面向半导体生产线生产计划的混合智能算法研究

针对传统半导体企业生产计划优化方法不能体现市场和生产环境中不确定性的不足,将模糊机会约束规划应用于半导体生产计划优化模型的建立,通过结合了模糊模拟和遗传算法的混合智能算法对半导体企业生产计划进行求解并通过实例及验证来说明该方法的可行性和有效性。     

半导体制造业生产计划的优化方法

半导体制造业中产品种类繁多,工序复杂,对设备的利用率要求较高,因而相对于其它制造业来说,生产计划的优化业较为复杂.文章讨论了目前半导体行业中常用的启发算法和基于线性规划的优化方法.     

制造联盟资源计划技术参考模型

企业集成平台的研究是一项复杂的系统工程,其基础是建立一套共同的企业集成平台框架模型。介绍了制造联盟资源计划技术参考模型的具体内容,并在此基础上简要介绍了制造联盟资源计划技术参考模型的一些应用。     

基于XML面向工艺设计的制造资源模型

随着网络化制造模式的实施，不同企业之间存在着大量异构信息的交互和共享，可扩展的标记语言技术为实现网络上环境异构信息的交互提供了解决方案。本文提出应用XML技术建立适用于网络化制造式面向工艺设计的制造资源模型的思想，并对实现该模型所涉及的关键技术和实现方法进行了研究，在此基础上建立了基于网络面向工艺设计的制造资源工具，作为一个主要的支撑模块，在RR－CAPP系统中得到了应用。     

Manufacturing Resource Planning Technology Based on Genetic Programming Simulation

Network-based manufacturing is a kind of distributed system, which enables manufacturers to finish production tasks as well as to grasp the opportunities in the market, even if manufacturing resources are insufficient. One of the main problems in network-based manufacturing is the allocation of resources and the assignment of tasks rationally, according to flexible resource distribution. The mapping rules and relations between production techniques and resources are proposed, followed by the definition of the resource unit. Ultimately, the genetic programming method for the optimization of the manufacturing system is put forward. A set of software for the optimization system of simulation process using genetic programming techniques has been developed, and the problems of manufacturing resource planning in network-based manufacturing are solved with the simulation of optimizing methods by genetic programming. The optimum proposal of hardware planning, selection of company and scheduling will be obtained in theory to help company managers in scientific decision-making.     

制造执行系统与企业资源计划的整合

介绍了MES的概念和功能模型,对制造业中计划层和执行层的信息系统进行了分析,从几个方面进行了对比,论述了二者的联系性;对MES／ERP的系统整合提出了一个整合方案。     

Process Planning Support System for Green Manufacturing and its application

Owing to a lack of practical methods and software tools in the existing researches on green manufacturing (GM), process planning support system for green manufacturing (GMPPSS) was developed to deal with the problems in optimization of environment-benign process planning. The GMPPSS consisted mainly of three function modules and related model repositories including: selection of process elements, optimization of process courses, and evaluation of process projects for GM. The database of the GMPPSS was used to provide plentiful information on resources consumption and environmental impact in manufacturing processes, which consisted of process attribute database, inventory database, machine database, tool database, and the cutting fluid database. Raw materials, secondary material consumption, energy consumption, and environment impacts of process planning were optimized to improve the green attribute of process planning of parts with the supports of the databases and model repositories. The gear processing in the machining tool factory was presented to verify the system’s applicability. __________ Translated from Computer Integrated Manufacturing System, 2005, 11(7): 975–980 [译自: 计算机集成制造系统]     

基于模型集的面向绿色制造工艺规划策略研究

分析了制造过程的输入，输出，揭示了面向绿色制造工艺规划的内涵，建立了面向绿色制造的工艺规划多目标优化决策总体模型，通过对该模型的分解，构造出面向绿色制造的工艺规划模型集，基于研究建立了一种基于模型集的面向绿色制造工艺规划策略，并开发了相应的面向绿色制造工艺规划的应用支持原型系统。     

面向可重构制造系统的工艺规划方法研究

提出一种面向可重构制造系统的工艺规划方法,首先,分析影响工序组合的相关属性,并通过编码的方法使其数值化,建立可将整个零件族内具有一定相似性的工序进行组合的数学模型及算法;然后,建立工序组合评价指标体系,采用多级模糊综合评价方法对其进行综合评价。通过实例表明,该方法可以得到零件族内最佳的工序组合方案,并显著地减少系统重构次数,缩小重构范围。     

Holonic Concept Based Methodology for Part Routeing on Flexible Manufacturing Systems

A flexible manufacturing system (FMS) is designed to achieve good productivity and low cost. The success of an FMS depends largely on effective production scheduling and control. However, it has been found that current manufacturing scheduling and control algorithms lack the flexibility to handle interruptions or resource breakdowns; hence, system performance drops dramatically and abruptly when interruptions occur. This research develops a computer-simulation-based framework of FMS scheduling and control system using the holonic concept. This framework can maintain stability and flexibility while accommodating system disturbance, increase throughput, reduce part flow-time and work-in-process inventory, and balance workload among identical workstations. The significance of this research is the investigation of an innovative approach to revolutionary advances of control technologies for advanced manufacturing systems, and to the revitalisation of control and scheduling algorithms used by existing FMSs. A case study has been provided to substantiate the effectiveness of this proposed framework.     

资源约束下产品多项目双层计划与控制

针对具有多项目并存和资源有限特点的企业产品项目,应用数学描述方法形式化了计划与控制问题,建立了多项目双层计划与控制过程。该过程描述了项目层和阶段层两层计划间的交叉控制,以及产品项目中协同管理流程,为多项目控制提供了一定的理论基础。     

基于增量制造的再生骨支架制备路径规划方法

基于增量制造的再生骨支架制备方法在生物制造领域表现出巨大应用潜力,也越来越受到重视,其中制造路径规划方法直接影响到制备的支架的结构特点,在很大程度上决定了后期支架的细胞培养以及组织修复效果。目前典型的面向工业以及民用领域的增量制造工艺的路径规划方法不能完全适用于骨支架的制备,无法获得能够有效模拟细胞外基质结构特征的三维贯通结构。针对这一问题,提出一种面向生物增量挤出成形技术的再生骨支架制备路径规划方法,将材料成形过程中出现的尺寸变形的补偿融入到路径规划方法的设计中,能有效满足骨支架制备时对复杂外轮廓和梯度孔隙结构的需求。在此基础上,给出再生骨支架增量挤出成形系统的软件系统架构,实现方法及结果,并通过支架成形试验验证支架的性能,研究成果对自主开发生物增量制造装备具有重要价值和意义。     

面向复杂梯度材料模具等离子熔积制造的建模与轨迹规划

为满足复杂功能梯度材料（FGM）模具设计和制造的需求,提出了基于非均匀梯度源的体素建模和双数据模型驱动的轨迹规划新方法。双数据模型中的STL模型用于梯度源设计和几何轨迹生成,体素模型用于材料分布设计和FGM表征建立。通过几何轨迹离散和材料信息检索与融合,生成了熔积成形轨迹。新方法不仅具备多个局部复杂参考特征同时描述的能力,还使得成形轨迹兼具几何精确快速和材料分布复杂的特点。最后通过汽车翼子板模具实例验证了算法的有效性。     

A Generative Computer-Aided Process Planning System for Prismatic Components

This paper deals with design and development of a generative computer-aided process planning (CAPP) system for prismatic components and named PSG-CAPP. The proposed CAPP system has been divided into three modules. The first module is concerned with feature extraction. The second and third modules deal with planning the set-up, machine selection, cutting tool selection, cutting parameter selection, and generation of process plan sheet. The whole CAPP system is developed using Visual Basic 6.0 as front end and Oracle 7.3 as back end. The SolidWorks98 plus has been used for modelling, and feature extraction has been implemented using a program written in Visual Basic 6.0. The speciality of the developed CAPP system is that it is linked with the CAD module and it extracts the majority of features automatically prior to process planning. The developed CAPP system has been tested with aerospace components. The main feature of the proposed CAPP system is its ability to handle a variety of prismatic components and generate process plans for them. A case study has been included to highlight the potential of the CAPP system. ID="A1"Correspondance and offprint requests to: Professor P. V. Mohanram, Department of Mechanical Engineering, PSG College of Technology, Peelamedu, Coimbatore 641004, India. E-mail: msadaiah@yahoo.com