| 基于小波变换的汽车振动信号去噪分析 |
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| 引用本文： | 姜永胜,王其东. 基于小波变换的汽车振动信号去噪分析[J]. 汽车科技, 2006, 0(4): 23-25 |
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| 作者姓名： | 姜永胜 王其东 |
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| 作者单位： | 合肥工业大学,机械与汽车工程学院,合肥,230009;安徽江淮汽车有限公司,合肥,230022;合肥工业大学,机械与汽车工程学院,合肥,230009 |
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| 摘 要： | 从小波变换的理论背景出发,介绍了利用小波变换对信号进行分解的原理。并针对汽车振动信号的非平稳性特点,对驾驶员座椅振动信号用dB4小波进行了多分辨分析和小波包分析,并运用Matlab中的WaveletToolbox对其进行去噪处理,取得了明显的效果。通过与Fourier去噪的比较,可以看出小波变换在汽车振动信号去噪中有着Fourier分析无可比拟的优点。
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| 关 键 词： | 汽车振动 多分辨分析 小波包分析 去噪 |
| 文章编号： | 1005-2550（2006）04-0023-03 |
| 收稿时间： | 2005-09-15 |
| 修稿时间： | 2005-09-15 |
De-noising Analysis of Automobile Vibration Signal Based on Wavelet Transform |
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| JIANG Yong-sheng,WANG Qi-dong. De-noising Analysis of Automobile Vibration Signal Based on Wavelet Transform[J]. Automobile Science and Technology, 2006, 0(4): 23-25 |
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| Authors: | JIANG Yong-sheng WANG Qi-dong |
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| Affiliation: | 1.Hefei University of Technology, Hefei 230009,China; 2.Anhui Jianghuai Automobile Co., Ltd., Hefei 230022,China |
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| Abstract: | the theory of decomposing the signal with wavelet transform is introduced based on the fundamental principle of wavelet transform.Aimed at the nonstationary character of automobile vibration signal,Multi-resolution Analysis and Wavelet Packet Analysis are adopted to analyze the vibration signal of driver seat with the dB4 wavelet.It has obtained obvious effect through the de-noising computation with the Wavelet Toolbox of Matlab.Compared with FFT de-noising,it shows that the wavelet transform has advantage over the Fourier Analysis. |
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| Keywords: | automobile vibration multi-resolution analysis wavelet packet analysis de-noising |
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