STEP数据模型在关系数据库SQL Server上的映射

数据库实现是当前STEP数据模型实现数据交换的较优方法。研究STEP数据模型在关系数据库SQL Server上的映射,介绍数据字典的建立,详细阐述EXPRESS数据模式向SQL Server 2000转换的规则和方法,并给出一个具体的应用实例。结果表明,在关系数据库SQL Server上实现STEP数据模型的映射是可行的。     

Mobile database nodes for manufacturing information management: a STEP based approach

This paper describes research currently being carried out in the area of information management architectures for flexible manufacturing systems (FMS). This work originates from the idea that process control may be achieved by machines as in the standard approach but also by all the products carrying their own information. So, distribution of the information system onto each individual product requires tools and methods to manage and to provide access to product information for both automated systems and human operators. Automatic identification technologies using electronic data carriers can provide such functions and act as product information vectors. Our approach is based on the STEP technology to define computer-aided tools for data acquisition and management of product-related information implemented on mobile database nodes circulating in a CIM environment.     

网络控制系统在低能强流离子束装置中的应用

为了提高中国原子能科学研究院串列加速器控制的自动化水平,设计并实现了一种先进的低能强流离子束网络控制系统.该系统吸取了近年来IT领域的最新发展成果,建立了传输介质为光纤的以太网控制网络.经过实际运行表明,应用设计合理,达到了预期设计目的.     

STEP信息集成软件工具的设计和实现

ＳＴＥＰ是国际标准化组织ＩＳＯ正在组织开发的应用于计算机集成制造系统（ＣＩＭＳ）信息集成的产品数据表达与交换标准，ＳＴＥＰ不仅是一种规范，更是一种信息集成技术，本文以ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统集成为背景，提出了ＳＴＥＰ信息集成支持工具ＥｘＴｒａ的设计和实现技术，该软件工具已成功且有效地应用于ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统集成中。     

A STEP-BASED CAD/CAPP INTEGRATION

ＡＳＴＥＰ－ＢＡＳＥＤＣＡＤＩＣＡＰＰＩＮＴＥＧＲＡＴＩＯＮＺｈｅｎｇＬｉａｎｙｕ；ＤｕＰｅｉＡＳＴＥＰ－ＢＡＳＥＤＣＡＤＩＣＡＰＰＩＮＴＥＧＲＡＴＩＯＮ￥ＺｈｅｎｇＬｉａｎｙｕ；ＤｕＰｅｉＡｂｓｔｒａｃｔＴｈｅｉｎｆｏｒｍａｔｉｏｎｉｎｔｅｇｒａｔ...     

基于STEP的零件加工工艺计划模型

为了满足ＣＩＭＳ环境下工艺系统与其它系统集成的需要，建立了标准工艺计划模型具十分重要的意义。本文描述了一个基于ＳＴＥＰ的零件加工工艺计划模型，介绍了建立这一模型的关键技术，给出了参照ＳＴＥＰ建立工艺计划模型的方法。     

Advanced Geometric Modeler with Hybrid Representation

An advanced geometric modeler GEMS4.0 has been developed,in which feature representation is used at the highest level abstraction of a product model.Boundary representation is used at the bottom level,while CSG model is adopted at the median level.A BRep data structure capable of modeling non-manifold is adopted.UNRBS representation is used for all curved surfaces,Quadric surfaces have dual representations consisting of their geometric data such as radius,center point,and center axis.Boundary representation of free form surfaces is easily built by sweeping and skinning method with NURBS geometry.Set operations on curved solids with boundary representation are performed by an evaluation process consisting of four steps.A file exchange facility is provided for the conversion between product data described by STEP and product information generated by GEMS4.0.     

Variant design for mechanical artifacts: A state-of-the-art survey

Variant design refers, to the technique of adapting existing design specifications to satisfy new design goals and constraints. Specific support of variant design techniques in current computer aided design systems would help to realize a rapid response manufacturing environment. A survey of approaches supporting variant design is presented. Capabilities used in current commercial computer aided design systems are discussed along with approaches used in recent research efforts. Information standards applicable to variant design are also identified. Barriers to variant design in current systems are identified and ideas are presented for augmentation of current systems to support variant design.     

Utilization of STEP AP 210 at The Boeing Company

Boeing has been working on the development and implementation of STEP AP 210 since its inception. Using a combination of internally funded activities, external government contracts and multi-company pilots, Boeing has developed prototype tools to utilize AP 210 and is poised to move these tools into production. This paper begins with a brief overview of STEP and AP 210. The status of available AP 210 vendor translators (data generators), along with viewers and analysis programs (data consumers) is covered. Discussion continues with present and planned usage of AP 210 in several companies with the primary emphasis on implementation at The Boeing Company. The document concludes with a summary of key points.     

基于 STEP 标准的 CAD 与 CAPP 信息集成

说明了基于标准数据存取接口（ＳＤＡＩ）生成ＳＴＥＰ中性文件实现数据交换的基本思路，提出一个ＣＡＤ与ＣＡＰＰ系统通过ＳＴＥＰ中性文件实现信息集成的方案及一个完整的零件信息模型。最后用一个基于ＡｕｔｏＣＡＤ的特征造型系统给出了实施范例。