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| 基于小波变换的气固流化床压力流动信号的分析 | |
| 引用本文： | 冀海峰 黄志尧. 基于小波变换的气固流化床压力流动信号的分析[J]. 高校化学工程学报, 2000, 14(6): 553-557 |
| 作者姓名： | 冀海峰 黄志尧 |
| 作者单位： | 浙江大学控制系工业控制技术国家重点实验室,浙江杭州 |
| 基金项目： | 国家自然科学基金，29676026， |
| 摘 要： | 将小波分析技术应用于气固流化床压力波动信号的分析中，在不同尺度上提取信号能量特征，由此来对压力波动信号中所含丰富信息进行分析、提出了应用小波分析技术来判别流化床从固定床向鼓泡床转变的新方法，并确定了起始流化速度的范围，初步研究表明，所提取的特征信息反应了气固流化床从固定床向鼓泡床转变的过程，通过此特征信息可以确定流化床的起始流化速度的范围。／ |
| 关 键 词： | 气固流化床 小波变换 压力波动 信号分析 |
| 文章编号： | 1003-9015(2000)06-0558-05 |
| 修稿时间： | 1999-09-20 |
Study on the Lyapunov Exponents Spectrum of Pressure Fluctuation in Gas-Solid Fluidized Bed |
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| ZHAO Gui-bing,SHI Yan-fu. Study on the Lyapunov Exponents Spectrum of Pressure Fluctuation in Gas-Solid Fluidized Bed[J]. Journal of Chemical Engineering of Chinese Universities, 2000, 14(6): 553-557 | |
| Authors: | ZHAO Gui-bing SHI Yan-fu |
| Affiliation: | ZHAO Gui-bing1,SHI Yan-fu2 |
| Abstract: | Chaotic Lyapunov exponents spectrum was used to analyze the dynamic behavior of gas-solid fluidized bed with 0.09m in diameter and 1m in height. A software was exploited for computing spectrum of Lyapunov exponents in chaotic dynamic system. The dynamic behavior of pressure fluctuation in gas-solid fluidized bed was analyzed by this software. The research showed that dynamic behavior at different gas velocity could be embodied very well from spectrum of Lyapunov exponents. It was confirmed that in gas-solid fluidized bed system the relationship between correlation dimension and spectrum of Lyapunov exponents meets Kaplan-Yorke conjecture. It was verified too that the dynamic character of gas-solid fluidized bed was of dissipative structure. |
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