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刘松 蔡国平 董兴建. 海洋平台的时域低阶建模与主动控制研究[J]. 力学学报, 2011, 43(4): 737-745. DOI: 10.6052/0459-1879-2011-4-lxxb2010-373
引用本文: 刘松 蔡国平 董兴建. 海洋平台的时域低阶建模与主动控制研究[J]. 力学学报, 2011, 43(4): 737-745. DOI: 10.6052/0459-1879-2011-4-lxxb2010-373
Liu Song Cai Guoping Dong Xingjian. Time-domain dynamic modeling and active control of offshore platform[J]. Chinese Journal of Theoretical and Applied Mechanics, 2011, 43(4): 737-745. DOI: 10.6052/0459-1879-2011-4-lxxb2010-373
Citation: Liu Song Cai Guoping Dong Xingjian. Time-domain dynamic modeling and active control of offshore platform[J]. Chinese Journal of Theoretical and Applied Mechanics, 2011, 43(4): 737-745. DOI: 10.6052/0459-1879-2011-4-lxxb2010-373

海洋平台的时域低阶建模与主动控制研究

Time-domain dynamic modeling and active control of offshore platform

  • 摘要: 以海洋平台为对象, 开展时域低阶建模与主动控制的研究. 首先采用OKID(observer/Kalman filter identification)辨识方法, 根据系统的输入和输出时间历程数据计算出系统的Markov参数, 然后采用特征系统实现方法(eigensystemrealization algorithm, ERA)建立起一个阶数较低的系统状态空间模型, 随后基于该低阶模型采用LQG (linear quadratic Gaussian)控制方法进行控制律的设计, 最后将该控制律引入到系统的有限元模型中进行反馈闭环控制, 验证控制律的有效性. 数值仿真结果显示, 所给方法是有效和可行的.

     

    Abstract: This paper presents the studies on low-order time-domaindynamic modeling and active control of an offshore platform. Firstly, basedon the input-output data of the system, the method of Observer/Kalman filteridentification (OKID) is used to identify the Markov parameters of thesystem. Then a low-dimensional state-space model of the system isestablished by using the eigensystem realization algorithm (ERA). The LinearQuadratic Gaussian (LQG) controller is designed based on the low-dimensionalstate-space model. Finally, the controller designed is introduced into thefinite element model of the system to verify the effectiveness of thecontroller. Numerical results indicate the effectiveness and feasibility ofthe studies in this paper.

     

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