This article investigates a model predictive control (MPC) with disturbance observer (DOB) for a trimaran longitudinal motion control. Firstly, to design the trimaran longitudinal motion stability controller, the mathematical model of the trimaran requires to be obtained. The hydrodynamic coefficients in the mathematical model are obtained by the computational fluid dynamics simulation. Secondly, a T-foil with the fixed attack angle is selected as an antipitching appendage. It is verified that the T-foil is effective in restraining the longitudinal motion of the trimaran through numerical simulation. Lastly, to enhance the ability of the T-foil for restraining the severe longitudinal motion, a controller based on the MPC method with DOB is designed to control the attack angle. The effect of the proposed algorithm is verified by theoretical analysis and simulation.

中文翻译：

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基于计算流体动力学和预测控制的高速三体船纵向运动控制

本文研究了用于三体船纵向运动控制的带有干扰观测器 (DOB) 的模型预测控制 (MPC)。首先，设计三体船纵向运动稳定控制器，需要得到三体船的数学模型。数学模型中的流体动力学系数是通过计算流体动力学模拟得到的。其次，选择具有固定攻角的 T 型翼作为抗俯仰附件。通过数值模拟验证了T型翼能有效抑制三体船的纵向运动。最后，为了增强T型翼抑制剧烈纵向运动的能力，设计了一种基于带有DOB的MPC方法的控制器来控制攻角。