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Wave and 3-D Motion of Vessel Measurement by GPS

机译：GPS测量船只的波和3D运动

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General problems caused by a gravity wave,which has wave period from 0.1 to 10 seconds,have been solved already in civil engineering field.However,several problems such as mooring line strength and cargo handling work occurred by long period gravity wave,which has wave period from some tens seconds to some tens minutes,are still remained especially in a harbor that has mooring and anchoring vessels.In order to figure out various problems induced by the long period gravity wave and to reveal the characteristics of it,the wave measurement system arrayed buoy equipped with kinematic GPS (K-GPS) is proposed and the conventional wave direction estimation method of Water Particle Measurement Method is described.Also,three K-GPS antennas and IMU (Inertia Measurement Unit) are installed on a vessel to reveal the oscillation characteristics of mooring vessel by the swell.In this paper,three experiments were carried out.Firstly,arrayed GPS buoy system was placed inside and outside of port to observe the propagating wave direction,and several results of wave direction estimation were shown.Finally,three K-GPS antennas and IMU were installed on a ferry and its oscillation of roll,pitch and yaw motions were observed and compared with the results of IMU.Also,other three horizontal motions of sway,surge and heave were shown by K-GPS.From the results of this experiment,the wave of 0.083 Hz having 12 seconds and 0.087 Hz having 11.5 seconds wave period were observed inside and outside harbor by GPS buoys.In addition,from the comparison results of the mooring vessel oscillation,each motion of roll,pitch and yaw by K-GPS showed good results of ±1.8 degrees difference with maximum compared to IMU.Other three horizontal motions of sway,surge and heave by K-GPS were shown also.
机译：重力波引起的一般问题，其波周期为0.1至10秒，已经在土木工程领域中得到解决。但是，长时间的重力波引起了系泊缆强度和货物装卸工作等若干问题。波动测量系统，从几十秒到几十分钟的时间，尤其是在有系泊和锚泊船的港口中，仍然得以保留。为找出长期重力波引起的各种问题并揭示其特性，波浪测量系统提出了配备运动学GPS（K-GPS）的阵列浮标，并描述了常规的水粒子测量方法的波方向估计方法。此外，在船上安装了三个K-GPS天线和IMU（惯性测量单元）以显示本文进行了三个实验。首先，将阵列式GPS浮标系统放置在港口的内外。最后，在渡轮上安装了三个K-GPS天线和IMU，并观察了其横摇，俯仰和偏航运动的振荡，并将其与IMU的结果进行了比较。此外，通过K-GPS还显示了摇摆，喘振和起伏的其他三个水平运动。根据本实验的结果，通过GPS观测了港内外的波周期为12秒的0.083 Hz和周期为11.5秒的0.087 Hz的波此外，从系泊船振荡的比较结果来看，与IMU相比，K-GPS进行的滚动，俯仰和偏航的每个运动均显示出±1.8度的良好差异，与IMU相比最大。摇摆，喘振和摇摆的其他三个水平运动还显示了通过K-GPS升沉。

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