Date of Award

Summer 2007

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Computer Science

Committee Director

Chester E. Grosch

Committee Member

Alex Pothen

Committee Member

Mohammad Zubair

Abstract

Predicting sonar performance, critical to using any sonar to its maximum effectiveness, is computationally intensive and typically the results are based on data from the past and may not be applicable to the current water conditions. This paper discusses how Beowulf clustering techniques were investigated and applied to achieve real-time sonar performance prediction capabilities based on commercially off the shelf (COTS) hardware and software. A sonar system measures ambient noise in real-time. Based on the active sonar range scale, new ambient measurements can be available every 1 to 24 seconds. Traditional sonar performance prediction techniques operated serially and often took approximately 120 seconds of computing time per prediction. These predictions were outdated by potentially several sonar measurements. Using Beowulf clustering techniques, the same prediction now takes approximately 2 seconds. Analysis of measured data using a sonar hardware suite reveals that there is a set of sonar system parameters where a serial approach to sonar performance prediction is more efficient than Beowulf clustering. Using these parameters, a sonar engineer can make the best decision for system prediction capability based on the number of sonar beams and the expected operational range. The paper includes a discussion on the taxonomies of parallel computing, the historical developments leading to measuring the speed of light, and how those measurements enable acoustic paths to be computed in ocean environments.

DOI

10.25777/w2ry-5163

ISBN

9780549307402

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