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Robust sampled-data \({\varvec{H}}_{\varvec{\infty }}\) control for offshore platforms subject to irregular wave forces and actuator saturation

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Abstract

This paper presents a robust sampled-data \({H_\infty }\) control scheme for vibration attenuation of offshore platforms subject to irregular wave forces and actuator saturation. When a digital computer is used to sample and quantize the measurement signal, a discrete-time control input signal will be produced. At the same time, the actuator is usually saturated due to the physical or technological constraints. In view of these, a sampled-data \({H_\infty }\) controller is designed to attenuate the wave-induced vibration of the offshore platform, thereby improving the control performance of the system. It is shown through simulation results that the proposed control scheme is effective to suppress the vibration of the offshore platform in the presence of actuator saturation.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant No. 61273120, and the Postgraduate Innovation Project of Jiangsu Province (Grant No. KYLX-0372).

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Authors and Affiliations

  1. School of Automation, Nanjing University of Science and Technology, Nanjing, 210094, People’s Republic of China

    Shipei Huang, Mingjie Cai & Zhengrong Xiang

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  1. Shipei Huang
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  2. Mingjie Cai
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  3. Zhengrong Xiang
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Correspondence to Zhengrong Xiang.

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Huang, S., Cai, M. & Xiang, Z. Robust sampled-data \({\varvec{H}}_{\varvec{\infty }}\) control for offshore platforms subject to irregular wave forces and actuator saturation. Nonlinear Dyn 88, 2705–2721 (2017). https://doi.org/10.1007/s11071-017-3404-6

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