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- FAN'S FAULT DIAGNOSIS BY NOISE FREQUENCY SPECTRUM 利用噪声频谱进行风机故障诊断
- noise frequency spectrums 噪声频谱
- Frequency Spectrum Measurement of Noise of Image Intensifiers[J]. 引用该论文 钱芸生;常本康;童默颖;刘磊.
- noise frequency spectrum 噪声谱
- A filter whose transfer function is matched with the frequency spectrum function of input signal. 其传递函数与输入信号的频谱函数相匹配的一种滤波器。
- The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of uexp( tt/ Pw) Multiply by Carrier with Uniform Phase Noise. 单边递减波电压讯号乘上含有均匀相位杂讯载波之调变讯号时域波形及频谱。
- The Time Domain Wave Form and Frequency Spectrum of Signal Tria(tt/Pw) Multiply by Normal Noise. 三角波电压讯号乘上准常态杂讯之时域波形及频谱。
- The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of Rect(tt/Pw) Added by Uniform Noise. 方波电压讯号加上均匀杂讯乘以无杂讯载波之调变讯号时域波形及频谱。
- The Time Domain Wave Form and Frequency Spectrum of Signal eexp(2*tt/Pw) Added by Uniform Noise. 双边递减波电压讯号加上均匀杂讯之时域波形及频谱。
- Alters the frequency spectrum of signals passing through it. 当通过它时能够改变信号的频谱。
- The inverted frequency spectrum,in fact, is Fouriers retransform. 倒频谱是频域信号的傅里叶再变换。
- An aerodynamic noise is confirmed to be the strongest one according to the test and analysis of the frequency spectrum of the noise from LGA fan. 通过对LGA风机噪声频谱的测试分析,确认其空气动力性噪声最强。
- The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of Tria(tt/Pw) Multiply by Carrier with Normal Phase Noise. 三角波电压讯号乘上含有准常态相位杂讯载波之调变讯号时域波形及频谱。
- In this paper, the source of noise in automobile power steering pump(APSP) is revealed on the basis of the analysis to the frequency spectrum of APSP. 根据汽车动力转向泵的频谱分析,揭示了汽车动力转向泵的噪声主要来源。
- For anharmonic trap, this excitation has energy-selective characters, and depends on the frequency spectrum of the current noise. 对于非简谐阱,这种激发具有能量选择特性,它又取决于电流噪声的频谱分布。
- The load of BMPS was measured by the noise frequency determined methods, and it made a steady foundation for the automatic control of BMPS. 磨机负荷的检测采用了目前最为成熟的音频测量法,为实现制粉系统的自动控制奠定了坚实基础。
- In order to reduce the noise of large cold saw, characteristics of its frequency spectrum was analyzed, Using water curtain to reduce noise has made certain effects, and the noise is redced from 108 dB to 89 dB.? 为了降低大冷锯的噪声,对其频谱特性进行了分析研究,并采用水幕技术降低噪声,取得了一定效果,使噪声由108分贝降至89分贝。
- From piezoelectricity theory and vibration outlook, we can aim at some of main noise frequency , to design the best size of PVDF piezoelectric film for eliminate this frequency noise. 由压电理论及振动观点,本研究针对某一主噪音频率,研究能消除此一主频率噪音之PVDF压电薄膜消音器之最佳尺寸。
- A system that divides the frequency spectrum of a signal into a number of bands, which are separately transmitted and then recombined. 一种先将一个信号的频谱分成几个可独立传送的频带然后再合成的方法。
- According to the frequency spectrums structure,we analyze a comb filter's (COF)feature that can separate Y and C from PAL TV signals fully. 根据连续、慢变化电视信号的频谱结构,分析彻底分离PAL信号的Y、C所需要的数字梳状滤波器特性;