基于网络的虚拟实验平台的设计与实现-机械制造及其自动化专业论文.docx

基于网 基于网络的虚拟实验平台的设计与实现 DESIGN AND IMPLEMENT OF VIRTUAL EXPERIMENT LABORATORY BASED ON INTERNET ABSTRACT Experiment is the way which people use equipment or reagent to work independently in order to obtain experiment or to train their skills. Normally, the virtual experiment is compared to the experiment in the real about the objects which people can touch and feel in the experiment. In real life ,they appears in the form that you can feel and touch ,such as the experiment ground ,equipments ; in the other hand these things are simulate by computer instead of can be feel and touch in the virtual experiment , the result of the experiment is obtained from computer which different form the real ones also . This thesis first introduced the history of the virtual experiment , and also introduce the research of the virtual experiment in nowadays . By searching the purpers of the users , we make sure the details of the virtual experiment’s structure and components . The work we fond in designing and implying of the virtual experiment may be summarized as follows: Compared B/S net structure with C/S net structure , for the famine of virtual experiment ,choose the B/S net structure ; Parametric design of the part –model-library; The virtual analysis in assembly process and dynamic simulation by virtual linkage; Summarize the research and make the further goal of the research. KEY WORDS: virtual ,experiment ,net ,parametric ii 河北工 河北工业大学硕士学位论文 第一章 绪 论 §1-1 课题的提出与来源 实验是一门科学，是一种方法，也是一种手段。通过实验，人们得到的是经验，培养的是技 巧。一般来说实验过程中人们需要借助于各种外部设施，譬如仪器设备、试剂试样等。而对于虚 拟实验的定义，通俗来说它是相对于真实实验而言的[1]。我们所谓的真实的实验是以实物为基础 的，譬如金相实验中我们要用到各种的金属材料，观察用的高倍显微镜；太空实验中我们需要搭 载的宇航船、实验观察用的各种植物及种子，土壤、水；医学实验中的手术室，医生用的工具、 手术设备；化学实验中的试管、试剂等等，这些都是客观存在的物体。相对而言，在虚拟实验的 环境下，这些都是通过在计算机上软件模拟而成，其客观存在的只是二进制的代码。 虚拟实验室 (Virtual Laboratory)，它的概念最早出现在上个世纪八十年代的美国，它是 指借助图形图像仿真和虚拟现实在计算机上创建一个虚拟实验环境，其中每一个可视化的三维物 体代表一种实验对象，通过鼠标的点击以及拖曳操作，用户可以进行虚拟的实验[2]。对于虚拟实 验的运行模式我们把它归结为如图 1.1 所示的网络拓扑结构。对于虚拟实验的定义可以归结为： 虚拟实验中心 Web 服务器 功能服务器 校园网用户 远程用户 学生宿舍 多媒体教