Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (8): 32-38,62.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Modeling and Boundary Control of a Marine Riser

Wu Xin-sheng  Li Lin-ye  Liu Yu  Gao Hong-xia   

  1. School of Automation Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-04-05 Revised:2012-06-11 Online:2012-08-25 Published:2012-07-01
  • Contact: 刘屿(1977-) ，男，博士，助理研究员，主要从事分布参数系统控制研究． E-mail:auylau@scut.edu.cn E-mail:auxswu@ scut.edu.cn
  • About author:吴忻生(1961-) ，男，副教授，主要从事智能控制及自动化技术应用研究．
  • Supported by:

    国家自然科学基金资助项目( 61203060) ; 广东省自然科学基金资助项目( S2011040005707) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( 2011ZZ0020) ; 广东省安全生产专项资金资助项目( 2010-95)

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Abstract:

In order to accurately describe the dynamic characteristics of marine risers,a marine riser model coupling time-varying internal flow and ocean current dynamics is proposed based on Hamilton principle. This model is described with a set of partial differential equations ( PDEs) and a set of ordinary differential equations,and it is infinite-dimensional. Then,based on the proposed model,the boundary controllers in the longitudinal and lateral directions are designed to reduce riser vibrations,respectively by means of the boundary control technique and the Lyapunov method. Consequently,the stability and uniform boundness of the riser system are proved via Lyapunov method. Finally,the effectiveness of the proposed model is verified by simulated experiments.

Key words: marine riser, boundary control, Hamilton principle, Lyapunov method, time-varying internal flow