Robust mixed \[H_2 /H_\infty \] active control for offshore steel jacket platform
This paper presents a robust mixed \[H_2 /H_\infty \] control method for wave-excited offshore jacket platforms. Its objective was to design a controller that minimizes the upper bound of the \[H_2 \] performance measure on platform dynamics satisfying some \[H_\infty \] norm bound constraint simult...
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Published in | Nonlinear dynamics Vol. 78; no. 2; pp. 1503 - 1514 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Nature B.V
01.10.2014
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Subjects | |
Online Access | Get full text |
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Summary: | This paper presents a robust mixed \[H_2 /H_\infty \] control method for wave-excited offshore jacket platforms. Its objective was to design a controller that minimizes the upper bound of the \[H_2 \] performance measure on platform dynamics satisfying some \[H_\infty \] norm bound constraint simultaneously. Based on mixed \[H_2 /H_\infty \] control theory and linear matrix inequality techniques, a novel approach to stabilize offshore platform vibration with constrained \[H_2 /H_\infty \] performances is proposed. Uncertainties of the wave excitation are considered in dynamic performance analysis of offshore platforms. A reduced mode offshore platform structure under wave excitation is analyzed, and simulations are used to verify the effectiveness of the proposed approach. Compared with existing \[H_\infty \] control methods, the proposed approach makes a significant improvement for dynamic performances of offshore platforms under random wave excitation. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0924-090X 1573-269X |
DOI: | 10.1007/s11071-014-1531-x |