| 流化床颗粒浓度信号的小波降噪分析 |
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| 引用本文： | 陈江涛,周旻昊,肖峰敏.流化床颗粒浓度信号的小波降噪分析[J].重庆工学院学报,2011(2). |
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| 作者姓名： | 陈江涛 周旻昊 肖峰敏 |
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| 作者单位： | 华北电力大学能源动力与机械工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50736002,No.61072005); 国家“863”计划资助项目(2007AA05Z331); 国家重点基础研究发展计划项目(2005CB422100); 长江学者和创新团队发展计划项目 |
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| 摘 要： | 用小波分析去除噪声的方法,对气-固循环流化床中两相流颗粒浓度的实验数据进行分析,揭示流化床中两相流的流动规律。气固循环流化床提升管的颗粒浓度和压力波动信号的去除噪结果表明,小波分析方法能有效去除颗粒浓度和压力波动信号中的大部分噪声,其消噪效果优于传统的傅里叶变换滤波方法,且小波分析去噪方法能更加有效地辨别真实信号与噪声信号。
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| 关 键 词： | 气固两相流 浓度信号 降噪 小波分析 模极大值 |
Analysis of Wavelet Reducing Noise for Grain Consistency Signal of Fluidized Bed |
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| CHEN Jiang-tao,ZHOU Min-hao,XIAO Feng-min.Analysis of Wavelet Reducing Noise for Grain Consistency Signal of Fluidized Bed[J].Journal of Chongqing Institute of Technology,2011(2). |
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| Authors: | CHEN Jiang-tao ZHOU Min-hao XIAO Feng-min |
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| Affiliation: | CHEN Jiang-tao,ZHOU Min-hao,XIAO Feng-min(Dept.,of Energy,Power and Mechanism Engineering,North China Electric Power University,Beijing 102206,China) |
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| Abstract: | In the paper,the behaviors of gas-solid circulating fluidized bed have been studied by wavelet package.The experimental analysis results show that the gas and solids phases local flow structure of CFB riser are composed of dilute phase and dense phase.The results indicate the method can efficiently differentiate the noises from the solids holdup signals.And the denoised effect is much better than that by filter method based on the Fourier transform.. |
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| Keywords: | gas-solid concentration signal denoiser wavelet analysis modulus maximum |
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