Conventional optimal control theories usually deal with optimal control force that involves only structural information. In order to control the excessive vibrations of offshore platforms more effectively, this paper presents a control strategy, which employs both information of the controlled system and external loading, namely feedforward-feedback (FF-FB) control strategy. FF-FB control strategy requires that the input signal be a process of white noise for obtaining the optimal control result. So, an analog filter is designed in this paper to approximately represent the random wave force by a process of white noise. In order to investigate the feasibility and effectiveness of the proposed method, a numerical example applied to an offshore platform is presented in this paper. The numerical results demonstrate that the proposed method offers advantage in performance over the control method employing only state feedback.
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ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
June 12–17, 2005
Halkidiki, Greece
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4195-2
PROCEEDINGS PAPER
Feedforward-Feedback Control of Offshore Platforms Excited by Random Wave
Chunyan Ji,
Chunyan Ji
Jiangsu University of Science and Technology, Zhenjiang, China
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Qingmin Meng
Qingmin Meng
Jiangsu University of Science and Technology, Zhenjiang, China
Search for other works by this author on:
Chunyan Ji
Jiangsu University of Science and Technology, Zhenjiang, China
Qingmin Meng
Jiangsu University of Science and Technology, Zhenjiang, China
Paper No:
OMAE2005-67246, pp. 543-547; 5 pages
Published Online:
November 11, 2008
Citation
Ji, C, & Meng, Q. "Feedforward-Feedback Control of Offshore Platforms Excited by Random Wave." Proceedings of the ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B. Halkidiki, Greece. June 12–17, 2005. pp. 543-547. ASME. https://doi.org/10.1115/OMAE2005-67246
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