Feature extraction for measurement signal of engine rotary inertia moment based on wavelet analysis(PDF)
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
- Issue:
- 2010年06期
- Page:
- 52-55
- Research Field:
- 测控与试验
- Publishing date:
Info
- Title:
- Feature extraction for measurement signal of engine rotary inertia moment based on wavelet analysis
- Author(s):
- SUN Bai-hong; SONG Shao-wei
- Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
- Keywords:
- engine; wavelet analysis; feature extraction
- PACS:
- V434.12-33
- DOI:
- -
- Abstract:
- Some undesired signals which brought some difficulties for extracting parameters of engine inertia moment were found in a certain engine inertia moment measurement. The useful signals were separated from the undesired signals through the wavelet multi-resolution-analysis. Some engine parameters such as vibrational frequency, logarithmic decrement and the damping ratio were obtained from the useful signals. The impact of the damping on the vibrational frequency of the system was also analyzed. The interference sources and the technique defects were found by the feature analysis of the undesired signals. Results show that the wavelet analysis is a useful tool that may be used to extract the structural dynamic parameters, improve the measurement accuracy and locate the damage in the engine system.
Last Update: 1900-01-01