| 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 |
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| 引用本文： | 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. |
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| 作者姓名： | 郑旭 郝志勇 金阳 卢兆刚 |
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| 作者单位： | 浙江大学 能源工程系，浙江 杭州310027 |
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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。
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| 关 键 词： | 内燃机 气缸盖 振动 自适应广义S变换 时频分辨率 |
| 收稿时间： | 2009-9-21 |
| 修稿时间： | 2009-11-19 |
Application of adaptive generalized S-transformation in vibration characteristics analysis of an IC engine cylinder head |
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| ZHENG Xu,HAO Zhi-yong,JIN Yang,LU Zhao-gang.Application of adaptive generalized S-transformation in vibration characteristics analysis of an IC engine cylinder head[J].Journal of Vibration and Shock,2011,30(1):167-170. |
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| Authors: | ZHENG Xu HAO Zhi-yong JIN Yang LU Zhao-gang |
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| Affiliation: | Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, China |
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| Abstract: | An adaptive generalized S-transformation(AGST) was introduced here.A simulation showed that the time-frequency resolution obtained with AGST is better than those with S-transformation and STFT.Then,the proposed method was introduced to analyze the vibration characteristics of a cylinder head of a four-cylinder internal combustion (IC) engine.The results indicated that the time-frequency representation obtained with AGST method has a belter time-frequency resolution than that with S-transformation,and can ex... |
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| Keywords: | internal combustion (IC) engine cylinder head vibration AGST time-frequency resolution |
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