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Boundary control of coupled nonlinear three dimensional marine risers

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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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Correspondence to T. L. Nguyen.

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Tung Lam Nguyen received his B.S. degree in Electrical Engineering from Hanoi University of Science and Technology, Vietnam, in 2005. He received his M.S. degree in 2007 from Asian Institute of Technology, Thailand and is currently a Ph.D. Candidate in the School of Mechanical and Chemical Engineering at the University of Western Australia. His research interests are in the areas of nonlinear control, flexible sytems.

Khac Duc Do received M.E. and Ph.D. degrees (with Distinction) in mechanical engineering from The University of Wollongong, Wollongong, Australia, and The University of Western Australia, Crawley, Australia, in 1999 and 2003, respectively. Before 2012, he was a research professor with the School of Mechanical Engineering, The University of Western Australia. He is currently with the Department of Mechanical Engineering, Curtin University of Technology. His research interests include control of nonlinear systems, control of multiple agents, control of land, air, and ocean vehicles, and control of systems governed by partial differential equations.

Jie Pan obtained a BSc in physics and acoustics from Nanjing University in China. He completed his PhD on sound and structural interaction at Adelaide University under the supervision of David Bies and his postdoctoral work on active noise and vibration under Colin Hansen. He joined the University of Western Australia in 1991 and he is now the Winthrop professor in the School of Mechanical and Chemical Engineering and director of Center for Acoustics, Dynamics and Vibration of UWA. He has authored and co-authored more than 300 journals and conference papers, one book and an eBook based on his research in acoustics and control. His H-index is 28, i10-index is 95. Professor Pan also contributed to WA ship building, mining and power industries through his consulting activities. Jie has several patents and a couple of them have been successfully implemented in WA marine, mining and power industries.

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Nguyen, T.L., Do, K.D. & Pan, J. Boundary control of coupled nonlinear three dimensional marine risers. J. Marine. Sci. Appl. 12, 72–88 (2013). https://doi.org/10.1007/s11804-013-1175-8

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