Accession Number:

AD0649032

Title:

A PROBLEM IN THE EXTRACTION OF EFFECTIVE SIGNAL IN THE PRESENCE OF HIGH-INTENSITY NOISE,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1966-12-20

Pagination or Media Count:

22.0

Abstract:

The proposed solution to the problem is automating the processing of gravimetric information by converting the continuous signals of gravimetric information into a digital code and using computers as digital filters. Some simple methods for processing gravimetric information obtained from observations with surface ships and airplanes are discussed and the parameters of digital filters are determined on the basis of the least mean square error as a criterion. Formulas are given for determining the correlation function of gravimetric recordings computed on a Ural-1 computer, and the parameters of the correlation functions for shipboard and aerial measurements of the force of gravity g are given in teo tables. The computations show that the dispersion of the vertical component of acceleration of the ship in high waves is on the same order as the dispersion of the same component for an airplane and when waves are quiet, two to three orders lower. Gravimeter recordings include noise whose frequency is in the 0.3-1.18 and 0.04-2.1 radsec ranges for observations from surface ships and airplanes, respectively. The principal energy is concentrated near the fundamental frequencies of the base, which average about 1.1 radsec for fundamental ship vibrations and 10-14 times higher than the fundamental frequency of an airplane-autopilot system about 0.09 radsec. Author

Subject Categories:

  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE