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- The acoustic noise generated by the rotate point source, UH-1H rotor in hover and AH-l/OLS in forward flight were calculated, and the computed results from several methods were compared with each other and with the experimental data. 采用旋转点源、UH-1H悬停旋翼、AH-1/OLS前飞旋翼作为算例,对所采用的各种噪声预测方法进行了比较。
- Analysis on acoustic noise generation mechanism of a steam-jet in water 蒸汽在水下有限空间内喷注时喷注噪声的声源分析
- Acoustic Noise Generator 噪音发生器
- Some common measures to reduce mechanical acoustic noise are summarized. 并对一些常用的降低电机机械噪声的措施和方法进行了综述。
- The wide application of switched reluctance motor(SRM) is limited by their higher vibration and acoustic noise. 针对开关磁阻电动机运行的振动和噪声问题,基于频域分析方法,研究了电压PWM运行方式下,采用两步换相法降低开关磁阻电动机振动和噪声的机理。
- Considerable vibration and acoustic noise limit the application of Switched Reluctance Motors (SRMs). 大的振动和噪声阻碍了开关磁阻电机的推广应用。
- Part II of this Lab examines a technique for minimizing the effects of scanner acoustic noise on auditory activation. 本实验的第二部份,要探讨减低造影仪噪音的技术对听觉活化的影响,这个技术称为集中扫瞄法。
- Acoustic sheds shall be provided to enclose the noise generating part of oscillators and drill-rigs to achieve at least 15dB(A) noise reduction. 此外,亦须设置隔音棚,以便把振荡器及钻架发出的噪音减少至少15分贝(A)。
- The Nautilus meets withstands shock, vibration, salt, fog, drip, fungus, acoustic noise, and EMI. 鹦鹉螺还能抵抗撞击、振动、防盐防雾、防渗水并能经受噪声和电磁干扰的影响。
- It means that usually the SMPS is the strongest electrical noise generator in the whole system. 这意味着开关电源通常是电子设备里的最强干扰源。
- Excellent acoustic noise reduction features, users create a work of quiet living environment. 卓越的隔声降噪功能,为使用者创造宁静的工作生活环境。
- DMM can upset sensitive circuits from noise generated inside it. 内部产生的噪声会干扰敏感电路。
- Using the acoustic noise signal generated by driving motor vehicles to vehicle classification is a new and promising method. 利用车辆行驶过程中所产生的声频噪声信号进行车型分类是一种新方法,有较大应用前景。
- This paper also investigated the influence of the zero vector and PWM switching frequency on the acoustic noise radiated by induction machine. 选择适当的PWM开关频率能有效地降低电机的噪声·
- Cogging torque is one of the most important parameters of PM motors,which causes torque ripple,vibration and acoustic noise. 齿槽转矩是永磁电机最重要的参数之一,它的存在会造成电机的转矩波动、振动和噪声。
- Cogging torque is one of the most important parameters of PM motors, which causes torque ripple, vibration and acoustic noise. 摘要齿槽转矩是永磁电机最重要的参数之一,它的存在会造成电机的转矩波动、振动和噪声。
- As the radial vibration of stator is the origin of the acoustic noise of SRMs, model analysis of stator vibration is the effective way to the research for low acoustic noise. 由于定子的径向振动是开关磁阻电机噪声的主要根源,因此定子振动系统的模态分析是降噪研究的有效手段。
- The noise generated by these resistors is less than -40 dB, or essentially noise-free. 这些电阻产生的噪声不足-40dB,或者基本上无噪声。
- Research on torque ripple and acoustic noise reduction in switched reluctance motor (SRM) is one of the important topics in developing the performance of switched reluctance drives (SRD). 研究抑制开关磁阻电机(SRM)的振动和噪声是改善开关磁阻电动机调速系统(SRD)性能的重要课题之一。
- That is, noise generated inside a factory or other industrial undertaking, which affects employees in that work-place. 即从工厂或其他工业场所发出而影响该等工作地点内的雇员的噪音。
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