지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.3
- 수록면
- 291 - 297 (7page)
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초록· 키워드
오류제보하기
Conventional Fourier analysis can give only limited information about the dynamic characteristics of nonstationary signals. Instead, time-frequency analysis is widely used to investigate the nonstationary signal in detail. Several time-frequency analysis methods are compared for a typical acoustic emission burst generated during the impact between a ferrite ceramic and aluminum plate. This AE burst is inherently nonstationary and random containing many frequency contents, which leads to severe interference between cross terms in bilinear convolution type distributions. The smoothing and reassignment processes can improve the readability and resolution of the results. Spectrogram and scalogram of the AE burst are obtained and compared to get the characteristics information. Renyi entropies are computed for various bilinear time-frequency transforms to evaluate the randomness. These bilinear transforms are reassigned by using the improved algorithm in discrete computation.
목차
등록된 정보가 없습니다.
참고문헌 (8)
참고문헌 신청
1. [학술지(정기간행물)] - Feng, Y. / 2009 / Normalized Wavelet Packets Quantifiers for Condition Monitoring / Mechanical Systems and Signal Processing 23 : 712 ~ 723
2. [학술지(정기간행물)] - Ebersbach, S. / 2008 / Expert System Development for Vibration Analysis in Machine Condition Monitoring / Expert Systems with Applications 34 : 291 ~ 299
3. [학술지(정기간행물)] - Peng, Z. K. / 2004 / Application of the Wavelet Transform in Machine Condition Monitoring and Fault Diagnostics: A Review with Bibliography / Mechanical Systems and Signal Processing 18 : 199 ~ 221
4. [학술대회논문] - Zhang, J. / 2003 / Wavelet Packet Feature Extraction for Vibration Monitoring and Fault Diagnosis of Turbo-generator / Proceedings of the Second International Conference on Machine Learning and Cybernetics : 76 ~ 80
6. [학술지(정기간행물)] - Jeong, T. G. / 2007 / Study on the Nonlinearity of the Nonstationary Impulse Signal Using Rea- ssigned Time-frequency Analysis / Lecture Notes in Computer Science 4706 (Part II) : 873 ~ 882
2. [학술지(정기간행물)] - Ebersbach, S. / 2008 / Expert System Development for Vibration Analysis in Machine Condition Monitoring / Expert Systems with Applications 34 : 291 ~ 299
3. [학술지(정기간행물)] - Peng, Z. K. / 2004 / Application of the Wavelet Transform in Machine Condition Monitoring and Fault Diagnostics: A Review with Bibliography / Mechanical Systems and Signal Processing 18 : 199 ~ 221
4. [학술대회논문] - Zhang, J. / 2003 / Wavelet Packet Feature Extraction for Vibration Monitoring and Fault Diagnosis of Turbo-generator / Proceedings of the Second International Conference on Machine Learning and Cybernetics : 76 ~ 80
6. [학술지(정기간행물)] - Jeong, T. G. / 2007 / Study on the Nonlinearity of the Nonstationary Impulse Signal Using Rea- ssigned Time-frequency Analysis / Lecture Notes in Computer Science 4706 (Part II) : 873 ~ 882
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