| 基于HHT算法的波浪频率提取 |
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| 引用本文： | 李俊文,刘惠康,张孝春. 基于HHT算法的波浪频率提取[J]. 水电能源科学, 2015, 33(2): 93-96 |
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| 作者姓名： | 李俊文 刘惠康 张孝春 |
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| 作者单位： | 1. 武汉科技大学 信息科学与工程学院, 湖北 武汉 430081； 2. 武汉大学 土木建筑工程学院， 湖北 武汉 430072 |
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| 摘 要： | 海浪加速度信号属于非平稳非线性信号,且在测量时易受到各种方向上的噪音污染,为了实时获取海浪的频率信息,以海浪识别仪所测得的三轴加速度为数据分析对象,通过EMD分解将原始信号分解为多个IMF分量,然后利用设定阈值筛选出这些分量中的有效成分,并对有效IMF分量进行HHT变换,最后在试验平台以stm32作为控制器直接对数据进行处理,从而获得海浪的瞬时频率。结果表明,HHT算法可以准确地计算出瞬时频率。
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| 关 键 词： | 海浪 频率 加速度 HHT算法 |
Wave Frequency Extraction Based on HHT |
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| LI Jun-wen;LIU Hui-kang;ZHANG Xiao-chun. Wave Frequency Extraction Based on HHT[J]. International Journal Hydroelectric Energy, 2015, 33(2): 93-96 |
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| Authors: | LI Jun-wen LIU Hui-kang ZHANG Xiao-chun |
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| Affiliation: | LI Jun-wen;LIU Hui-kang;ZHANG Xiao-chun;School of Information Science and Engineering,Wuhan University of Science and Technology;School of Civil and Architectural Engineering,Wuhan University; |
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| Abstract: | The wave acceleration signal is non stationary nonlinear signal and it is vulnerable to the effect of noise in all directions when measured. In order to obtain real time wave frequency information, we designate triaxial acceleration data as analysis object which is measured by the wave identification device and EMD is used to decompose the original signal into several IMF components. Then we selecte the useful IMF components with a set threshold value and performed the HHT transform on them. Finally, the data are directly processed by the controller stm32 to get the instantaneous frequency on the experimental platform. It demonstrates that HHT algorithm can calculate the instantaneous frequency accurately. |
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| Keywords: | sea wave frequency acceleration HHT |
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