自适应广义S变换在内燃机气缸盖振动特性研究中的应用

郑旭;郝志勇;金阳;卢兆刚

振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 167-170.

PDF(1774 KB)
PDF(1774 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 167-170.
论文

自适应广义S变换在内燃机气缸盖振动特性研究中的应用

  • 郑旭;郝志勇;金阳;卢兆刚
作者信息 +

The Application of Adaptive Generalized S Transform in Vibration Characteristics Analysis of IC Engine Cylinder Head

  • Zheng Xu;Hao Zhi-Yong; Jin Yang;Lu Zhao-Gang
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摘要

提出了一种基于时频分辨率最优化的自适应广义S变换,并通过仿真试验,比较了自适应广义S变换与短时傅里叶变换和S变换的时频分析结果,证明了自适应广义S变换具有更高的时频分辨率。对某4缸4冲程汽油机气缸盖的振动信号进行时频分析,结果表明自适应广义S变换得到的时频分布比S变换具有更高的时频分辨率,能够较为准确地分辨出气缸盖振动的主要激励源及其时频特性,研究结论可为低振动噪声内燃机改进设计提供指导。


Abstract

An adaptive generalized S transform (AGST) is introduced in this paper. The simulation shows that the time-frequency resolution obtained by AGST is better than S transform and STFT. Then, the proposed method is introduced to analyze the vibration characteristics of the cylinder head of a four-cylinder IC engine. The result indicates that time-frequency representation obtained by AGST method has a better time-frequency resolution than S transform, and could exactly reveal the vibration characteristics of the internal combustion (IC) engine cylinder head. The research achievements could provide guidance for the following research of the vibration control and structural optimization for this IC engine.

关键词

内燃机 / 气缸盖 / 振动 / 自适应广义S变换 / 时频分辨率

Key words

IC engine / Cylinder head / Vibration / AGST / Time-frequency resolution

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郑旭;郝志勇;金阳;卢兆刚. 自适应广义S变换在内燃机气缸盖振动特性研究中的应用[J]. 振动与冲击, 2011, 30(1): 167-170
Zheng Xu;Hao Zhi-Yong;Jin Yang;Lu Zhao-Gang. The Application of Adaptive Generalized S Transform in Vibration Characteristics Analysis of IC Engine Cylinder Head [J]. Journal of Vibration and Shock, 2011, 30(1): 167-170

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