飞机自动驾驶系统原型开发方法研究

飞机自动驾驶系统是一种安全性和可靠性要求极高的复杂实时控制系统,在开发这种控制系统软件之前必须使用原型开发方法对一些相关的重要问题进行模拟研究。本文对一种高级原型语言和原型开发环境进行描述,对自动驾驶系统原型的开发方法和开发过程等方面的研究内容进行讨论。     

压铸中使用并行工程及快速制样技术

介绍了并行工程和快速制样技术在压铸工业中的应用 ,并对我国推广应用这两种先进技术提出了建议     

Rapid vessel prototyping: vascular modeling using 3t magnetic resonance angiography and rapid prototyping technology

Object Conversion of thoracic aortic vasculature as measured by Magnetic Resonance Imaging into a real physical replica. Materials and methods Several procedural steps including data acquisition with contrast enhanced MR Angiography at 3T, data visualization and 3D computer model generation, as well as rapid prototyping were used to construct an in-vitro model of the vessel geometry. Results A rapid vessel prototyping process was implemented and used to convert complex vascular geometry of the entire thoracic aorta and major branching arteries into a real physical replica with large anatomical coverage and high spatial resolution. Conclusion Rapid vessel prototyping permits the creation of a concrete solid replica of a patient’s vascular anatomy Parts of this work were presented at the ESMRMB 2005     

Bridging the gap between analysis and design: improving existing driver interfaces with tools from the framework of cognitive work analysis

Two studies of train driving are presented, both within the framework of cognitive work analysis. In the first study, the modelling tool abstraction–decomposition space is adapted to routine conditions, making the analysis more representative for normal procedures. A major contribution to these analyses was the use of the method for ‘collegial verbalisation’. One particular advantage with this method over other verbalisation methods is that it supplies the analysts with data that contain much more information, but not at the expense of being more subjective. On the contrary, this method produces think-aloud protocols from video-recordings that do not have to be interpreted by the researcher. From these analyses, it was possible to distinguish information that is an intrinsic part of the train driver task from information that is dependent on the configuration and design of the current support system. The analyses show that the driver works in three rather separate time intervals with a long-range, a short-term and an immediate sense of perspective. The driver switches between these while travelling between two stations. Based on these behaviour-shaping constraints, a prototype of a planning area of a driver interface was developed, making feed-forward planning possible for the driver. Four design iterations were completed, using a user-centred system design (UCSD) approach. Early tests show that the planning area of the interface supports the feed-forward decision strategy used by drivers who prefer an active driving style. However, the driver group also made substantial changes in the design, indicating that UCSD is an efficient tool in order to capture user competencies, and to bridge the gap between analysis and design.     

虚拟样机产品信息集成技术研究与应用

在虚拟样机技术实施过程中,CAD模型信息的集成与管理一直是一个瓶颈问题。在分析现有虚拟样机产品信息集成方案的基础上,采用了CAD二次开发技术进行信息提取,并基于XML进行信息集成,为虚拟样机产品信息集成提供了一条实现途径。     

数字化样机技术与新型织机的研发

介绍数字化样机技术的发展及其在新型织机研发中的应用。从数字化样机技术的概念及特点出发,介绍了数字化样机技术在国内外的发展、应用现状以及当前主流数字化设计商业软件。分析了我国当前织机的研发现状,指出了我国织机系统的全数字化开发面临的关键问题和技术难点,列举了国内针对织机整机系统的数字化样机研究平台。认为:数字化技术为纺织工业引入了全新的研发模式,是未来纺织机械发展的必然趋势。     

RE与RP技术在模具行业中的应用

介绍了RE与RP两种技术及其特点,在此基础上分析了RE与RP在模具行业中的各种应用情况。     

Design and Manufacturing of Integrated Drilling and Cutting Orthopedic Bone-Specific Surgical Guide

In this paper, the design and fabrication of a bone-specific double function surgical guide are presented. The design of this surgical guide is performed so that it can be used simultaneously for drilling and cutting of cow's tibia bone. The employment of this surgical guide results in higher accuracy, reduction of the number of the holes needed to be pierced through the bone, and lower surgery time. The research is performed in three steps including the digitizing of the bone and production of the bone's 3D model in CATIA (generative shape design environment), design of surgical guide, and fabrication of the guide by FDM process. The guide is used for drilling and cutting of the bone.     

新型陶瓷零件快速成型机铺料机构的研究

陶瓷零件快速成型机是基于层合速凝原理的,其成型工艺中浆料的填充和刮平过程十分重要。针对快速成型机的水平铺料机构,运用Workbench进行整机的有限元分析,得到工作状态下丝杠和导轨的变形,以及支撑板的变形与应力。通过ADAMS的动力学分析,得到料斗的速度和加速度曲线,以及丝杠和螺母,支撑板和导轨之间的受力情况。以此为基础,分析水平运动装置结构设计的合理性和可行性,以及在陶瓷零件成型过程中造成的影响,为尚处于设计阶段的结构的改进设计和精度提高提供了依据。     

基于分散网络的远程协同RP制造系统的研究与开发

根据动态联盟思想，利用先进的Web三层体系结构和组件式开发方法，提出一种快速进行RP／RT远程制造的新模式和框架，对其中的一些关键技术进行了研究，并开发了原型系统，以高效、分布、协同地进行RP制造。