This paper is concerned with delayed H control for an offshore steel jacket platforms subject to external wave force. By artificially introducing a proper time-delay into control channel, a delayed H controller is designed to attenuate the wave-induced vibration of the offshore platform and thereby improve the control performance of the system. The problem of the controller design is transformed into a nonlinear minimization problem. It is shown through simulation results that compared with the delay-free H control scheme, the vibration amplitudes of the offshore steel jacket platform with the delayed H control scheme are in the same level as the ones with the delay-free H control scheme, while the required control force by the delayed H control scheme is much smaller than that by the delay-free H control scheme. Compared with the feedforward and feedback optimal control scheme, both the vibration amplitudes of the offshore platform and the required control force with the delayed H control scheme are smaller than the ones with the feedforward and feedback optimal control scheme.


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    Title :

    Active vibration H control of offshore steel jacket platforms using delayed feedback


    Contributors:

    Published in:

    Journal of Sound and Vibration ; 332 , 22 ; 5662-5677


    Publication date :

    2013


    Size :

    16 Seiten, 35 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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