Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Noise-source Identification of Evaporator Using Partial Coherence Function

부분기여도함수를 이용한 증발기의 소음원 분석

  • Published : 2009.04.20
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Abstract

Frequency analysis is one of the most useful way to analyze response signal for the purpose of grasping the dynamic characteristics of system through Fourier transformation. Although it is very effective way for frequency analysis, it is hard to analyze out a specific sound or vibration component which is correlated with others. In this thesis, source contribution analysis tool for NI-PXI equipment is developed with LabVIEW using coherences of MISO(multiple-input single-output) model. For the purpose of examining propriety of developed tool, simulation is performed with several correlated signals that have different frequency range. After checking the OCF(ordinary coherence function) and PCF(partial coherence function) of the each signal for concerned frequency domain, an experiment is conducted on an evaporator that cause the principal noise of a refrigerator. This developed tool will be expected to build up more convenient and serviceable measurement system.

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References

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  2. Noise-source Analysis of Tactical Vehicle Using Partial Coherence Function vol.26, pp.7, 2016, https://doi.org/10.5050/KSNVE.2016.26.7.774
  3. Vibration Identification of Gasoline Direct Injection Engine Based on Partial Coherence Function vol.36, pp.11, 2012, https://doi.org/10.3795/KSME-A.2012.36.11.1371