On active current selection for Lagrangian profilers

Jerome Jouffroy, Qiuyang Zhou, Oliver Zielinski

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    Abstrakt

    Autonomous Lagrangian profilers are now widely used as measurement and monitoring platforms, notably in observation programs as Argo. In a typical mode of operation, the profilers drift passively at their parking depth before making a vertical profile to go back to the surface. This paper presents simple and computationally-efficient control strategies to actively select and use ocean currents so that a profiler can autonomously reach a desired destination. After briefy presenting a typical profiler and possible mechanical modifications for a coastal environment, we introduce simple mathematical models for the profiler and the currents it will use. We then present simple feedback controllers that, using the direction of the currents and taking into account the configuration of the environment (coastal or deep-sea), is able to steer the profiler to any desired horizontal location. To illustrate the approach, a few results are presented using both simulated currents and real current velocity profiles from the North Sea.

    OriginalsprogEngelsk
    TidsskriftModeling, Identification and Control (Online)
    Vol/bind34
    Udgave nummer1
    Sider (fra-til)1-10
    Antal sider10
    ISSN0332-7353
    DOI
    StatusUdgivet - 2013

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