高性能风洞颤振模型的性能精确制造研究

复合材料结构相似风洞颤振模型是一种先进的颤振模型结构形式,对于新一代飞机研制所必经的风洞颤振试验有重要意义。对于先进的风洞颤振模型,其模型外形几何参数以及整体刚度、刚度分布、整体质量、质量分布等特征参数均有较高的精确性要求,加之复合材料性能组成复杂,加工性能较差,传统制造方法不能实现对于该类产品的性能参数的精确保证,因此需要新的制造方法。针对复合材料结构相似风洞颤振模型的制造难题,利用复合材料的力学性能可设计性,实现对于颤振模型性能参数的精确保证,并提出了一种针对模型性能参数的精确制造方法。以此方法制造了一系列机翼,尾翼颤振模型。工程实践证明,该方法可以有效保证颤振模型的几何与性能特征参数的精确性。     

基于Web的可重构制造资源优化配置平台研究

针对网络化制造中的资源动态快速重组问题，提出了基于物理制造单元的制造资源信息建模，以该模型建立了网络化、分布式制造资源库；研究了面向CAPP的制造资源预配置及其实现方法；研究了以时间、质量、成本为约束的制造资源优化配置及其实现方法。     

面向网络化制造的异地制造场所建模研究

针对面向网络化制造核心技术的远程制造资源的建模和仿真,本文探讨了网络化制造系统的结构,提出了两层的网络化制造资源信息模型,着重分析了任务驱动的网络化制造模式下分布式制造场所和设备的远程建模、仿真和组建方法,采用B/S结构来实现远程制造资源的VRML建模及EAI控制,建立了相应的资源模型。     

An efficient resource-searching method in manufacturing grid

The manufacturing grid (MG) is the next generation of networked manufacturing. In the manufacturing grid, how to find the best manufacturing resource for the task is especially important because the quantity and the types of resources are numerous. Exhaustive searching method, centralized searching method, and routing transfer method are three typical resource-searching methods in the traditional networked manufacturing system. In order to improve the efficiency of searching for resources in the manufacturing grid, a hierarchy-searching model is built, and accordingly, the algorithm is proposed based on analyzing the limitation of the traditional resource-searching method applied into the manufacturing grid. It is verified that the model and the algorithm are efficient by comparing with the other three typical resource-searching methods.     

Developing a manufacturing technology for the components made of a multiphase perfect material

A component made up of a perfect combination of different materials (most often including homogeneous materials and three different types of heterogeneous materials, i.e., composite materials, functionally graded materials, and heterogeneous materials with a periodic microstructure) in its different portions for a specific application is considered to be a component made of a multiphase perfect material. To design and represent such components, a corresponding computer-aided design method and a CAD modeling method have been developed. Although, there is no existing manufacturing method and facility for such components. Their fabrication entails four steps described in this paper: analysis of the requirements of their manufacture; review of the currently available layered manufacturing, micro-fabrications, and hybrid manufacturing technologies; presentation of a new hybrid layered manufacturing technology (including its manufacturing process and the principle scheme of its corresponding manufacturing facilities); and implementation of the manufacturing simulation by means of virtual manufacturing technology.     

火炸药的绿色制造过程评价

为了对直接的制造过程进行评价，提出一种基于对生产过程的状态空间描述的面向过程的绿色制造过程评价体系。从加工对象状态转换的角度考察加工过程的方法，本身具有层次性及层次间的自相似性的特点，在此基础上建立了对生产过程的绿色评价体系。这一评价体系适应火药柔性化生产的多品种、小批量、连续化的生产方式，为企业全面、细致、多角度考察产品制造过程绿色度、实行绿色制造提供了有力的工具。     

Evaluating the flexibility in a manufacturing system using fuzzy multi-attribute group decision-making with multi-granularity linguistic information

Evaluation of flexibility in a manufacturing system development in operations management is important to determine the competitiveness of manufacturing system, and is being increasing discussed in the literature on manufacturing system. This paper presents a fuzzy group decision-making model with different linguistic term sets (multi-granularity linguistic term sets) for evaluating manufacturing flexibility development, where the performance rating of manufacturing systems under flexibility metrics and the importance grade of all flexibility dimensions are assessed in linguistic terms represented by trapezoidal fuzzy numbers. The linguistic term sets chosen by decision-makers will have more or less terms. This paper proposes a procedure to assess the degree of manufacturing flexibility in a fuzzy environment by a fuzzy fusion method of linguistic information. While evaluating the degree of manufacturing flexibility, one may find the need for improving manufacturing flexibility, and determine the dimensions of manufacturing flexibility as the best direction to improvement. Example using a case of leading Taiwan firm in the bicycle industry is used to illustrate the computational process of the proposed method.     

面向对象模型量化评价方法

虚拟制造系统建模主要采用面向对象分析与设计方法,其模型是十分复杂的,在虚拟制造系统面向对象模型设计的基础上,引入一种面向对象模型量化评价方法,以便更科学地评估虚拟制造系统面向对象模型的复杂度。     

基于信息熵的制造服务单元建模与定量评估方法研究

为评估制造服务协同中制造服务单元划分的合理性,提出了基于信息熵的制造服务单元建模与定量评估方法。阐述了制造服务协同过程,提出了制造服务单元模型。基于Shannon信息论,结合制造服务单元信息容量和制造特征标识码的相关性,建立了制造服务单元评估的定量方法。实例证明,该方法可有效地减少制造服务链的信息冗余,优化制造服务协同过程。     

网络化制造资源集成研究

对网络化制造资源集成的内涵以及其与传统资源集成进行了比较研究。对网络化制造资源集成进行了系统研究；从层次分析的角度建立了网络化制造资源集成框架；对制造资源进行描述，提出了制造资源信息建模方法；给出了制造资源集成宏观数学模型并对其进行分析，提出提升制造资源集成系统的核心能力应采取的宏观措施。     

A clustering-based modeling scheme of the manufacturing resources for process planning

Process planning determines how a product is to be manufactured and, therefore, is one of the key elements in the manufacturing process. The basic crux of computer-aided process planning (CAPP), however, is the diversity of manufacturing background and the complexity of process planning. Since the process plans are generated on demand with the manufacturing resources on a shop floor, modeling method of the manufacturing resources is one of most important issues in computer-aided process planning. Hence, the major objective of this research is to create a clustering-based modeling scheme of the manufacturing resources for process planning. This modeling scheme combines clustering method with averaging method so as to reasonably partition and classify the manufacturing resources on a shop floor. The proposed approach provides one of search strategies of machine tools for process planning, especially for the selection of machine tools. Finally, an illustrative example is applied to describe the clustering-based modeling scheme.     

制造系统可靠性分析的框架与动力学机制

制造系统可靠性的研究已有几十年的历史,但相关研究所界定的研究范畴模糊,缺乏统一的分析框架,容易与传统的设备系统可靠性研究发生混淆。在文献研究的基础上,对制造系统的定义和内涵进行分析,并据此重新阐释制造系统性能与可靠性概念之间的区别和联系。从设备-工艺孪生的角度重新定义制造系统的概念,并指出在制造系统可靠性研究中忽视系统中人的作用的制造系统描述是不完备的。基于功能视角,重新定义了制造系统失效模式,建立制造系统可靠性分析的框架,阐述制造系统可靠性随时间变化机制的研究方法。研究指出大数据方法将是未来制造系统可靠性研究的重要方法之一。     

基于自适应蚁群算法的工艺路线优化

针对计算机辅助工艺设计中最优方案选择,提出一种以制造资源更换率最低为目标的自适应蚁群优化方法(Adaptive ant colony algorithm,AACA)。通过分析零件特征,根据精度要求对制造特征进行分解,提出加工元概念。加工元被定义为特定的制造特征、加工阶段、加工方法、制造资源、装夹位置的集合,工艺路线的确定被转换为对加工元的优化顺序安排问题。以制造特征之间的几何位置约束,各加工阶段的先后顺序约束为基本元素,构造加工元优选约束矩阵,给出基于优选约束矩阵的加工元优选原则。在加工元优先顺序约束和可用制造资源的共同约束下,将缩短加工周期、提高加工质量和降低加工成本的综合目标表达为制造资源更换率最低,进行优化目标函数的数学建模。指出加工元优化排序可类比旅行商问题,并选择AACA进行优化求解。实例分析表明提出的方法可以可靠和有效地得到符合生产实际的工艺路线。     

Manufacturing process modelling using process specification language

The manufacturing process is one of the important processes in a product??s life cycle. The sharing of manufacturing process information among different functional application systems, such as process planning, manufacturing simulation, manufacturing execution and project management, has become difficult to implement due to the growing complexity of the manufacturing information of product, process, resource and plant. A unified representation of manufacturing process information for all applications can enable convenient integration between different application systems. The development of manufacturing-related ontology and the Process Specification Language (PSL) has provided a formal definition and structure of semantic concepts for the capture and the exchange of manufacturing information. This paper presents a manufacturing process information modelling method which builds a standard, complete and exact definition of manufacturing process data by applying current PSL specifications. New extensions of the concepts of the manufacturing process and the types of relationship for describing activities, materials and resources in a process are identified and developed. The completeness and adaptability of activity relation of the proposed manufacturing process information representation is verified using mathematical induction under a variety of complex manufacturing process situations. The ability of the modelling method in expressing complex process information is demonstrated by a machining process example.     

基于Web的可重构制造资源优化配置平台研究

针对网络化制造中的资源动态快速重组问题,提出了基于物理制造单元的制造资源信息建模,以该模型建立了网络化、分布式制造资源库;研究了面向CAPP的制造资源预配置及其实现方法;研究了以时间、质量、成本为约束的制造资源优化配置及其实现方法.     

基于特征的制造工艺资源建模与检索方法研究

为表达制造工艺资源特征层次结构、分类结构及资源对象关系,采用面向对象与特征建模技术构建了制造工艺资源特征模型,用特征映射技术描述零件结构特征与加工特征、加工特征与加工方法特征、加工方法与制造工艺资源特征的映射关系和模糊决策方法。研究了用工序特征描述工艺设计过程所对应的资源特征的集,并以形式化表示,提出了从制造工艺资源数据库中检索工序资源特征,以特征参数的相似性计算来检索与工序匹配的资源特征的检索算法。最后,将该方法应用于工艺设计中制造工艺资源特征与工序特征的匹配。     

面向制造网格的资源优化配置方法

时间、质量、成本和服务是影响现代制造企业竞争力的关键因素。为此，在制造网格中，需要设计一个合理高效的制造资源优化配置方法，从而为每个制造任务寻找到最适合的制造资源。在对网格制造资源优化配置过程中的一些概念进行形式化定义和描述的基础上，基于物理网络，详细论述了制造资源的网络结构模型及其性质；然后以此为基础，提出了应用逐步筛选的方法进行制造资源的优化配置，从而搜索出满足制造任务需求的T，Q，C，S性能指标的最佳制造资源。最后通过一个实例验证了此方法的正确性。     

RFID-based colored Petri net applied for quality monitoring in manufacturing system

Product quality is difficult to be traced and monitored in the distributed manufacturing network. This paper proposes and develops a new RFID-based CPN modeling method where the colored tokens are evolved to color-tagged tokens carrying the product information of real-time status. With this new real-time modeling method, the performance of manufacturing systems such as yield rate and throughput can be realized. In this paper, a case study has been conducted to examine the feasibility and effectiveness of the proposed method. The simulation results show that the new modeling method is able to complete the preliminary real-time quality status analysis of a manufacturing system so as to handle dynamic and stochastic manufacturing network effectively and enable decision making for process improvement.     

溶胶—凝胶法在塑料光学元件上的应用

溶胶—凝胶法是制备薄膜的一种独特的方法。它特别适宜于塑料光学元件。给出了制备的方法以及工艺要点。