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A numerical optimization approach to acoustic hull array design.

Thomas A Wettergren1, John P Casey, Roy L Streit

  • 1Naval Undersea Warfare Center, 1176 Howell Street, Newport, Rhode Island 02841, USA.

The Journal of the Acoustical Society of America
|January 2, 2003
PubMed
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This study introduces a numerical optimization method to enhance passive broadband detection in hull arrays by adjusting shading weights. The approach rapidly finds optimal solutions, improving detection performance in low signal-to-noise ratio environments.

Area of Science:

  • Acoustics
  • Signal Processing
  • Numerical Optimization

Background:

  • Hull arrays are crucial for passive broadband detection.
  • Low signal-to-noise ratio (SNR) scenarios pose challenges for detection performance.
  • Conventional beamformers require optimization for specific noise environments.

Purpose of the Study:

  • To present a numerical optimization approach for enhancing passive broadband detection performance of hull arrays.
  • To optimize array shading weights without redesigning the beamformer.
  • To minimize the impact of known noise sources while maintaining array gain against unknown sources.

Main Methods:

  • A numerical optimization technique is developed for general hull arrays.
  • The method adjusts array shading weights to maximize the array's deflection coefficient.

Related Experiment Videos

  • The approach is demonstrated using hull-borne structural noise as a case study.

    • Main Results:

    • The optimization approach converges rapidly to optimal solutions.
    • Adjusting shading weights effectively maximizes the array's deflection coefficient.
    • The method successfully minimizes the impact of known noise sources.

    Conclusions:

    • The presented numerical optimization approach effectively enhances passive broadband detection in hull arrays.
    • This method offers a practical way to improve array performance by adjusting shading weights.
    • The design concept is adaptable to other array parameters like element position and material selection.