Single Mode Excitation in the Shallow Water Acoustic Channel Using Feedback Control.

Abstract

The shallow water acoustic channel supports far-field propagation in a discrete set of modes. Ocean experiments have confirmed the modal nature of acoustic propagation, but no experiment has successfully excited only one of the suite of mid-frequency propagating modes propagating in a coastal environment. The ability to excite a single mode would be a powerful tool for investigating shallow water ocean processes. A feedback control algorithm incorporating elements of adaptive estimation, underwater acoustics, array processing and control theory to generate a high-fidelity single mode is presented. This approach also yields a cohesive framework for evaluating the feasibility of generating a single mode with given array geometries, noise characteristics and source power limitations. Simulations and laboratory waveguide experiments indicate the proposed algorithm holds promise for ocean experiments.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1996
Accession Number
ADA323815

Entities

People

  • John R. Buck

Organizations

  • Woods Hole Oceanographic Institution

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Computational Fluid Dynamics
  • Computational Science
  • Control Systems
  • Data Science
  • Digital Signal Processing
  • Electrical Engineering
  • Information Science
  • Measurement
  • Oceanography
  • Random Variables
  • Signal Processing
  • Statistical Algorithms
  • Telemetry

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Computational Fluid Dynamics (CFD)
  • Optical Physics and Photonics.