Abstract
This paper investigates the application of empirical mode decomposition (EMD) to signal trend extraction. EMD can decompose any signal into sum of intrinsic mode functions (IMF) plus a residual. Thus, the signal trend is defined as the residual or sum of several IMF components whose frequency content is lower than a given value. Both simulated and field measured signal are employed in this study to demonstrate the feasibility of the approach. The results show that the trend can be extracted directly from the measured signal using the EMD approach without any presumptions of the trend type. It is concluded that the EMD approach is a promising tool for signal trend extraction.
| Original language | Chinese (Simplified) |
|---|---|
| Pages (from-to) | 101-104 |
| Number of pages | 4 |
| Journal | Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis |
| Volume | 25 |
| Issue number | 2 |
| Publication status | Published - 1 Jun 2005 |
Keywords
- Empirical mode decomposition
- Intermittency check
- Trend
- Vibration signal
ASJC Scopus subject areas
- Instrumentation
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering