotor at a single observation and a finite region are studied with different advance ratios, and the noise attenuation mechanism is analyzed. Finally, the noise reduction benefits of the square quadrotor and the diamond quadrotor are compared. The simulation results show that, for the observation plane 5 m below the vehicle, through employing the phase synchronization method, the noise level of a single observation point can be reduced by up to 30 dB, and the noise level of the forward quarter can be reduced by up to 12 dB. Therefore, it can be confirmed that the phase synchronization method shows an excellent noise attenuation potential for quadrotor. (C) 2021 Elsevier Masson SAS. All rights reserved.
机译：多转子飞机转子产生的令人讨厌的噪音可以对居民带来严重的干扰。因此，必须降低多转子飞机的噪声水平，以实现其进一步的发展。在本文中，尝试将相位同步方法应用于用于降噪的多转子飞机，并且通过模拟手段探讨了可行性和潜力。首先，通过组合自由唤醒方法和FFOWCS-Hawkings方程来建立空气动力学噪声预测模型。在此基础上，采用多岛遗传优化算法来获得最佳相位角，这可以最小化目标位置处的噪声水平。然后，利用不同的预先比率研究了单个观察和有限区域时的四元电机的噪声衰减模拟，并且分析了噪声衰减机构。最后，比较了方形四轮电机和钻石四轮运动的降噪益处。仿真结果表明，对于车辆下方的观察平面5m，通过采用相位同步方法，可以减少多达30dB的单个观察点的噪声水平，并且前部季的噪声水平可以是减少12 dB。因此，可以确认相位同步方法显示了足够的噪声衰减电位。 （c）2021 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2021年第11期|107018.1-107018.14|共14页
  • 作者

    Guan Shujun; Lu Yang; Su Taoyong; Xu Xice;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut Coll Aerosp Engn Natl Key Lab Rotorcraft Aeromech Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut & Astronaut Coll Aerosp Engn Natl Key Lab Rotorcraft Aeromech Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut & Astronaut Coll Aerosp Engn Natl Key Lab Rotorcraft Aeromech Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut & Astronaut Coll Aerosp Engn Natl Key Lab Rotorcraft Aeromech Nanjing 210016 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Multi-rotor aircraft; Quadrotor; Phase synchronization; Noise reduction; Free wake; FW-H equation;

    机译：多转子飞机;四轮运动;相位同步;降噪;自由唤醒;FW-H方程;

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