论文部分内容阅读
该文研究线性前馈 -反馈控制策略对海洋平台振动控制的有效性。线性前馈 -反馈控制只有当输入荷载为白噪声过程时 ,所实施的控制才是最优的 ,因此该文采用一白噪声过程通过滤波器来近似随机波浪力谱 ,并将海洋平台 -主动控制系统的动力学方程转化为符合随机最优控制要求的增广状态空间表达形式。依据设计目标中对安全性以及经济性的权衡 ,通过使二次型控制目标函数最小化 ,推导出了随机最优控制力的计算方法 ,从而实现了最优控制的目的。在频率域上分析了海洋平台受控后的振动响应 ,结合典型的海洋天然气生产平台算例 ,将前馈 -反馈控制与反馈控制、TMD控制加以比较 ,总结了前馈 -反馈控制的特点及其优越性
This paper studies the effectiveness of the linear feedforward-feedback control strategy on the vibration control of offshore platforms. Linear feedforward - feedback control The control is implemented optimally only when the input load is white noise, so a white noise process is used to approximate the random wave power spectrum through a filter, and the Ocean Platform - Active The dynamic equations of the control system are transformed into augmented state space expressions in line with the stochastic optimal control requirements. According to the trade-off between safety and economy in the design objective, the objective function of the quadratic control is minimized, and the calculation method of the stochastic optimal control force is deduced to achieve the goal of optimal control. In the frequency domain, the vibration response of the marine platform under control is analyzed. Combining with the typical example of the offshore gas production platform, the feedforward-feedback control, feedback control and TMD control are compared and the characteristics of the feedforward-feedback control are summarized. Its superiority