국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	WAVELET FILTERING TO REDUCE CONSERVATISM IN AEROSERVOELASTIC ROBUST STABILITY MARGINS
저자	Marty Brenner and Rick Lind
Keyword	Aeroservoelasticity; Modal estimation; Robust stability; Uncertainty modeling; Wavelet analysis
URL	http://www.dfrc.nasa.gov/DTRS/1998/PDF/H-2222.pdf
보고서번호	NASA-TM-206545
발행년도	1998
출처	NASA Dryden Flight Research Center
ABSTRACT	Wavelet analysis for filtering and system identification was used to improve the estimation of aeroservoelastic stability margins. The conservatism of the robust stability margins was reduced with parametric and nonparametric time-frequency analysis of flight data in the model validation process. Nonparametric wavelet processing of data was used to reduce the effects of external desirableness and unmodeled dynamics. Parametric estimates of modal stability were also extracted using the wavelet transform. Computation of robust stability margins for stability boundary prediction depends on uncertainty descriptions derived from the data for model validation. F-18 High Alpha Research Vehicle aeroservoelastic flight test data demonstrated improved robust stability prediction by extension of the stability boundary beyond the flight regime.