✦ LIBER ✦

ON THE USE OF ATTRACTOR DIMENSION AS A FEATURE IN STRUCTURAL HEALTH MONITORING

✍ Scribed by J.M. NICHOLS; L.N. VIRGIN; M.D. TODD; J.D. NICHOLS

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 373 KB
Volume: 17
Category: Article
ISSN: 0888-3270
DOI: 10.1006/mssp.2002.1521

No coin nor oath required. For personal study only.

✦ Synopsis

Recent works in the vibration-based structural health monitoring community have emphasised the use of correlation dimension as a discriminating statistic in seperating a damaged from undamaged response. This paper explores the utility of attractor dimension as a 'feature' and offers some comparisons between different metrics reflecting dimension. This focus is on evaluating the performance of two different measures of dimension as damage indicators in a structural health monitoring context. Results indicate that the correlation dimension is probably a poor choice of statistic for the purpose of signal discrimination. Other measures of dimension may be used for the same purposes with a higher degree of statistical reliability. The question of competing methodologies is placed in a hypothesis testing framework and answered with experimental data taken from a cantilivered beam.

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