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Feedback and Feedforward Optimal Control for Offshore Jacket Platforms
作者姓名:王薇  唐功友
作者单位:CollegeofInformationScienceandEngineering,OceanUniversityofChina,Qingdao266071,China
基金项目:ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .6 0 0 74 0 0 1)andtheNaturalScienceFoundationofShandongProvince (GrantNo .Y2 0 0 0G0 2 )
摘    要:The optimal control is investigated for linear systems affected by external harmonic disturbance and applied to vibration control systems of offshore steel jacket platforms. The wave-induced force is the dominant load that offshore structures are subjected to, and it can be taken as harmonic excitation for the system. The iineafized Morison equation is employed to estimate the wave loading. The main result concerns the existence and design of a realizable optimal regulator, which is proposed to damp the forced oscillation in an optimal fashion. For demonstration of the effectiveness of the control scheme, the platform performance is investigated for different wave states. The simulations axe based on the tuned mass damper (TMD) and the active mass damper (AMD) control devices. It is demonstrated that the control scheme is useful in reducing the displacement response of jacket-type offshore platforms.

关 键 词:反馈前馈控制器  波载  优化控制  线性谐波  海上平台  TMD

Feedback and Feedforward Optimal Control for Offshore Jacket Platforms
WANG Wei and TANG Gong-you College of Information Science and Engineering,Ocean University of China,Qingdao ,China.Feedback and Feedforward Optimal Control for Offshore Jacket Platforms[J].China Ocean Engineering,2004,18(4):515-526.
Authors:WANG Wei and TANG Gong-you College of Information Science and Engineering  Ocean University of China  Qingdao  China
Institution:WANG Wei and TANG Gong-you 1 College of Information Science and Engineering,Ocean University of China,Qingdao 266071,China
Abstract:The optimal control is investigated for linear systems affected by external harmonic disturbance and applied to vibration control systems of offshore steel jacket platforms. The wave-induced force is the dominant load that offshore structures are subjected to, and it can be taken as harmonic excitation for the system. The linearized Morison equation is employed to estimate the wave loading. The main result concerns the existence and design of a realizable optimal regulator, which is proposed to damp the forced oscillation in an optimal fashion. For demonstration of the effectiveness of the control scheme, the platform performance is investigated for different wave states. The simulations are based on the tuned mass damper and the active mass damper control devices. It is demonstrated that the control scheme is useful in reducing the displacement response of jacket-type offshore platforms.
Keywords:feedback and feedforward controller  offshore platforms  wave loading  sinusoidal disturbances
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