基于小波变换去噪的多元统计投影分析及其在化工过程监控中的应用  

MSPA BASED ON PROCESS INFORMATION DENOISED WITH WAVELET TRANSFORM AND ITS APPLICATION TO CHEMICAL PROCESS MONITORING

作　　者：陈国金[1] 梁军[1] 钱积新[1] 

机构地区：[1]浙江大学系统工程研究所,浙江杭州310027

出　　处：《化工学报》2003年第10期1478-1481,共4页CIESC Journal

基　　金：国家高技术研究发展计划 (No 863 -5 11-92 0 -0 11;No 2 0 0 1AA4112 3 0 )资助项目~~

摘　　要：In industrial processes, measured data are often contaminated by noise, which causes poor performance of some techniques driven by data Wavelet transform is a useful tool to de noise the process information, but conventional transaction is directly employing wavelet transform to the measured variables, which will make the method less effective and more multifarious if there exists lots of process variables and collinear relationships In this paper, a novel multivariate statistical projection analysis (MSPA) based on data de noised with wavelet transform and blind signal analysis is presented, which can detect fault more quickly and improve the monitoring performance of the process The simulation results applying to a double effect evaporator verify higher effectiveness and better performance of the new MSPA than classical multivariate statistical process control(MSPC)In industrial processes, measured data are often contaminated by noise, which causes poor performance of some techniques driven by data. Wavelet transform is a useful tool to de-noise the process information, but conventional transaction is directly employing wavelet transform to the measured variables, which will make the method less effective and more multifarious if there exists lots of process variables and collinear relationships. A novel multivariate statistical projection analysis (MSPA) based on data de-noised with wavelet transform and blind signal analysis is presented, which can detect fault more quickly and improve the monitoring performance of the process. The simulation results applying to a double-effect evaporator verify higher effectiveness and better performance of the new MSPA than classical multivariate statistical process control (MSPC).

关 键 词：小波变换 盲源信号分析 多元统计投影分析 过程监控 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] O212.4[自动化与计算机技术—控制科学与工程]