以Virtools为基的交互式产品虚拟展示技术研究

针对目前电子商务模式中产品虚拟展示现状及特点,提出基于Virtools平台下的交互式产品虚拟展示方法,并以齿轮油泵为例阐述产品虚拟展示的设计制作流程以及各个环节的实现方法,最终在网页上建立交互式的三维产品动态虚拟展示模型,有效地提高数字化产品的信息传达效果。     

机器人虚拟仿真实验平台的设计开发

针对机器人示教展示的需求,设计并开发基于Unity3D游戏开发引擎的机器人虚拟仿真实验平台.运用该平台对机器人进行三维建模与实时运动仿真,基于MQTT协议对机器人产生的实时数据进行主题订阅与数据解析,实现对虚拟机器人的数据驱动及机器人的虚实同步运动.研究结果表明:该仿真实验平台运行正常,能够满足虚拟机器人仿真运动的实时...     

基于多线程的测控平台虚拟示波器设计

采用C 编程语言和面向对象的方法,探讨了在VC开发环境下虚拟数字示波器的软件开发.研究了基于多线程技术的虚拟数字示波器的编程过程和技巧,结合面向汽车零部件试验的通用测控平台的硬件和软件分析,并以应用实例车辆减振器噪声测控平台验证该虚拟数字示波器的有效性.     

基于串联机构的三自由度运动平台设计与仿真分析

以串联机器人为研究对象,设计了一种三自由度串联运动平台,用于汽车驾驶模拟器。运用Inventor建立串联平台的三维模型,导入Adams,获得了平台的虚拟样机。针对汽车主要运行状态进行运动分解,设计虚拟样机的驱动函数模拟汽车运动时的动感,得到了各自由度运动及关键构件的状态参数。分析比较了平台有无减震装置时的性能,对各自由度传动方程进行了验证。提出一种基于Adams和Matlab联合仿真工作空间的新方法,并用该方法绘制了座椅质心的工作空间。获得的仿真数据为后续物理样机的结构设计、运动控制提供了可靠依据。     

面向行业的现代CAPP研究

随着CAPP在企业应用的逐步深入，个性化服务已成为企业信息化的重要服务，迫切需要针对行业特点如汽车、家电等开发行业CAPP系统。本文从构造一个易于行业化的通用CAPP开发平台的角度出发，提出面向行业的现代CAPP(IMCAPP)的概念。同时深入研究了基于虚拟数据库的IMCAPP的开发模型，并提出了IMCAPP的体系结构和满足的目标。     

基于UG的汽车手刹虚拟装配技术应用

介绍了虚拟装配技术,以UG软件为平台,阐述了汽车手刹虚拟装配的过程,实现了汽车手刹的虚拟装配和干涉检验,总结了虚拟装配中的关键环节。     

增强现实环境下汽车后桥虚拟拆卸系统的设计

针对汽车后桥在生产培训和研发阶段拆卸繁琐、成本高的问题,以Microsoft Visual Studio和Unity3D为开发平台,结合HoloLens的人机交互和空间映射技术,建立了增强现实环境下的汽车后桥虚拟拆卸系统.该系统包括后桥零部件展示、后桥的自动拆卸和手动拆卸模块.系统测试表明:该系统可以实现后桥虚拟模型在真实台架上的显示,能够通过自动和手动的方式快速实现汽车后桥的虚拟拆卸,系统具有良好的沉浸性和交互性,可以为设计、生产培训人员和工程应用提供有用的帮助.     

基于EON的网络虚拟装配技术的实现

基于网络的相关虚拟装配技术,使用EON Studio软件,通过三维产品建模、虚拟装配、网络发布等一系列步骤,实现了基于网络的人机交互虚拟操作,为各种产品的虚拟装配及虚拟展示探索出了较好的思路与方法。     

国产化虚拟仪器的研究与开发

介绍了虚拟仪器的概念.论述了智能虚拟控件原理及功能赋予、测试融合和积木式拼搭等概念.设计了基于智能控件原理的虚拟仪器开发平台.充分展示了国产化虚拟仪器产品及其在教育、监测诊断等方面的应用.     

基于web的交互式虚拟装配平台的开发与实现

基于网络的虚拟装配是实现产品网络化设计制造的一项重要技术,当前已经成为研究热点。提出了一个基于web的交互式虚拟装配平台,用于实现网络化的虚拟产品装配显示、管理和控制等;主要研究了该平台的体系结构及支持网络化虚拟装配中的几类关键技术与解决方法,在此基础上,开发了一个基于web的交互式虚拟装配平台原型系统。     

Ventilator performance evaluation system based on virtual instruments

A virtual instrument system is proposed to test the performance parameters of local-ventilator installed under coal mines,which can do ventilator parameter acquisition automatically,as well as plot and analyze the ventilator performance curve.The whole system is designed using the virtual instrument technology combined with network technology based on Labview platform.Experimental results show that it can monitor and evaluate ventilator’s performance parameters automatically and efficiently,which provides critical information for ventilator safety under coal mine.     

基于柔性元结构的广义模块化产品族建模及其应用

根据广义模块化设计原理。对广义模块化产品族和产品平台作了整体规划，阐述了柔性模块、虚拟模块、元结构以及柔性元结构等概念，提出了以柔性元结构为基础构建广义模块化产品族的思想。以组合框架式液压机的应用为例，分析了柔性元结构的具体创建过程。实践证明，该方法可以有效加速产品的设计．     

海洋工程船散料输送系统轮机的生产设计

海洋工程船是为海上石油开采服务的工程辅助船,主要分为三用工作船和平台供应船.经过几十年的发展,海洋工程船已向着大尺寸、多功能方向展.在此对海洋工程船散料输送系统轮机生产设计以及难点解决进行探讨.     

Kinetostatic modeling and analysis of an exechon parallel kinematic machine(PKM) module

As a newly invented parallel kinematic machine(PKM), Exechon has found its potential application in machining and assembling industries due to high rigidity and high dynamics. To guarantee the overall performance, the loading conditions and deflections of the key components must be revealed to provide basic mechanic data for component design. For this purpose, a kinetostatic model is proposed with substructure synthesis technique. The Exechon is divided into a platform subsystem, a fixed base subsystem and three limb subsystems according to its structure. By modeling the limb assemblage as a spatial beam constrained by two sets of lumped virtual springs representing the compliances of revolute joint, universal joint and spherical joint, the equilibrium equations of limb subsystems are derived with finite element method(FEM). The equilibrium equations of the platform are derived with Newton’s 2nd law. By introducing deformation compatibility conditions between the platform and limb, the governing equilibrium equations of the system are derived to formulate an analytical expression for system’s deflections. The platform’s elastic displacements and joint reactions caused by the gravity are investigated to show a strong position-dependency and axis-symmetry due to its kinematic and structure features. The proposed kinetostatic model is a trade-off between the accuracy of FEM and concision of analytical method, thus can predict the kinetostatics throughout the workspace in a quick and succinct manner. The proposed modeling methodology and kinetostatic analysis can be further expanded to other PKMs with necessary modifications, providing useful information for kinematic calibration as well as component strength calculations.     

Optimal load balancing leveling method for multi-leg flexible platforms

The working platforms supported with multiple extensible legs must be leveled before they come into operation.Although the supporting stiffness and reliability of the platform are improved with the increasing number of the supporting legs,the increased overdetermination of the multi-leg platform systems leads to leveling coupling problem among legs and virtual leg problem in which some of the supporting legs bear zero or quasi zero loads.These problems make it quite complex and time consuming to level such a multi-leg platform.Based on rigid body kinematics,an approximate equation is formulated to rapidly calculate the leg extension for leveling a rigid platform,then a proportional speed control strategy is proposed to reduce the unexpected platform distortion and leveling coupling between supporting legs.Taking both the load coupling between supporting legs and the elastic flexibility of the working platform into consideration,an optimal balancing legs’ loads(OBLL) model is firstly put forward to deal with the traditional virtual leg problem.By taking advantage of the concept of supporting stiffness matrix,a coupling extension method(CEM) is developed to solve this OBLL problem for multi-leg flexible platform.At the end,with the concept of supporting stiffness matrix and static transmissibility matrix,an optimal load balancing leveling method is proposed to achieve geometric leveling and legs’ loads balancing simultaneously.Three numerical examples are given out to illustrate the performance of proposed methods.This paper proposes a method which can effectively quantify all of the legs’ extension at the same time,achieve geometric leveling and legs’ loads balancing simultaneously.By using the proposed methods,the stability,precision and efficiency of auto-leveling control process can be improved.     

单侧自卸式矿车研究

为提高矿车在矿山运输中的效率,以三维软件Solid Edge为平台,以某企业2m^3单侧自卸式矿车为研究对象,运用先进的设计理论和方法对整个矿车系统进行了研究。在研究过程中采用虚拟样机技术,大大降低了研究成本,缩短了研究时间,找到了现有矿车卸载时的不足。在分析的基础上得到了较为合理的曲轨卸载曲线,同时对矿车卸载过程进行了稳定性校核,从而完成对2m^3单侧自卸式矿车的虚拟开发。     

Team-oriented parts information sharing platform

In today’s fiercely competitive market, in order to survive and develop, enterprises must possess a high degree of flexibility and rapid response capability. The same requirements also stand true for the parts information sharing. In the new collaborative product commerce (CPC), in particular, this kind of information sharing is a challenge. The traditional parts library (Plib), designed as enterprise-level, is unable to provide flexible and effective information sharing in CPC. Considering the principle of virtual organization in CPC, teams’ potential information capacity is exploited. And a team-oriented parts information sharing platform is proposed. This platform consists of the team-oriented parts information model based on Plib standard, the architecture of this platform, and three types of parts information sharing patterns. As a result of this approach, the efficiency of the parts-information sharing is improved significantly.     

一种三自由度串并联结构旋转台的动力学分析

对三自由度旋转台进行了动力学分析。该旋转台只有3个方向的转动自由度,由二自由度球面并联机构和串联在其上的旋转电机构成。根据旋转台的几何和运动特性建立了系统的输入输出速度方程,得出了速度Jacobian矩阵和动能方程。利用拉格朗日法和虚功原理,建立了系统的动力学模型,解决了特定外载荷和速度、加速度条件下如何求解驱动力矩的问题。给出了动力学的仿真运算实例,讨论了在匀速和匀加速情况下,二自由度球面并联机构驱动力矩的变化。最后根据动力学方程,得出了串联在二自由度球面并联机构上的第三个自由度的力矩与输出转角的运动学方程。     

基于虚拟试车场的轿车悬架耐久性强化试验仿真研究

汽车产品的耐久性是影响其竞争力的重要因素,同时其开发周期与成本迫切需要在产品概念设计阶段对其耐久性进行控制。针对轿车开发过程中传统悬架耐久性道路强化试验周期长费用高的缺点,以农安试车场各种耐久性强化路面为输入条件,应用虚拟试车场技术(Virtual proving ground,VPG)建立某轿车整车柔性虚拟试车场仿真模型,解决虚拟试车场技术运用中的轮胎模型、橡胶衬套刚度、路面模型和整车模型计算效率等关键技术,分析轿车悬架系统时间历程动应力响应,并与相同工况下的实车耐久性试验结果进行对比,仿真结果与测试结果时域和频域趋势基本一致,验证柔性虚拟试车场技术仿真的悬架系统动应力响应的有效性。在此基础上,实现开发过程中悬架系统耐久性的有效预报。     

基于三维偏差分析技术的尺寸公差设计应用

整车开发过程中需要完成成百上千个零件的公差设计,为达到设定的质量目标,高效准确的偏差分析控制成为公差设计中的重要环节。本文介绍了三维偏差分析采用的算法、虚拟样车偏差分析模型建立开发流程、尺寸项目开发中的公差分配设计方法;并结合国内自主开发项目多个实际案例,列举了关键区域三维偏差分析理论计算数值与实际生产数据置信度对比;证明可以通过建立了虚拟工程样车系统,完成车身装配的匹配优化、公差设计,可以减少为实现尺寸匹配而进行多轮物理螺钉车制造活动,节约项目开发时间和成本。