Theoretical Development for Low Distortion Broadbanding of Seismic Data

Abstract

The report presents the results of a theoretical study of non- linearities in seismometers. The effects of non-linear elements in the mechanical and electrical parts of the seismometer system were modeled and investigated with particular attention to the transfer of noise power between different regions of the seismic noise spectrum. The seismometer was modeled as a simple second order mechanical system followed by a transducer and an electronic amplifier. The qualitative effects of non-linearities in each of these elements were investigated. A numerical simulation demonstrated the quantitative effects of various non-linearities on the signal-to-noise ratio observed in the low-noise region of the seismic spectrum. Small non-linearities were shown to cause serious loss of signal-to-noise ratio.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
AD0777183

Entities

People

  • Edgar F. Romberg
  • John M. Davies

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Distortion
  • Electronic Amplifier
  • Equations
  • Feedback
  • Frequency
  • Frequency Bands
  • Frequency Response
  • Linear Systems
  • Linearity
  • Low Noise
  • Noise
  • Numerical Analysis
  • Power Spectra
  • Resonant Frequency
  • Simulations
  • Spectra

Readers

  • Control Systems Engineering.
  • Microwave Engineering.
  • Seismology

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems