服装计算机集成制造系统的信息集成方案

服装ＣＩＭＳ实现的关键在于信息集成．本文提出了一种服装ＣＩＭＳ的信息集成设计方案，具体地阐述了服装生产全过程的规划与控制的信息集成，以及服装ＣＩＭＳ各子系统信息集成的方法，同时还介绍了服装ＣＩＭＳ信息集成的核心支撑子系统──数据库系统的设计．     

Theoretical Analysis of Nano Displacement of Nanometer Precision Actuator and Its Application

The kind of micro-/nano-meter precision actuator in cludes a piezoelectric one, an electric deformation one, a magnetic deformation one, a mechanical one, and a mechanical and electrical one. This paper puts forw ard a mechanical and electrical step actuator of nanometer precision, which cons ists of a step motor of large fine-dividing number of step angle, shaft couplin gs, a decelerator of large decelerating ratio, a screw mechanism and a pole of U shape, and has the minimum step displacement of 10...     

展望21世纪的制造科学初探我国制造业的发展思路

阐述了现代制造业的发展历程、制造技术、制造系统和生产模式 在当今世界已经出现了 33种先进的制造系统和先进的制造模式 制造科学产生于人类的制造活动 ,随着以信息技术为代表的高技术逐步渗透、融合到制造中才形成了现代的制造科学 这是信息科学、管理科学、生命科学、材料科学与机械工程和制造实践的交叉、融汇、相互渗透、发展的结果 同时 ,还阐述了影响现代制造科学的 4个领域 ,还概述了我国制造业的现状以及与国外先进制造业的差距 ,最后展望了 2 1世纪的制造科学 ,提出了我国制造业的发展思路     

“虚工件”中刀具排列优化算法

针对柔性制造系统中一块托板上装夹几个相同或不同工件组成的一个实体——“虚工件”的工艺安排中的刀具排序问题,提出了一个新的算法.利用这一算法,可以很方便地从“虚工件”工艺安排的相同刀具中找出一个共用刀具数最多的序列,从而实现刀具排序最优化的目的.     

论市场道德观的两个极端──“滑坡”与“爬坡”──正确理解马克思的历史观与道德观

从分析市场道德观的两个极端——“滑坡”与“爬坡”入手,重点研究了如何正确理解马克思的历史现与道德现问题。     

A survey of the perturbation analysis of discrete event dynamic systems

This paper introduces an analysis and optimization technique for discrete event dynamic systems, such as flexible manufacturing systems (FMSs), and other discrete part production processes. It can also be used for enhancement of the simulation results of, or the monitoring of the operations of such systems in real time. Extensive references are given where readers may pursue futher details.     

并联机床铰链制造误差的补偿

为减小铰链制造误差,提高并联机床运动精度,以六自由度并联机床XNZ63为结构模型,分析了铰链的各种制造误差。利用Denavit-Hartenberg(D-H)方法,建立包含铰链制造误差的运动学方程,通过仿真计算得到工作空间内铰链制造误差对终端运动精度的影响规律。将铰链制造误差映射为驱动轴长度误差,并据此开发出误差实时补偿算法。仿真表明:在测量扰动为0.01mm时该算法仍可补偿约80%的误差影响,补偿每个位姿点仅耗时0.3ms左右,符合数控系统实时性要求,为含有同类铰链的并联机床提供了高效通用的铰链制造误差补偿算法。     

Organizing of Virtual Enterprise for Customized Artificial Joint and Scheduling of Manufacturing Resources Based on Manufacturing Grid

In order to improve efficiency of developing customized artificial joint, a virtual enterprise is organized based on the manufacturing grid. The application-oriented framework of the virtual enterprise is created for organization of the virtual enterprise. The manufacturing system of the virtual enterprise is built up based on the exterior grid and manufacturing subsystems of member enterprises are set up based on the interior grid. Furthermore, according to characteristic matching of manufacturing resources, the scheduling flow is studied in detail and the related scheduling strategies are established. The scheduling procedure is divided into distributed scheduling stage and local scheduling stage. Based on the manufacturing grid, the organization of the virtual enterprise for customized artificial joint and the corresponding scheduling strategies can be utilized to shorten developing cycle and reduce produce cost.     

Event-driven Dynamic and Intelligent Scheduling for Agile Manufacturing Based on Immune Mechanism and Expert System

Based on the biological immune concept, immune response mechanism and expert system, a dynamic and intelligent scheduling model toward the disturbance of the production such as machine fault, task insert and cancel etc. is proposed. The antibody generation method based on the sequence constraints and the coding rule of antibody for the machining procedure is also presented. Using the heuristic antibody generation method based on the physiology immune mechanism, the validity of the scheduling optimization is improved, and based on the immune and expert system under the event-driven constraints, not only Job-shop scheduling problem with multi-objective can be solved, but also the disturbance of the production be handled rapidly. A case of the job-shop scheduling is studied and dynamic optimal solutions with multi-objective function for agile manufacturing are obtained in this paper. And the event-driven dynamic rescheduling result is compared with right-shift rescheduling and total rescheduling.     

基于运动学的可重构方法及其应用

基于可重构机床的特点，用矩阵描述的方法建立机床组成模块的运动学模型；给出选择机床模块的标准；根据机床的结构特点及功能要求，由所选择的模块生成机床的所有拓扑结构；结合所给出的方法分析了多功能选择性激光烧结机的设计．研究表明，采用可重构的方法设计选择性激光烧结机，可以节约设计费用及制造费用．