网络硬件虚拟实验室中虚拟元器件和虚拟设备库建模方法的研究

简述网络硬件虚拟实验室系统中虚拟元器件与虚拟设备库(以下简称为虚拟元件库)的建模方法。提出模型库需要满足的几个条件,在此基础上将面向对象的方法运用到虚拟元器件库和虚拟设备库的建模中,根据组成虚拟实验系统的实体对象及其之间的关系来构造仿真模型,使模型具有良好的独立性、可扩展性、可维护性和可重用性。     

为什么企业需要自己定制电气部件数据库

在使用专业电气软件进行电气设计的过程中，我们会用到软件厂家提供的符号库和部件数据库，符号库是有标准规范的，厂商提供这样的数据库非常容易，但元器件部件库因厂家的诸多实际情况，而使得软件企业无法提供对于每个企业都适用的部件库，这就需要企业根据自身的实际情况定制符合企业自身习惯的元器件部件库。     

基于Solidworks开发机械制图虚拟模型库

随着计算机、网络和多媒体技术的迅猛发展,为了适应科技教学、网络教学的需要,利用先进的多媒体技术构建《机械制图》虚拟模型库,优化教学资源,丰富教学手段,制作方法主要采用了国际上流行的三维实体设计软件SolidWorks进行模型造型,采用网页设计软件Dreamweaver MX组织模型库框架,该模型库可以根据教学需要及时地添加、更换、修改和完善模型库中的模型。同时,库中的模型可以随意翻转、移动、拆装和仿真运动。具有很好的教学演示效果。在使用、携带、保管和成本等方面都有着传统模型无法比拟的绝对优势。     

一个模型库系统的设计与实现

讨论了模型库系统的设计与实现方面的技术问题，包括系统结构，模型库管理系统功能、模型表示方法、三级模式、“三库”接口、模型构造原则及模型调用过程等。     

基于VR的计算机网络及维护实验系统的设计与研究

为培养具有创新性的综合复合型人才,创建虚拟模型库,并利用UG和Pro/ENGINEER等软件创建计算机网络组网的虚拟模,进行元器件的三维制作和组网仿真,构建了基于虚拟技术计算机网络及维护实验系统,该系统具有操作方便、易实现、可靠度高等优点。     

运用MAPGIS软件生成宗地图

结合MAPGIS地籍管理信息系统软件的建库过程，阐述了宗地图的概念以及利用MAPGIS软件绘制宗地图的过程。     

基于PyQt5的铸造过程数据管理软件开发

针对铸造行业材质成分数据缺少可靠管理、铸件结构模型难以保存，以及复用、铸件缺陷检测依赖人力三个问题，开发了基于PyQt5的铸造过程数据管理软件。系统由材料成分与性能库、铸件结构与模型库、铸件缺陷识别三部分组成。该管理软件使用Pyinstaller打包成桌面式应用，可在Windows10系统运行，可移植性高。     

使用Microsoft Security Essentials保护你的虚拟机

虚拟化的使用带来一些麻烦的许可证问题。有了Microsoft Security Essentials。既能保护虚拟机（VM）免受病毒侵害，又无需为每个VM分别购买软件。     

通用决策主持系统通过鉴定

上海计算所副研究员顾鼎铭等研制成功以模型库、数据库、工具库(“三库”)理论为基础的通用决策支持系统,在沪已通过技术鉴定,确认这一软件系统可使计算机管理从基于信息存储和检索的事务处理阶段,上升到基于模型和知识的辅助决策阶段,这对于实现管理科学化具有重要意义。     

协同生产计划与控制（PPS）系统

针对一般PPS系统存在的问题,采用智能管理方法,以数据库为中心,通过多库协同软件协调数据库、模型库、知识库及方法库,使决策支持系统与PPS事务处理系统有机地结合为一体,形成一个智能PPS系统。     

基于CATIAV5某新型火箭炮组件库的建立

以CATIAV5三维CAD软件为基础,结合某新型火箭炮电源配件组件库的建立,研究探讨了如何在大型装备的CAD设计中提高效率。     

Integrated manufacturing features and Design-for-manufacture guidelines for reducing product cost under CAD/CAM environment

The main contribution of the work is to develop an intelligent system for manufacturing features in the area of CAD/CAM. It brings the design and manufacturing phase together in design stage and provides an intelligent interface between design and manufacturing data by developing a library of features. The library is called manufacturing feature library which is linked with commercial CAD/CAM software package named Creo Elements/Pro by toolkit. Inside the library, manufacturing features are organised hierarchically. A systematic database system also have been developed and analysed for each feature consists of parameterised geometry, manufacturing information (including machine tool, cutting tools, cutting conditions, cutting fluids and recommended tolerances and surface finishing values, etc.), design limitations, functionality guidelines, and Design-for-manufacture guidelines. The approach has been applied in two case studies in which a rotational part (shaft) and a non-rotational part are designed through manufacturing features. Therefore, from manufacturing feature library a design can compose entirely in a bottom-up manner using manufacturable entities in the same way as they would be produced during the manufacturing phase. Upon insertion of a feature, the system ensures that no functionality or manufacturing guidelines are violated. The designers are warned if they attempt to include features that violate Design-for-manufacture and Design functionality guidelines. If a feature is modified, the system validates the feature by making sure that it remains consistent with its original functionality and Design-for-manufacture guidelines are re-applied. The system will be helped the process planner/manufacturing engineer by automatically creating work-piece data structure.     

基于实例推理的冲模智能CAD系统关键技术的研究

本文以三维软件(SolidWorks)为平台,对基于实例推理的智能冲模CAD系统关键技术进行了研究。讨论了冲模建模及参数化实现、实例库的建立、实例的检索和存储、实例的评价和修改的方法。     

EDMI系统拟实制造软件的研究开发

该文在对ＥＤＭＩ系统ＶＭ问题研究的基础上,提出了以高级语言ＣＶＩ为外壳,以作者开发的优化及无缝连接模块为纽带,将动画仿真软件ＳＩＭＡＮ／ＣＩＮＥＭＡ、ＣＡＤ软件ＰＲＯＴＥＬ和作者开发的ＳＭＴ动画仿真模块集成于一体,构成了ＥＤＭＩ系统数据驱动式的ＶＭ软件,目前已基本完成。     

Shape optimization of heavy load carrying components for structural performance and manufacturing cost

This paper addresses the trade-off between structural performance and manufacturing cost of heavy load carrying components by incorporating virtual machining (VM) technique in computer-aided design (CAD)-based shape optimization problem. A structural shape optimization problem is set up to minimize total cost, subject to the limits on structural performance measures. For every design iteration, finite element analysis (FEA) is conducted to evaluate structural performance, and VM is employed to ascertain machinability and estimate machining time. Design sensitivity coefficients of objective function and constraints are computed and supplied to the optimization algorithm. Based on the gradients, the algorithm determines design changes, which are used to update FEA and VM models. The process is repeated until specified convergence criterion is satisfied. Application programs developed to integrate commercially available CAD/CAM/FEA/Design optimization tools enable implementation in virtual environment and facilitate automation. The application programs can be reused for similar design problems provided that the same set of tools is used.     

基于Inventor的三维参数化部件库系统的开发方法

介绍了基于AutodeskInventor的部件库的体系结构和实现方法。把部件库系统分为零件库和部件库两层结构,通过部件模型确定组成部件的组成零件及其装配关系,通过数据表和程序确定零件的规格。此方法解决了常用三维CAD软件不直接支持装配件参数驱动的问题,使得基于三维CAD软件创建部件库系统成为可能。文中所述部件库系统是使用VC++对Inventor进行二次开发而得到的。同时,该方法也适用于其他常用三维CAD软件。     

电子产品VM SMT中PCB版图的恢复研究

在电子产品虚拟制造（Virtual manufacturing,VM)系统的研发中,表面贴装（SMT）是不可缺少的一个功能,SMT的基础又是所设计电路的PCB版图。该文提出VMSMT贴装软件应是数据驱动式的仿真软件,并以CAD软件protel98为对象,研究了其PCB版图信息,设计了算法,可利用该格式数据库恢复所设计的PCB版图,该软件为下一步实现电子产品VM系统SMT模块解决了一个基本问题。     

基于.NET的Nx二次开发技术在标准件库中的应用

随着CAD技术的发展,CAD软件得到了广泛的应用,在这些平台上开发符合企业所需要的零件库的工作也取得了很大成果。但随着网络和信息技术的发展,这些零件库的缺点与不足也逐渐显露了出来,界面不够友好、重复开发现象严重、资源不能共享、移植性和扩展性较差等。基于现有的二次开发存在的问题,重点对CAD软件系统NX的NXOpenFor.Net的开发方式进行了研究,获取完整的开发过程,采用将交互式和批处理式相结合的二次开发模式,提出了一种新的基于UG的企业标准件数据库系统,实现了企业标准件数据库系统中的数据库和图形库同步管理。     

A generic approach of integrating 3D models into virtual manufacturing

Various 3D modeling software has been developed for design and manufacturing.Most of the commercially available software uses native file formats,which may not be able to be read or understood by other software.This paper deals with the development of a generic approach of a 3D model conversion program for virtual manufacturing(VM),using a lexical analyzer generator Lex and the Open Graphic Library(OpenGL).The program is able to convert 3D mesh data between four universal file formats,i.e.,Stereolithography(STL),Virtual Reality Modeling Language(VRML),eXtensible Markup Language(XML),and Object(OBJ).Simple assembly functions can be applied to the imported models.The quaternion angle is used for object rotation to overcome the problem of gimbal lock or a loss of one degree of rotational freedom.The program has been validated by importing the neutral format models into the program,applying the transformation,saving the new models with a new coordinate system,and lastly exporting into other commercial software.The results showed that the program is able to render and re-arrange accurately the geometry data from the different universal file formats and that it can be used in VM.Therefore,the output models from a VM system can be transferred or imported to another VM system in a universal file format.     

家电产品CAD系统

文中介绍了在企业中已获得应用的ＣＡＤ系统，并叙述了网络ＣＡＤ应用环境及应用效果，文中介绍了图库管理和图库维护系统软件具有多种实用功能和良好的用户界面，此软件对所有企业都具有广泛的推广和使用价值。