New indices in the sequency domain and their application to condition monitoring of mechanical systems

✍ Scribed by Yuling Yan; Taro Shimogo

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 485 KB
• Volume: 4
• Category: Article
• ISSN: 0888-3270
• DOI: 10.1016/0888-3270(90)90007-8

✦ Synopsis

In this paper, some new indices in the sequency domain are defined describing the vibroacoustical process of machinery based on the fast Walsh transform. The Rice frequency is a useful index for detecting the change of power spectral components but it cannot be obtained easily and quickly. Here we define four indices in the sequency domain. Two of them are dimensional in nature and express the central sequency number and the rms sequency number and two are, dimensionless factors showing the dispersion and kurtosis of the spectral distribution. Computer simulation results for non-linear systems with different parameters are presented and shown to be effective in detecting changes in power spectral components.