Real-time Visualization System for Large-scale Calculation Using Distributed Network

利用分布式网络进行大规模计算的实时可视化系统

• 批准号: 12450400
• 负责人: HASEGAWA Kazuhiko
• 金额: $ 6.34万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450400/
• 关键词: ship; large-scale computation; distributed computation; real-time computation; visualization system

It becomes of great importance to conduct very large-scale numerical calculation in various fields. It is generally said that the computation cost and time is nearly proportional to the square of the solution-space scale.In this research project, we have conducted such large-scale computation in various fields from computational hydrodynamics, computational structure analysis, computational material engineering, and simulation of ship dynamics, some of which are necessary to be conducted in real time for visualization. The following conclusions are drawn.1) Marine traffic simulator for congested waterways is developed. Further, model ship experiment was conducted in a virtual sea area produced by this simulator. The simulator was the server for the virtual marine traffic flow and for the control of the model ship. PCs on board are used to send and receive data such as GPS position data, Gyro ship motion data and command for the model ship such as rudder angle and propeller revolutions. This system is the main result of this project and distributed computation network is fully utilized using Internet and serial link.2) Simulation program for ship capsize was developed. Mathematical model was revised to get more accurate result compared with model ship experiments. Besides, animation program was also developed to show how the ship will capsize. It is very good example of necessity of distributed computing to get faster computation. The program may be useful to understand the capsize phenomena visually and to use as a real-time simulator for ship masters to teach them how to avoid capsizing.3) Life cycle assessment for marine and land transportation was conducted. The environmental effect was compared with marine and land transportation and it is found the effect of marine transportation is a fourth of that of trucks.

在各个领域进行大规模的数值计算变得非常重要。一般认为，计算的成本和时间几乎与解空间尺度的平方成正比，在本研究项目中，我们在计算流体力学、计算结构分析、计算材料工程、船舶动力学模拟等多个领域进行了大规模的计算，其中一些是为了可视化而必须在真实的时间内进行的。主要结论如下：1）开发了适用于拥挤航道的船舶交通仿真器。在此基础上，利用该模拟器生成的虚拟海域进行了船模试验.模拟器是虚拟海上交通流和模型船控制的服务器。船上的PC用于发送和接收数据，如GPS位置数据，陀螺仪船舶运动数据和命令的模型船，如舵角和螺旋桨转速。该系统是本项目的主要成果，充分利用了分布式计算网络，通过Internet和串口连接。2）开发了船舶倾覆仿真程序。对数学模型进行了修正，使模型计算结果与船模试验结果相比更加准确。此外，还开发了动画程序来显示船舶将如何倾覆。这是一个很好的例子，说明了分布式计算的必要性，以获得更快的计算。该程序可用于直观地了解船舶倾覆现象，并可作为实时模拟器，供船长学习如何避免船舶倾覆。3）对海洋和陆地运输进行了生命周期评估。比较了海运和陆运对环境的影响，发现海运的影响是卡车的四分之一。

项目成果

長谷川和彦: "輻輳海域シミュレータによる代替航路評価"関西造船協会会誌. (発表予定). (2001)

长谷川和彦：“使用拥挤区域模拟器评估替代路线”，关西造船协会杂志（2001 年）。

長谷川和彦: "仮想海上交通センターによる航海支援システム"関西造船協会会誌. (発表予定). (2001)

长谷川和彦：“使用虚拟海上运输中心的导航支持系统”关西造船协会杂志（2001 年）。

Kazuhiko Hasegawa: "Feasibility study on intelligent marine traffic system"5^<th> IFAC Conference on Manoeuvring and Control of Marine Craft,(MCMC2000). 327-332 (2000)

长谷川和彦：“智能海上交通系统的可行性研究”第5届IFAC船舶操纵与控制会议，(MCMC2000)。