| 采用改进的集总平均经验模态分解法的内燃机气门拍击激励与燃烧激励分离的研究 |
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| 引用本文： | 郑旭,郝志勇,金阳,卢兆刚.采用改进的集总平均经验模态分解法的内燃机气门拍击激励与燃烧激励分离的研究[J].汽车工程,2011,33(11). |
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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： | 浙江大学能源工程学系,杭州,310027 |
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| 基金项目： | 国家科技支撑项目(2011BAE22B05)资助 |
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| 摘 要： | 提出了一种改进的集总平均经验模态分解(M-EEMD)方法,并阐述了其基本原理。通过仿真试验,证实了M-EEMD不仅能够很好地解决经验模态分解(EMD)中模态混叠问题,而且能够抑制集总平均经验模态分解(EEMD)的噪声残余和模态分裂等问题。作为实例,对一个4缸4冲程内燃机气缸盖罩的振动信号进行M-EEMD分解,并对分解得到的IMF分量进行时频分析。结果表明M-EEMD能够成功地将内燃机气门拍击引起的机械激励成分与燃烧激励成分分离。
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| 关 键 词： | 内燃机 气门拍击 燃烧 激励分离 改进的集总平均经验模态分解 |
A Study on the Separation of Valve-slap Excitation and Combustion Excitation in IC Engine Using M-EEMD Method |
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| Zheng Xu,Hao Zhiyong,Jin Yang,Lu Zhaogang.A Study on the Separation of Valve-slap Excitation and Combustion Excitation in IC Engine Using M-EEMD Method[J].Automotive Engineering,2011,33(11). |
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| Authors: | Zheng Xu Hao Zhiyong Jin Yang Lu Zhaogang |
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| Institution: | Zheng Xu,Hao Zhiyong,Jin Yang & Lu Zhaogang Department of Energy Engineering,Zhejiang University,Hangzhou 310027 |
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| Abstract: | A modified ensemble empirical mode decomposition(M-EEMD) method is proposed with its basic principle expounded.Simulation tests demonstrate that the M-EEMD technique can not only tackle the mode mixing problem of the empirical mode decomposition(EMD) method,but also restrain the noise residue and mode splitting problem of the EEMD method.As an example,an M-EEMD decomposition is conducted on the vibration signals of cylinder heat cover in a four cylinder four-stroke engine,followed by a time-frequency analys... |
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| Keywords: | IC engine valve-slap combustion excitations separation M-EEMD |
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