【作者】 张建通；

【导师】 高孝洪；

【作者基本信息】 武汉理工大学 ， 交通信息工程及控制， 2002， 硕士

【摘要】 “疏浚作业仿真器的研制”是国家“九五”重点科技攻关项目“1750m~3／h绞吸式挖泥船新技术装备实验研究及应用”项目中的一个重要子课题，它主要用于培训学员掌握先进的疏浚作业方法，以达到优化疏浚作业的目的。具有视景仿真系统的疏浚仿真训练器的研制需要运用计算机技术、自动控制技术、图形图像处理与生成技术、计算机仿真技术、多媒体技术、疏浚工程等诸多高新技术。本文结合疏浚作业仿真器的视景仿真子系统，论述了三维虚拟建模、虚拟物体运动关系数学描述、最小原型形软件设计方法、网络通信、多线程编程等多项关键技术。 首先本文介绍了当前主要的软件开发方法，并对这些方法的优缺点进行了大致分析，然后根据承担项目的特点进行分析，然后确定了采用最小原型法去开发系统。其次，介绍了利用三维建模工具MultiGen建立三维疏浚船模型的方法，其中涉及虚拟三维模型的建立、自由度(DOF，Degree Of Freedom)的设定、运动关系的数学描述等内容。在介绍完本文中用到的计算机图形学的基本知识之后，文章详细介绍了水下视景仿真的设计方案和实施步骤，这里包括虚拟地形建模、使用VC++6.0结合Open GL开发应用程序、虚拟模型与控制盘台的交互、疏浚作业剖面仿真等内容。最后论文中对多线程编程进行了详细分析，针对实时视景仿真系统的特点，使用一个线程完成控制信号的接收工作，另一个线程负责整个场景画面的绘制工作。这种方法避免了视景仿真系统的画面与在控制盘台设备上操作信号的滞后现象，增强了仿真的真实感。 作为疏浚仿真训练器的一部分，视景仿真系统把学员在控制盘台上的操作结果直观地实时显示在屏幕上，简化了操作评估过程，并且使疏浚仿真训练器有了良好的人机界面，完善了琉浚仿真训练器的整体功能，使之能够达到较好的培训效果。更多还原

【Abstract】 "The research of dredging process training simulator" is a part of the project "Research And Development Of New Equipment And Technologies In The 1750m3/h Cutter Suction Dredger", which is a Chinese Ninth Five Years Key Project. The dredging process training simulator is used to train the operator so as to make the dredging process more efficient. The system uses a lot of new techniques including computer science, multimedia technology and computer graphics science and so on. According to the visual system of the dredging process training simulator, this paper presents many important techniques such as three-dimension objects modeling, mathematics description of the virtual objects motion relations, the minimal-shape software engineering method, multi-thread program and so on.Firstly, this paper introduces the main software engineering techniques and analyzes the excellence and limitation of each one. The minimal-shape software engineering method is adopted according to the characteristic of the project. Secondly, the paper gives out the procedure of the three-dimensional dredge boat modeling, which uses the VR (Virtual Reality) tool-MultiGen. Establishing the DOF (DOF, Degree Of Freedom) of the VR model and the VR model motion relations are depicted in the third chapter. At last, the paper presented the visualization implementation of the under working state for a cutter suction dredging simulator in detail after a brief introductions of the basic knowledge of computer graphics science. This part includes terrain visualization, interactive operations between VR model and control panel, the profile system of the dredge working state and so on. Also in this part, multi-thread programming and network communications are presented. In the visual system one thread process receives the control signal and the other take charge of the refreshing window.This technique solves the delay phenomenon between the visual system and the operations on the control panel.As a part of the dredging process training simulator, the visual system can display the result of the trainee’s operation on the screen in real-time. This simplifies the evaluation procedure and perfects the function of the dredging simulation training system. The whole system provides a way for the trainee to dredge efficiently.更多还原