{"title":"Analysis of ion and X-ray time series measurements of electron beam welding for development of online monitoring","authors":"Choong Sup Yuon, Bong Jo Hyu","doi":"10.1109/MFI.1999.815993","DOIUrl":null,"url":null,"abstract":"Time series analysis results show the singular value decomposition is a candidate of online monitoring of welding penetration in a case that the covariance matrix of a full penetration is used as a mapping function. The mapped time series lie on a hyper-ellipsoid in which the lengths of semi-axes are the squared eigenvalues of the covariance matrix. Furthermore, this algorithm is fast compared with others since only the multiplication with the covariance matrix is used. A depth of welding is closely related with the volume of hyper-ellipsoid.","PeriodicalId":148154,"journal":{"name":"Proceedings. 1999 IEEE/SICE/RSJ. International Conference on Multisensor Fusion and Integration for Intelligent Systems. MFI'99 (Cat. No.99TH8480)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings. 1999 IEEE/SICE/RSJ. International Conference on Multisensor Fusion and Integration for Intelligent Systems. MFI'99 (Cat. No.99TH8480)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MFI.1999.815993","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Time series analysis results show the singular value decomposition is a candidate of online monitoring of welding penetration in a case that the covariance matrix of a full penetration is used as a mapping function. The mapped time series lie on a hyper-ellipsoid in which the lengths of semi-axes are the squared eigenvalues of the covariance matrix. Furthermore, this algorithm is fast compared with others since only the multiplication with the covariance matrix is used. A depth of welding is closely related with the volume of hyper-ellipsoid.