面向并行设计的虚拟原型技术研究

虚拟原型技术是在虚拟的逼真环境下,对产品设计信息进行协同仿真验证的有效手段,它可有效支持并行设计,缩短产品开发周期,在分析了虚拟原型与并行的关系后,提出了基于域对象的虚拟原型建模与仿真方法,并阐述了支持虚拟原型的集成框架的关键技术。     

产品开发环境中协同仿真的研究与实现

为了满足日益增长的产品设计开发需求,各种仿真技术不断的更新换代,这就要求协同仿真平台能够根据需求动态的集成新的仿真功能或淘汰旧的技术。同时分布式计算已成为产品设计开发的重要手段。因此本文提出了基于OSGI框架仿真组件集成于产品设计开发环境中,通过OSGI的动态性实现产品开发环境中仿真功能的动态安装与移除,并应用Web Services技术实现基于组件的跨区域的协同仿真,探讨了协同仿真平台的体系结构及OSGI,Web Services等关键技术的特征、功能及具体实施方法。     

复杂产品协同仿真与设计技术的研究

协同仿真技术可以为复杂产品的研发、设计、创新、评估、管理提供全面支持.文中在分析复杂产品协同仿真的特征、功能及建模过程的基础上,提出基于HLA/WE_RTI的复杂产品协同仿真平台及其体系结构,探讨了基于仿真产品的一体化建模、仿真评估、仿真模型库、协同创新、协同仿真信息等关键技术及实施方法.结合工程实际应用,重视对复杂产品协同仿真关键技术的研究,进一步集成、优化、完善协同仿真平台功能,形成应用技术开发与完善应用的良性持续发展.     

基于虚拟样机的复杂产品协同设计与仿真关键技术研究

主要研究并行工程环境下复杂产品虚拟样机协同设计与仿真的体系结构及其关键技术。提出虚拟样机协同设计与仿真系统的体系结构与整体解决方案,研究面向虚拟样机的数字化多领域集成建模理论与方法,建立面向虚拟样机开发全生命周期的集成过程管理与冲突协调模型,提出面向复杂产品虚拟样机开发的多学科协同设计、协同仿真和智能决策支持的理论与方法,建立复杂产品虚拟样机协同支持环境,有效提高企业创新能力和核心竞争力。     

基于服务组件的复杂机械产品协同仿真系统架构

功能各异的CAE软件在提高产品仿真分析效率的同时也带来了一系列工程问题,大量仿真作业中的多层次流程管理是其中一个关键问题,而且各种 CAE 软件的功能模块集成是企业真正实现仿真作业流程化管理必需解决的问题。首先根据复杂机械系统仿真的特点总结出机械产品通用的仿真流程,为了实现机械产品仿真过程真正的流程化,引入统一仿真模型(Unified Simulation Model,简称为USM)的概念,以解决仿真过程中的知识、对象、流程的统一问题。同时结合Web服务技术将经过测试的仿真组件模型进行有效发布,来提高模型的互操作性和可重用性。最后将该技术应用于协同仿真环境建设,并通过实际工程应用验证了技术的可行性和灵活性。     

基于虚拟样机的复杂产品协同设计与仿真关键技术研究*

主要研究并行工程环境下复杂产品虚拟样机协同设计与仿真的体系结构及其关键技术。提出虚拟样机协同设计与仿真系统的体系结构与整体解决方案,研究面向虚拟样机的数字化多领域集成建模理论与方法,建立面向虚拟样机开发全生命周期的集成过程管理与冲突协调模型,提出面向复杂产品虚拟样机开发的多学科协同设计、协同仿真和智能决策支持的理论与方法,建立复杂产品虚拟样机协同支持环境,有效提高企业创新能力和核心竞争力。     

多学科系统级虚拟样机建模与仿真解决方案

本文从当前产品设计过程对多学科联合仿真的需求出发,分析了产品协同设计对仿真技术三个层次的功能需求,列举了当前实现多学科集成仿真的一般方法,并详细介绍了MSC.Software多学科系统级虚拟样机建模和仿真的解决方案以及具体实例.     

面向复杂产品的异构数据集成模型研究*

为解决动态联盟环境下的复杂产品异构数据集成,针对传统集成技术存在的问题,在对Web服务等相关技术进行分析的基础上,提出了基于Web服务的复杂产品异构数据集成平台层次模型。研究了相关的关键技术,重点论述了企业产品设计集成机制和产品共享数据转换模型。最后结合某项目实例,进行了系统实现,为实现应用软件集成与设计资源共享提供了有效的解决方案。     

基于ADAMS与Simulink的协同仿真技术及应用

基于多学科协同建模与协同仿真的虚拟样机技术，已经成为现代复杂产品设计的一个重要手段，文中主要对ADAMS与Simulink之间的协同仿真技术进行介绍。通过分析协同仿真实现方式和两者提供的外部接口，探讨了ADAMS与Simulink进行协同仿真的若干种方法，实现了两者在单机环境和网络环境下的交互式协同仿真，并以一个五自由度转台的控制器设计为例，验证了这些协同仿真方法的可行性和实用性。支持网络环境下的远程协同仿真技术为跨区域的多领域部门之间进行产品协同设计提供了便利，是工程仿真软件发展的一个重要方面。     

基于HLA的卫星协同仿真系统研究与实现

基于HLA体系规范,研究协同仿真软件体系结构,设计了一个卫星协同仿真系统CSS(Coordinated Simulation System).首先简要介绍了系统研究的意义,以系统功能以及系统要素为基础分析了系统的需求、提出了基于"协同"的设计原则以及系统性能评估指标,然后介绍了实现CSS的关键技术--使命空间的任务体现结构和多分辨率建模技术 ,以及CSS的分层设计的系统结构,并以仿真任务管理成员和卫星成员为例分析了设计CSS联邦成员的设计思路,最后提出了一个原型系统.该系统仿真了卫星侦查、数据通信、数据评估等整个过程对大型复杂系统的仿真具有很好的借鉴意义.     

Expanding bottleneck management from manufacturing to product design and engineering processes

Bottlenecks inhibit the performance of companies. Up to now, bottleneck management research has concentrated on manufacturing processes, while neglecting product design and engineering processes. This research fills this gap through developing and testing of a new bottleneck management concept for product design and engineering processes. The new concept is developed using a system theory modelling approach and comprises of four bottleneck management counter measures. Two propositions were developed to test the concept through an event-discrete simulation model. The simulation is grounded on empirical data from three design-driven companies and tests the impact of the four bottleneck management counter measures on the performance of product design and engineering processes. The findings from the simulation confirm the applicability of the newly developed bottleneck concept to improve the performance of product design and engineering processes. In doing so, this research study expands bottleneck management for the first time from manufacturing to product design and engineering processes.     

Embedding Reliable Numerical Analysis Capabilities into an Enterprise-Wide Information System

A simulation environment to support engineering design embedded in an enterprise-wide information system is presented. The environment consists of a set of structures and managers housing the problem definition, tools for controlling the simulation model construction and execution, and the interaction of simulation processes with the product data management system. The issues associated with the introduction of automated and adaptive geometry-based simulation processes into the engineering design process are emphasised.     

A structured methodology for implementing engineering data management

One of the most significant positive effects on product and process development in recent years has been the application of data management techniques. Engineering data management or product data management is the most promising one. The implementation of engineering data management is heavily dependent on the engineering process and involves the technologies of management, engineering, and information. However, as there is no commonly acceptable approach and methodologies for implementing engineering data management, it’s implementation becomes a bottleneck.This paper presents a structured methodology for the implementation of engineering data management. The approach consists of a series of steps, from business and engineering process analysis, modeling and reengineering, through system design and modeling, to system realization.This research will facilitate engineering process improvement and the planning, design and implementation of engineering data management. Consequently, it will help increase product development capability and quality, reduce development cycle time and cost, and hence increase product marketability.     

组件式机械仿真流程建模平台的设计与实现

在具体分析WFMC规范基础上,结合组件开发思想,采用Java语言,利用EMF和GEF技术,根据仿真流程实际需要抽象成仿真组件,实现了组件式机械仿真流程建模平台,并简要介绍了流程在执行期间的状态表示机制.根据抽象出的13个静力学仿真组件,利用此建模平台完成了针对机械产品静力学仿真流程模型的建立,并从语法上对流程进行了有效性检验,证明了平台的适用性和灵活性.     

VISSIM在地铁枢纽客流微观仿真中的应用

枢纽的集散效率评价是地铁建设和运营需要解决的核心问题之一,而目前在这方面缺乏相应的理论和技术支撑.提出通过动态模拟地铁枢纽站内乘客疏散的方法来评估枢纽的集散效率,借助路面交通管理和控制的成熟办法和相应的仿真软件--VISSIM,并在此基础上进行枢纽抽象建模、地铁换乘枢纽的参数校核和枢纽内乘客模拟.作为案例,以北京地铁宣武门枢纽换乘站为研究背景,对该站未来高峰时段的客流进行了模拟,取得了较好的仿真效果.通过分析得出,利用VISSIM进行地铁枢纽的客流微观仿真以达到评估枢纽集散效率的目的,具有实用性和有效性.     

工程产品开发框架技术

本文论述了工程设计框架环境下，设计过程中的数据管理，资源管理，设计流管理以及并行设计中的冲突协调。     

Integration of engineering change objects in product data management databases to support engineering change analysis

This study proposes a product data management (PDM) database that can support engineering change analysis (ECA). It can integrate ECA with the existing main product development process managed by PDM systems. Since engineering change (EC) history is a key EC data element that enables ECA, this study extends PDM databases to represent the EC history with existing entities for ECs and associated products and their product structures. To show the feasibility of the proposed PDM database, this study integrates a prototype PDM system with on-line analytical processing (OLAP) tools and a data mining module for ECA. It also applies the implemented tools to two typical ECA applications, EC evaluation and EC propagation problems. The illustrative application examples show that the proposed PDM database can support ECA through multidimensional data analysis with OLAP and data mining with association rules.     

支持并行设计的产品数据管理

产品数据管理是基于数据库,分布计算和网络通讯等技术发展起来的新型工程数据管理技术,是有效管理和控制所有与产品有关的信息的并行设计框架,本文研究了支持大型电子设备并行设计的产品数据管理系统ＹＣ－Ｂｒｉｄｇｅ的开放式体系结构,并介绍了它的主要功能,实现方法及技术特点。     

CAD-integrated engineering-data-management system for spring design

In an iterative design process, a large amount of engineering data needs to be processed. Owing to the limitations of traditional software, the engineering data cannot be handled simultaneously and are usually divided into geometric and non-geometric data in order to be managed by separate systems. In the spring industry, which requires repeated definition of complicated shapes, design engineers need special interfaces for efficient product design and drafting. In this paper, the CAD-integrated engineering-data-management system is developed and implemented for spring design, in order to simplify the drafting and data-management processes. This research focuses on three main issues that can be also applied to other applications, particularly for component designs. These issues include: (1) product model definition, (2) CAD-database communication, and (3) human-machine interface development. With the definition of product model, the system identifies which data should be accessed from data files to generate the proper drawings, and which database structure should be constructed for the application domain. By the use of CAD-database communication, when engineers modify the geometric or non-geometric parameters of a product design, these parametric values can be simultaneously updated in the database. Furthermore, the support of human-machine interface enhances the efficiency in routine manipulation of support engineering data management and design/redesign processes.