Regular Papers

International Journal of Control, Automation and Systems 2019; 17(1): 107-116

Published online January 3, 2019

https://doi.org/10.1007/s12555-018-0110-1

© The International Journal of Control, Automation, and Systems

Vibration Reduction for Offshore Platforms via Delayed Sliding Mode H∞ Control

Bao-Lin Zhang*, Xiefu Jiang, QiuxuanWu, and Gong-You Tang

China Jiliang University

Abstract

This paper deals with delayed sliding mode H∞ control for an offshore steel jacket platform subject to nonlinear self-excited wave force and external disturbance. By using both current and delayed states, a delayed sliding mode H∞ controller is designed to attenuate vibration of the offshore platform. It is observed through simulation results that the delayed sliding mode H∞ controller is capable of reducing the oscillation amplitudes of the offshore platform significantly. Moreover, compared with the delay-free sliding mode H∞ controller, the oscillation amplitudes of the offshore platform under the controllers are almost the same, while the control force required by the delayed sliding mode H∞ controller is less than that by the delay-free sliding mode H∞ controller."

Keywords Delayed feedback, H∞ control, offshore structure, sliding mode control, time-delay.

Article

Regular Papers

International Journal of Control, Automation and Systems 2019; 17(1): 107-116

Published online January 1, 2019 https://doi.org/10.1007/s12555-018-0110-1

Copyright © The International Journal of Control, Automation, and Systems.

Vibration Reduction for Offshore Platforms via Delayed Sliding Mode H∞ Control

Bao-Lin Zhang*, Xiefu Jiang, QiuxuanWu, and Gong-You Tang

China Jiliang University

Abstract

This paper deals with delayed sliding mode H∞ control for an offshore steel jacket platform subject to nonlinear self-excited wave force and external disturbance. By using both current and delayed states, a delayed sliding mode H∞ controller is designed to attenuate vibration of the offshore platform. It is observed through simulation results that the delayed sliding mode H∞ controller is capable of reducing the oscillation amplitudes of the offshore platform significantly. Moreover, compared with the delay-free sliding mode H∞ controller, the oscillation amplitudes of the offshore platform under the controllers are almost the same, while the control force required by the delayed sliding mode H∞ controller is less than that by the delay-free sliding mode H∞ controller."

Keywords: Delayed feedback, H∞ control, offshore structure, sliding mode control, time-delay.

IJCAS
June 2024

Vol. 22, No. 6, pp. 1761~2054

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