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Vibration Control of Flexible Marine Riser Systems With Input Saturation

机译:输入饱和的柔性船用立管系统的振动控制

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摘要

In this paper, boundary control is designed to suppress transverse vibration of a flexible marine riser with input saturation in the ocean environment. Two cases are investigated: 1) state feedback boundary control, and 2) output feedback boundary control. In order to compensate for the input saturation, we propose an auxiliary system. First, state feedback boundary control with an auxiliary system is proposed when the boundary states of the riser can be measured. Subsequently, output feedback boundary control is developed when there are unmeasurable system states. High-gain observers are employed to estimate those unmeasurable states. Based on Lyapunov's direct method, the proposed control ensures that the deflection of the riser is uniformly bounded in the presence of the ocean disturbances. By choosing a set of appropriate parameters, numerical simulations are provided to verify the effectiveness of the proposed boundary control.
机译:本文设计了边界控制来抑制海洋环境中输入饱和时柔性海洋立管的横向振动。研究了两种情况:1)状态反馈边界控制,以及2)输出反馈边界控制。为了补偿输入饱和,我们提出了一个辅助系统。首先,当可测量立管的边界状态时,建议使用辅助系统进行状态反馈边界控制。随后,当存在无法测量的系统状态时,将开发输出反馈边界控制。高收益观察员被用来估计那些无法测量的状态。基于李雅普诺夫的直接方法,所提出的控制确保了在存在海洋干扰的情况下,立管的挠度均匀地受到限制。通过选择一组适当的参数,提供了数值模拟,以验证所提出的边界控制的有效性。

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