Motion performance of a semi-submersible platform based on model-free adaptive control

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (2) : 88-96.

YU Yang1,2，ZHANG Penghui1,2，CHENG Siyuan1,2，ZHANG Wenhao1,2，YU Jianxing1,2

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Abstract

The South China Sea is rich in oil and gas resources, and semi-submersible platform often face the major danger of mooring failure when working in this area. In this paper, a semi-submersible platform equipped with catenary mooring system and DP-3 dynamic positioning system is taken as the research object, and study the motion performance of semi-submersible platform before and after mooring failure by using the software AQWA. At the same time, drawing help from the secondary development function of the software AQWA, model-free adaptive control is used as the control theory of dynamic positioning system to study the motion performance recovery of semi-submersible platform after mooring failure. Numerical simulation results show that the semi-submersible platform using model-free adaptive control as the dynamic positioning system control theory can recover the motion performance well after mooring failure and reduce the harm caused by mooring failure effectively. Model-free adaptive control based on partial form dynamic linearization and full form dynamic linearization can recover the motion performance of semi-submersible platform faster than model-free adaptive control based on compact form dynamic linearization.

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semi-submersible platform / mooring failure / model-free adaptive control / dynamic positioning system / motion performance

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YU Yang1,2，ZHANG Penghui1,2，CHENG Siyuan1,2，ZHANG Wenhao1,2，YU Jianxing1,2. Motion performance of a semi-submersible platform based on model-free adaptive control[J]. Journal of Vibration and Shock, 2024, 43(2): 88-96

References

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