An investigation of time efficiency in wavelet-based Markov parameter extraction methods
- Los Alamos National Lab., NM (United States). Engineering Sciences and Applications Div.
- Univ. of Colorado, Boulder, CO (United States). Center for Aerospace Structures
This paper investigates the time efficiency of using a wavelet transform-based method to extract the impulse response characteristics of a structural dynamic system. Traditional time domain procedures utilize the measured disturbances and response histories of a system to develop a set of auto and cross correlation functions. Through deconvolution of these functions, or matrix inversion, the Markov parameters of the system may be found. By transforming these functions into a wavelet basis, the size of the problem to be solved can be reduced as well as the computation time decreased. Fourier transforms are also used in this capacity as they may increase the time efficiency even more, but at the cost of accuracy. This paper will therefore compare the time requirements associated with a time, wavelet, and Fourier-based method of Markov parameter extraction, as well as their relative accuracy in modeling the system.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 663213
- Report Number(s):
- LA-UR-98-480; CONF-980419-; ON: DE98003465; TRN: AHC29818%%45
- Resource Relation:
- Conference: 39. AIAA/ASME/ASCE/ASH/ASC structures conference, Long Beach, CA (United States), 20-23 Apr 1998; Other Information: PBD: [1998]
- Country of Publication:
- United States
- Language:
- English
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