Nonlinear optimization of autonomous undersea vehicle sampling strategies for oceanographic data-assimilation: Research Articles

  • Authors:
  • Kevin D. Heaney;Glen Gawarkiewicz;Timothy F. Duda;Pierre F. J. Lermusiaux

  • Affiliations:
  • Ocean Acoustical Services and Instrumentation Systems, Inc. 11006 Clara Barton Dr. Fairfax Station, Virginia 22039;Woods Hole Oceanographic Institution Woods Hole, Massachusetts 02543;Woods Hole Oceanographic Institution Woods Hole, Massachusetts 02543;Division of Engineering and Applied Sciences Harvard University Pierce Hall, 29 Oxford St. Cambridge, Massachusetts 02138

  • Venue:
  • Journal of Field Robotics - Special Issue on Underwater Robotics
  • Year:
  • 2007

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Abstract

The problem of how to optimally deploy a suite of sensors to estimate the oceanographic environment is addressed. An optimal way to estimate (nowcast) and predict (forecast) the ocean environment is to assimilate measurements from dynamic and uncertain regions into a dynamical ocean model. In order to determine the sensor deployment strategy that optimally samples the regions of uncertainty, a Genetic Algorithm (GA) approach is presented. The scalar cost function is defined as a weighted combination of a sensor suite's sampling of the ocean variability, ocean dynamics, transmission loss sensitivity, modeled temperature uncertainty (and others). The benefit of the GA approach is that the user can determine “optimal” via a weighting of constituent cost functions, which can include ocean dynamics, acoustics, cost, time, etc. A numerical example with three gliders, two powered AUVs, and three moorings is presented to illustrate the optimization approach in the complex shelfbreak region south of New England. © 2007 Wiley Periodicals, Inc.