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    Single mode excitation in the shallow water acoustic channel using feedback control

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    Buck_Thesis (24.40Mb)
    Date
    1996-06
    Author
    Buck, John R.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5454
    DOI
    10.1575/1912/5454
    Keyword
     Underwater acoustics; Feedback control systems 
    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.
    Description
    Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 1996
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Theses
    Suggested Citation
    Thesis: Buck, John R., "Single mode excitation in the shallow water acoustic channel using feedback control", 1996-06, DOI:10.1575/1912/5454, https://hdl.handle.net/1912/5454
     

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