Jorge Cortés
Professor
Cymer Corporation Endowed Chair
Robust estimation and aggregation of ocean internal
wave parameters using Lagrangian drifters
M. Ouimet, J. Cortés
Proceedings of the American Control Conference, Portland,
Oregon, USA, 2014, pp. 5121-5126
Abstract
This paper considers a group of drogues whose objective is to
estimate the physical parameters that determine the dynamics of
ocean nonlinear internal waves. While underwater, individual
drogues do not have access to absolute position information and only
rely on inter-drogue measurements. Building on this data and the
structure of the drogue dynamics under the flow induced by an
internal wave, this paper improves in three different ways upon our
previous strategy, termed Parameter Determination Strategy, which
determines all wave parameters. The first is by showing that with
sufficiently fast sampling, the extended algorithm determines the
wave parameters. The second is by showing its applicability to
situations where two internal waves are present simultaneously. With
the extended algorithm, multiple estimates are calculated for each
parameter. Thus, with the presence of noisy measurements, the third
contribution is a method to aggregate parameter estimates to reduce
the error. Simulations illustrate the algorithm performance under
noisy measurements, the effect that the initial drogue locations has
on robustness, and the effectiveness of parameter aggregation.
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Mechanical and Aerospace Engineering,
University of California, San Diego
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cortes at ucsd.edu
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