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    Boundary control of coupled nonlinear three dimensional marine risers

    Access Status
    Fulltext not available
    Authors
    Nguyen, T.
    Do, Khac Duc
    Pan, J.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Nguyen, T.L. and Do, K.D. and Pan, Ji. 2013. Boundary control of coupled nonlinear three dimensional marine risers. Journal of Marine Science and Application. 12 (1): pp. 72-88.
    Source Title
    Journal of Marine Science and Application
    DOI
    10.1007/s11804-013-1175-8
    ISSN
    1671-9433
    URI
    http://hdl.handle.net/20.500.11937/21705
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a design of boundary controllers implemented at the top end for global stabilization of a marine riser in a three dimensional space under environmental loadings. Based on the energy approach, nonlinear partial differential equations of motion, including bending-bending and longitudinal-bending couplings for the risers are derived. The couplings cause mutual effects between the three independent directions in the riser's motions, and make it difficult to minimize its vibrations. The Lyapunov direct method is employed to design the boundary controller. It is shown that the proposed boundary controllers can effectively reduce the riser's vibration. Stability analysis of the closed-loop system is performed using the Lyapunov direct method. Numerical simulations illustrate the results.

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