航天推进技术研究院主办
[1]孙百红,宋少伟.基于小波分析的发动机转动惯量测量信号特征提取[J].火箭推进,2010,36(06):52-55.
SUN Bai-hong,SONG Shao-wei.Feature extraction for measurement signal of engine rotary inertia moment based on wavelet analysis[J].Journal of Rocket Propulsion,2010,36(06):52-55.
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SUN Bai-hong,SONG Shao-wei.Feature extraction for measurement signal of engine rotary inertia moment based on wavelet analysis[J].Journal of Rocket Propulsion,2010,36(06):52-55.
基于小波分析的发动机转动惯量测量信号特征提取
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
36
期数:
2010年06期
页码:
52-55
栏目:
测控与试验
出版日期:
2010-12-15
- Title:
- Feature extraction for measurement signal of engine rotary inertia moment based on wavelet analysis
- 文章编号:
- 1672-9374(2010)06-0052-04
- Keywords:
- engine; wavelet analysis; feature extraction
- 分类号:
- V434.12-33
- 文献标志码:
- A
- 摘要:
- 在采用单摆法进行某型号发动机整机转动惯量测量中，发现测量信号含有许多其他信号成分，这给准确提取发动机转动惯量相关参数带来一定的干扰。利用小波多分辨分析特性对测量信号进行处理分析，有效地将实际有用信号和干扰信号分开。通过对有用信号的分析，准确提取到了整个振动系统的振动频率、对数衰减及阻尼系数等参数，并分析了系统阻尼对振动频率的影响；通过对干扰信号的特征分析，弄清了干扰源，发现了实验设备存在的工艺缺陷。将小波分析应用于发动机实际工程测试和分析，能准确提取结构动力学参数、提高测量精度及进行故障分析。
- 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.
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备注/Memo
收稿日期：2010-０9-１1；修回日期：2010-10-20
基金项目：国家航天技术支撑项目
作者简介： 孙百红（1976—），女，硕士，研究领域为发动机结构强度分析与数据处理
更新日期/Last Update:
1900-01-01