对变频供电下特有的振动噪声源进行了识别，揭示了产生电机高频振动噪声的原因。
The source of noise and vibration of PMSM fed by inverter are identified. Reasons of resulting in noise and vibration in high-frequency was revealed.
运用主成分分析方法，经过矩阵变换，提取振动信号的主要信息，从而实现对振动噪声源的分析。
The main vibration signals can be obtained by reducing its dimensions through matrix conversion in the principal component analyzed, and realize the analysis to the vibration noise source.
与普通电机一样，振动噪声也是永磁电机的一个重要性能指标，因此研究永磁电机的振动噪声源就显得十分有意义。
Like ordinary motors, noise and vibration of PMSM are also important performance indicators. Therefore, it is very meaningful to study noise and vibration source of PMSM.
锤片式粉碎机是饲料生产中的主要设备，也是饲料厂中的主要振动和噪声源。
In feed plant, hammermill is one of main facilities, and also a main resource of vibration and noise.
轮胎作为现代汽车的主要噪声源之一，其胎面振动被认为是主要发声机理之一。
One of major noise sources of modern automobile is tire whose vibration is considered a main cause of noise.
通过测量柴油机表面振动速度的方法对其进行了表面噪声源识别的研究。
An experimental study on the engine noise source identification by the method of surface vibration measurement technique is carried out in this paper.
本文以脉动半球声源为基本物理模型，推导了由振动量计算振动点的界面噪声的理论公式。
This paper develops a theoretical formula for calculating interfacial noise of vibrating point from its vibratory quantity with pulse semisphere sound source as basic physical model.
根据所得结论，在简化的客车有限元模型上的适当位置安放次级声源，对因发动机振动激励引起的噪声进行车内有源消声的仿真分析。
Simulations about reducing noise excited by engine revolution are done by laying secondary source at proper places on the simplified finite element model of a passenger car.
作为一种诊断结构缺陷和识别噪声源的工具，它可以确定结构振动的大小，判断结构振动的主要传播途径。
As a tool of diagnosing defect and identifying the source of vibration, it can judge the magnitude of structural intensity and make out the main route of vibration transmission.
圆锯片的振动是金属锯切噪声的主要声源之一。
The vibration of the circular saw plate is a main sound source in the metal sawing noise.
重点讨论了旋转机械源（包括振动激励源与噪声源）混合模式及源波形恢复问题。
This paper focused on such problems as mixing models of sources of rotation machines (including vibratory and acoustical sources) and their waveform restoral.
讨论了旋转机械源(振动激励源与噪声源)混合模式及源波形恢复的问题。
Such problem as mixing model of rotating machine sources (including vibratory and acoustical source) and their waveform restoration is discussed.
对一台噪声较大的齿轮箱做了振动噪声试验，通过分析识别出噪声源为一对啮合的齿轮。
An NVH experiment is done on the gearbox and the noise source is found through the analysis.
对一台噪声较大的齿轮箱做了振动噪声试验，通过分析识别出噪声源为一对啮合的齿轮。
An NVH experiment is done on the gearbox and the noise source is found through the analysis.
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