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http://dx.doi.org/10.5050/KSNVN.2009.19.4.347

Noise-source Identification of Evaporator Using Partial Coherence Function  

Choi, Ki-Soo (부산대학교 대학원 기계공학부)
Jeong, Wei-Bong (부산대학교 기계공학부)
Han, Hyung-Suk (국방기술품질원)
Kim, Min-Seong (부산대학교 대학원 기계공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.4, 2009 , pp. 347-354 More about this Journal
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.
Keywords
Source Identification; MISO; Coherence; OCF; PCF; LabVIEW;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Sim, H. J. and Oh, J. E., 2006, 'Source Identification of Non-stationary Sound/Vibration Signals Using Multi-dimensional Spectral Analysis Method,' Transactions of the Korean Society of Mechanical Engineers, Vol. 30, No. 9, pp. 1154-1159   DOI   ScienceOn
2 Kim, H. S. and Oh, J. E., 2007, 'The Analysis of Noise Contribution about Drum Washer under Dehydrating Condition Using Multi-dimensional Spectral Analysis,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 17, No. 11, pp. 1056-1063   DOI   ScienceOn
3 Bendat, J. S. and Piersol, A. G., 1993, 'Engineering Application of Correlation and Spectral Analysis,' 2nd Ed., John Wiley& Sons, Inc
4 Bendat, J. S. and Piersol, A. G., 2000, 'Random Data : Analysis and Measurement Procedures,' 3rd Ed., John Wiley&Sons, Inc
5 Maia, N. M. M., 1998, 'Theoretical & Experimental Modal Analysis, Research Studies Press LTD.
6 Shu, G. and Liang, X., 2007, 'Identification of Complex Diesel Engine Noise Sources Based on Coherent Power Spectrum Analysis,' Mechanical Systems and Signal Processing, Vol. 21, Issue 1, pp. 405-416   DOI   ScienceOn