| Autor: |
Martin L Barlett, H. R. Nelson, G. D. Meegan, Gary R. Wilson |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
The Journal of the Acoustical Society of America. 106:L1-L6 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.427611 |
| Popis: |
This paper describes new engine fault detection methods that involve a higher order spectral analysis method known as the parametric spectral coherence (PSC). Measurements of radiated acoustic and vibrational signatures were conducted on a one-cylinder engine with a continuously worsening loss of cylinder compression. Compared to vibrational signatures, the radiated acoustic signatures provided the most dramatic indication of a loss of cylinder compression when PSC analysis was performed. It is demonstrated that the fault can be detected by simply monitoring the average spectral coherence or the peak spectral coherence of the acoustic signature, whereas the more traditional power spectral methods fail to detect the fault. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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