Covariance-invariant digital filtering—A better digital processing technique for ground motion studies

Autor:	J. E. Ehrenberg, E. N. Hernandez
Rok vydání:	1981
Předmět:	Ground motion Geophysics Geochemistry and Petrology Computer science Electronic engineering Bilinear interpolation Natural frequency Covariance Invariant (mathematics) Response spectrum Algorithm Digital filter Spectral line
Zdroj:	Bulletin of the Seismological Society of America. 71:1361-1367
ISSN:	1943-3573 0037-1106
DOI:	10.1785/bssa0710041361
Popis:	This paper describes a new recursive digital algorithm for computing the response spectrum from acceleration data. The algorithm digitally implements a single degree of freedom oscillator using a covariance-invariant digital filter. It is shown that this technique will produce an accurate response spectrum from input data that have been sampled at a rate that is as low as three times the oscillator natural frequency, fn. The more common response spectrum digital filter obtained using a bilinear z transformation technique requires a sampling rate of ten times fn. The fact that the algorithm can be used for data with a low sampling rate makes it particularly well suited for real time, multi-frequency calculation of response spectra with a microprocessor system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bdabb5c12b0e7ed9120eceb7138cf319 https://doi.org/10.1785/bssa0710041361 Zobrazit plný text záznamu