국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	NONSTATIONARY DYNAMICS DATA ANALYSIS WITH WAVELET-SVD FILTERING
저자	Marty Brenner and Dale Groutage
Keyword	Aeroelasticity; Aeroservoelasticity; Singular value decomposition; System identification; Time-frequency analysis; Wavelet analysis
URL	http://www.dfrc.nasa.gov/DTRS/2001/PDF/H-2445.pdf
보고서번호	NASA-TM-2001-210391
발행년도	2001
출처	NASA Dryden Flight Research Center
ABSTRACT	Nonstationary time-frequency analysis is used for identification and classification of aeroelastic and aeroservoelastic dynamics. Time-frequency multiscale wavelet processing generates discrete energy density distributions. The distributions are processed using the singular value decomposition (SVD). Discrete density functions derived from the SVD generate moments that detect the principal features in the data. The SVD standard basis vectors are applied and then compared with a transformed-SVD, or TSVD, which reduces the number of features into more compact energy density concentrations. Finally, from the feature extraction, wavelet-based modal parameter estimation is applied.