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解读并行集群渲染系统 总被引:1,自引:0,他引:1
强氧公司 《CAD/CAM与制造业信息化》2004,(10):55-59
一、从集群运算系统到集群渲染系统 当今PC工业快速发展,高性能PC系统与高端图形系统的差距日趋减小,过去在高端图形工作站上才可以完成的工作,现在大部分都可以用PC来完成.这种情况导致更大规模的基于PC工作站的动画制作系统产生. 从计算能力和可靠性来说,PC已经赶上甚至超过了图形工作站.依据著名的摩尔定律,PC的性能每一年半就会翻番,发展速度远远超过了工作站,就性能价格比来说,PC也占据绝对优势. 相似文献
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计算机技术的发展使三维动画创作领域产生了质的飞跃.人们可以通过计算机创作出各种三维造型并产生动画.目前,三维动画已经在影视界、广告、CAI教学、机械设计等领域发挥着不可替代的作用.以往,三维动画只能在昂贵的工作站中完成,随着Autodesk公司推出基于PC平台的3D Stdio三维动画软件,三维动画在PC机上生成成为可能.美国微软公司Windows的推出,引起了软件行业的一场革命.人们纷纷看好Windows平台,大量基于Win-dows平台的软件开始出现.3D Stdio是一套基于DOS平台的动画软件,随着时代的发展,越来越显得有些落 相似文献
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要实现对现代变压器特性试验仪的数据处理和分析,必须解决PC机和DSP的串行通信问题.文中介绍了基于VisualBasic6.0的DSP与PC机的串行通信,构建了两者的串行通信体系结构,并通过具体的实例给出了DSP与PC机之间串行通信的方法.结果表明,该方法简单有效、功能强大,方便地实现了PC机和DSP之间的通信,借鉴性高. 相似文献
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1 PCI-E的历史及发展历程 起初的总线.ISA(Industry Standard Architecture):最早的PC总线是IBM公司1981年在PC/XT电脑采用的系统总线,它基于8bit的8088处理器,被称为PC总线或者PC/XT总线.在1984年的时候,IBM推出基于16-bit Intel 80286处理器的PC/AT电脑,系统总线也相应地扩展为16bit,并被称呼为PC/AT总线.而为了开发与IBM PC兼容的外围设备,行业内便逐渐确立了以IBM PC总线规范为基础的ISA总线. 相似文献
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借助嵌入式模块化集成的无线数传模块,结合当今主流Pocket PC,利用eMbedded Visual Tools编程工具,实现了嵌入式Windows CE.NET 4.2系统下,Pocket PC 2003与C200多参数离子浓度分析仪设备间的无线数据通信与测控.阐述了两者间的通信程序设计和基于Pocket PC数控应用的意义,并给出了通信程序的部分源代码. 相似文献
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主要研究了基于PC机的面向结构健康主动监测系统的设计与实现.该系统是基于主动监测技术思想,利用PC机、高性能多功能I/O卡以及软件系统组合的形式实现的,具有输出任意波形的激励信号、高速连续数据采集、丰富多样的信号处理以及无线远程监测等功能.利用该系统并配以相应的外围设备,在PC机上即可方便地实现结构健康的在线实时监测. 相似文献
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使用PC集群实现了多通道视景仿真,在给用户带来较大的视野和强烈沉浸感的同时可以得到较高的性价比。针对基于PC集群多通道视景仿真系统的系统框架进行了研究,使用OSG三维图形渲染引擎,提出了一种基于投影变换的分屏方法,并应用于基于PC集群的多通道视景仿真系统。实验结果表明与旋转视锥体方法相比该方法改善了在通道交界处产生“偏折”的现象,能够灵活、简便地进行分屏,方便地达到扩大视野或获得更大的显示尺寸的目的,保持了视景仿真中多通道视景和交互的同步并保持了画面的流畅。 相似文献
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Hayong Shin Author Vitae Gustav J. Olling Author Vitae Author Vitae Bo H. Kim Author Vitae 《Computer aided design》2003,35(2):203-213
Since the early 1980s, CAPP has been expected to bridge the gap between CAD and CAM. Though numerous research works on CAPP have been reported, it is not easy to find a commercial CAPP system applicable to complicated objects with freeform shapes such as mold and die. The dependency on CAM system is holding one leg of CAPP, while the complexity of the solution space in freeform shape machining has a tight grip on the other. This paper exemplifies that these obstacles on the CAPP bridge can be overcome by the integration with CAM and by focusing on a specific application area. Major components of a staming die for the car body panel are manufactured by machining the raw stock castings, which are usually made by the lost foam casting process. Die pattern is the lost foam pattern made of Styrofoam for the raw stock casting. The industry trend is to build die patterns by CNC machining. In this paper, a highly specialized CAPP/CAM integrated system, called Generative Pattern Machining (GPM), for automatic tool paths generation to cut die pattern from the CAD model of the stamping die is described. The overall structure and the detailed steps of GPM are explained. GPM is being used by DaimlerChrysler pattern shop very successfully. 相似文献
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基于BP网络的连铸二次冷却控制 总被引:2,自引:0,他引:2
二次冷却是连铸工艺中极其重要的一个环节。传统的二次冷却控制往往造成铸坯在冷却过程中表面温度的波动较大,对于铸坯的表面及内部质量有着很大的影响。本文充分利用BP网结构简单和学习速度快的特点建立铸坯表面温度预测系统的模型,并利用现场数据进行仿真。仿真结果表明,本系统能够很好地辨析出二次冷却系统的模型,符合实际的需求。 相似文献
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低压铸造是目前广泛应用的铸造成型工艺。本文根据铝合金轮毂的铸造工艺要求,采用了前馈-模糊控制的算法实现低压铸造的压力跟踪,采用PI控制的方法实现轮毂低压铸造要求的稳态性能,并在此基础上进行了控制系统的应用研究。实践表明,所研究的控制系统不仅实现了压力跟踪阶段的误差在20mBar以内,而且在稳态阶段的压力波动也在20mBar以内。 相似文献
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《Knowledge》2000,13(4):225-234
A knowledge-based expert system at the discretion of casting product designers can be employed as a real-time expert advisor to assist product designers to achieve the correct casting design and select the most appropriate casting process for a given component. This paper proposes a rule-based expert system approach for casting process selection, and describes an ongoing rule prototype development. The system in its present development state consists of five interconnected levels each concerning a particular process selection parameter or group of parameters including alloy to be cast, casting geometric features, casting accuracy, production quantity and overall comparative costs. The system progressively evaluates the user's specifications against the capabilities of various casting processes and in each level selects the processes that satisfy the design parameters specified. The final comparative cost level compares the processes that have satisfied all the criteria in the previous levels and recommends the most economical option. 相似文献
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随着用工成本的不断提高,对工厂设备进行自动化改造和升级,提高工厂的信息化水平,已成为各级政府和企业关注的重点。设计一套基于STM32的压铸机数据采集系统,对模具条码、压铸机状态等进行采集,并将采集数据发送到上位机处理。应用表明,该系统实现了对压铸机数据的自动采集,有利于生产管理人员对生产进程进行管控。 相似文献
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介绍了基于变频技术的离心浇铸机控制系统的硬件系统构成和主要功能,给出了系统的控制思想和监控画面设计。针对离心浇铸机两驱动辊在运行过程中既要保持同步,又要保证两台电机的负荷平衡的问题,提出了一种基于变频器主从控制方式的双闭环控制系统。实践证明,该方法简单易行,解决了以往控制系统中负荷分配不均匀的问题。 相似文献
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Tony Mileman Brian Knight Miltos Petridis Don Cowell J. Ewer 《Journal of Intelligent Manufacturing》2002,13(1):39-45
This paper describes research into retrieval based on 3-dimensional shapes for use in the metal casting industry. The purpose of the system is to advise a casting engineer on the design aspects of a new casting by reference to similar castings which have been prototyped and tested in the past. The key aspects of the system are the orientation of the shape within the mould, the positions of feeders and chills, and particular advice concerning special problems and solutions, and possible redesign. The main focus of this research is the effectiveness of similarity measures based on 3-dimensional shapes. The approach adopted here is to construct similarity measures based on a graphical representation deriving from a shape decomposition used extensively by experienced casting design engineers. The paper explains the graphical representation and discusses similarity measures based on it. Performance measures for the CBR system are given, and the results for trials of the system are presented. The competence of the current case-base is discussed, with reference to a representation of cases as points in an n-dimensional feature space, and its principal components visualization. A refinement of the case base is performed as a result of the competence analysis and the performance of the case-base before and after refinement is compared. 相似文献
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黄晓红 《自动化与信息工程》2009,30(2):28-30
连铸连轧系统中的带钢热连轧计算机控制系统是钢铁业乃至所有工业控制系统中最复杂、技术含量最高的计算机控制系统之一。文章介绍了一种应用在珠钢项目上的薄板坯连铸连轧系统的计算机智能控制系统。 相似文献