Feedback and Feedforward Optimal Control for Offshore Jacket Platforms
Feedback and Feedforward Optimal Control for Offshore Jacket Platforms
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发表时间：
2004
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通讯作者：
Tang Gong-you
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作者：
Tang Gong-you
研究了受外部谐波干扰影响的线性系统的最优控制问题，并将其应用于海洋钢导管架平台的振动控制系统。波浪诱导力是海洋结构物所受的主要载荷，可视为系统的简谐激励。采用线性化的Morison方程来估算波浪荷载。主要结果涉及可实现的最优调节器的存在和设计，提出了以最优方式抑制强迫振荡的最优调节器。为了验证控制方案的有效性，对平台在不同波浪状态下的性能进行了研究。仿真基于调谐质量阻尼器和主动质量阻尼器控制装置。结果表明，该控制方案对减小导管架式海洋平台的位移响应是有效的。
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.