Accession Number : AD0723536

Title :   Comparison of Methods Used for Shock and Fourier Spectra Computations,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Reed,Robert S. , Jr

Report Date : 24 NOV 1970

Pagination or Media Count : 158

Abstract : Analog and digital techniques used in the computation of the shock and Fourier spectra are presented and compared on the bases of speed, accuracy and ease of usage. Analog computers with active and passive elements are considered, and it is concluded that active RC networks make accurate and simple-to-use computers for the analog determination of spectra. The digital techniques studied included the impulse-invariant Fast Fourier transform, z-transform, and the O'Hara method which uses a parabolic interpolation formula. (Author)

Descriptors :   (*FOURIER ANALYSIS, SPECTRUM ANALYZERS), (*SHOCK WAVES, SPECTRUM ANALYZERS), VIBRATORS(MECHANICAL), ELECTRICAL NETWORKS, TRANSIENTS, OSCILLATION, INTEGRAL TRANSFORMS, NUMERICAL ANALYSIS, SUBROUTINES, ANALOG COMPUTERS, THESES

Subject Categories : Numerical Mathematics
      Computer Programming and Software
      Computer Hardware
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE