气固流化床压力脉动信号的相关结构模型与分析

CIESC Journal

气固流化床压力脉动信号的相关结构模型与分析

黄海,黄轶伦,张卫东

浙江大学仪器工程系,浙江大学仪器工程系,浙江大学仪器工程系杭州310027,杭州310027,杭州310027

出版日期:1999-12-25 发布日期:1999-12-25

MODELING AND ANALYSIS OF PRESSURE FLUCTUATIONS IN A GAS - SOLIDS FLUIDIZED BED

Huang Hai, Huang Yilun and Zhang Weidong(Department of Instrumentation Engineering , Zhejiang University, Hangzhou 310027)

Online:1999-12-25 Published:1999-12-25

摘要/Abstract

摘要： 建立了气固流化床压力脉动信号的相关结构模型。基于小波变换确定了模型中的自相似参数H和白噪声强度σ_w~2,从而确证该压力脉动信号可以分解成分形布朗运动和白噪声的叠加,并定量计算出压力脉动信号中白噪声所占的百分比,在此基础上,研究了模型参数在不同操作条件下的变化规律,并给出物理解释。

Abstract: In this paper, the correlation structure model of pressure fluctuations in a gas - solid fluidized bed is established. The self- similar parameter H and the intensity parameter σw of Gaussian white noise in the model are determined by the help with wavelet transform. Consequently, it is proved that the pressure fluctuations can be decomposed into the addition of Fractal Brownian Motion (FBM) and Gaussian White Noise (GWN), and the content proportion of the GWN in the signal is figured out. Finally, the changes of H and σw in different operating conditions are studied and physical interpretation is given.

中图分类号:

TP14

黄海,黄轶伦,张卫东. 气固流化床压力脉动信号的相关结构模型与分析 [J]. CIESC Journal.

Huang Hai, Huang Yilun and Zhang Weidong(Department of Instrumentation Engineering , Zhejiang University, Hangzhou 310027). MODELING AND ANALYSIS OF PRESSURE FLUCTUATIONS IN A GAS - SOLIDS FLUIDIZED BED[J]. .