Quantitative nondestructive evaluation from ultrasonic waveforms using principal component fuzzy rules

Tetsuro Ogi, Takashi Mandai, Yasuhiro Yabe

研究成果: Article査読

抄録

Ultrasonic waveforms reflected by various kinds of defects were calculated by numerical analysis based on elastic wave theory. By using these calculated results as a knowledge base, the development of a nondestructive evaluation system which provides quantitative information, such as types, locations, sizes and shapes of the defects, is expected. In this study, a fuzzy reasoning method based on principal component analysis was proposed and a prototype system was developed. This method can be used to characterize waveforms using the principal components and to interpolate the wave data using the membership functions in the fuzzy rules. In addition, by adjusting the membership functions, the error which depends on the difference between the numerical analysis and the experiment can be absorbed. This method was applied to crack depth evaluation for perpendicular and inclined cracks. In each case, both the numerical analysis data and the experimental data were evaluated with high accuracy.

本文言語English
ページ(範囲)1112-1118
ページ数7
ジャーナルNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
63
609
DOI
出版ステータスPublished - 1997
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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