基于XML/OPC的ERP/MES/底层控制集成系统研究

实时的信息管理是电子化制造模式的需要。分析和描述了ERP/MES/底层控制集成系统的信息流,建立了基于XML的ERP/MES/OPC共享信息组织结构,提出了利用XML网关进行XML信息校验、数据过滤和转换的方法,构造了面向OPC开放式软控制技术的MES/底层控制模型,实现系统间的信息集成和控制集成。MES作为ERP和底层控制的桥梁,使以天、周、月、年为时间因子的ERP系统达到实时。最后给出了一个基于该技术的自动装配线实验应用系统。     

A rough set enhanced fuzzy approach to quality function deployment

Quality function deployment (QFD) provides a systematic methodology to assist companies in developing quality products that are able to satisfy customer needs. The house of quality (HOQ), as the first phase of QFD, plays the most important role in product development. Frequently, fuzzy numbers are used to quantify the vagueness of linguistic terms so as to facilitate subjective assessments in the HOQ. However, the issue concerning how to determine the boundary intervals of fuzzy numbers remains unresolved. This work proposes a novel approach based on rough set theory, and introduces two concepts called rough number and rough boundary interval to address this issue. A comparative case study presented in this work shows that the proposed approach has significant advantages compared to the prevailing fuzzy number based method in processing subjective linguistic assessments in QFD.     

Failure evaluation and the establishment of an improvement model for product data management introduced to enterprises

The efficient control of correct and consistent production information is becoming increasingly difficult due to keener global competition and shortening product life cycles. Total e-business is a solution to the urgent requirement for management and organization changes. Product data management (PDM) is an excellent strategy to introduce e-process and personnel reorganization. However, the performance of introducing the PDM system is usually unsatisfying, due to the impact upon personnel and the product flow. An approach of assessing personnel organization and process failure is proposed in this research in order to locate the factors and reasons that cause a failure for a critical decision reference of enterprises planning for the PDM structure and the product flow. A traditional enterprise that introduced the PDM system was taken as an example in this article to explain the application of the failure mode and effects analysis (FMEA) and quality function deployment (QFD) for an efficient introduction of the PDM system.     

PDM/ERP集成技术研究

主要论述了企业PDM和ERP的信息集成的必要性和集成框架 ,详细论述PDM/ERP集成的模式和实现方法。为企业的PDM和ERP集成提供了可借鉴的模式和方法     

MTO型中小企业ERP系统计划管理模块的一种实现方法

计划管理模块是企业资源规划 (ERP)中的一个重要模块。介绍订货生产型中小企业计划管理的现状 ,针对该类企业的特点提出了一个计划管理模块的模型 ,并通过实例进行了验证     

ERP发展进程中的数据迁移研究

总结了ERP(企业资源计划 )的发展进程 ,在此基础上指出数据迁移是ERP发展进程中的一项重要工作。针对现有数据迁移方法的不足 ,提出一种交互式数据迁移方法。该方法把数据迁移和数据清理紧密地结合在一起 ,不仅灵活、准确地完成了数据的迁移 ,还保证了数据迁移后新系统的数据质量 ,从而保证了ERP发展进程中历史数据的完整性     

基于ERP和GPRS的电力生产智能全方位巡检控制系统

针对目前高压输配电线路和设备监管措施较多,对巡线人员工作责任考核技术措施有效性较差的特点,提出了一种新的基于ERP和GPRS的电力生产智能全方位巡检控制系统,阐述了ERP管理模式,引入了ERP和GPRS技术,开发和实现了集巡线工作精确量化管理、巡检数据自动录入等功能于一体的电力生产智能全方位巡检控制系统.应用结果验证了...     

基于ERP的企业集成信息系统结构模型的研究

结合对世界知名的ERP软件的分析 ,提出了基于ERP的企业集成信息系统结构模型。ERP是随着生产的发展而不断发展演化的 ,ERP的发展趋势是和其它先进管理思想和信息技术的融合 ,以提高整个供应链管理的效率。     

采用QFD模糊评判方法的静电涂油机产品规划设计研究

通过对静电涂油产品市场特点的分析,提出基于产品的质量功能配置技术对静电涂油机进行设计制造,采用系统化、规范化的思想和方法,调查和分析顾客需求,应用模糊集理论的相关知识将其转换成静电涂油产品特征,使其能快速响应市场,完全满足客户需求。通过对静电涂油机的实例研究,证明基于质量功能配置(QFD)技术的模糊评判方法的有效性和合理性。     

基于QFD的质量屋技术在冰箱设计中的应用

质量功能配置(QFD)利用质量屋将顾客需求转变成产品设计及制造需求.着重阐述了质量屋的生成过程,并以某企业所生产冰箱的客户需求为例,建立了评价模型,并在质量屋中构造相关要素矩阵以定量地确定用户需求,最后对质量屋可能存在的问题进行了分析.     

基于模糊信息公理的产品功能需求优化方案选择

采用质量功能展开将顾客需求及重要度转化为产品功能需求及其重要度, 以信息公理为依据,选择信息量最小的功能需求配置方案。采用三角模糊数处理不确定性的质量功能展开信息,采用相对偏好关系分析进行质量功能展开计算,运用模糊信息公理计算定性功能需求的信息量。考虑功能需求间的非线性补偿关系,以总信息量最小化为目标建立0-1非线性规划模型。最后以某装载机功能需求方案规划为例,验证了所提出方法的有效性。     

客户协同设计中基于QTF的产品创新方案生成研究

综合运用质量功能展开、TRIZ和模糊DEA方法构建了客户协同设计产品创新方案生成过程框架模型,并给出其具体步骤;然后对其中的关键环节分别提出基于Web服务本体描述语言并按照概念型、规则型和实例型进行统一转换的方法,基于TRIZ工具的产品创新瓶颈问题求解方法及基于模糊DEA的产品创新方案评估模型;最后,以某型号电冰箱的产品创新方案生成过程为例,验证了提出方法的可行性和有效性。     

改进的质量功能配置在订单驱动产品开发中的应用

在客户需求、响应速度、开发风险等方面对面向大批量生产、大批量定制及面向订单的产品开发方式进行了比较。基于质量功能配置(QFD)方法适用性的分析，提出了对QFD方法进行改进以适应当前面向订单的产品开发模式，并对QFD方法的主要工具——质量屋，从内容和形式上进行了重构。以典型的订单驱动的产品开发——高压开关柜定制为例，用重构的质量屋来进行产品规划，能够快速、简便、准确地响应客户的个性化需求。     

望大特性与望小特性的质量损失与信噪比的关系

质量损失是由于产品的功能波动所造成的 ,损失大小可由质量函数确定 ,而此时产品功能的稳健性可由信噪比来衡量。因此 ,定量探讨二者之间的关系 ,对于正确应用田口技术 ,提高产品设计水平具有重要的意义。本文建立了二者之间的关系 ,并用实际事例进行了验证。同时基于统计技术理论证实了产品参数设计时信噪比越大 ,则在该参数水平下的产品功能越稳健     

A robust algorithm for a class of optimal control problems subject to regional stability constraints and disturbances

A robust globally convergent algorithm for solving the optimization control problem (OCP) in both state feedback controller and observation control system is investigated. Finding the OCP adjoint parameter for computing the optimal observer gain and feedback gain vectors are desired. First, the optimal control problem considering stability of degree constrains and disturbance that affects the dynamics of system is converted into a two-point boundary value problem (TPBVP). Then, we apply the He’s polynomials based on homotopy perturbation method (HPM) as an efficient method to find both optimal gains. The algorithm will be modified do decrease the number of iterations required to attain a desired control problem cost function. As a result lower computational complexity is required when compared with other state of the art methods. Applying the HPM makes the solution procedure become easier, simpler and more straightforward. In the proposed method the control problem can be solved with lower amplitudes of the input signal (control effort), comparing with analytical method. Lower control efforts may also help to avoid saturation effects, and to restrain the system to work within linear operating areas of the state space. On the other hand, there is a tradeoff between control effort and the degree of optimality obtained. For demonstrating the simplicity and efficiency of the proposed optimal control method, the algorithm is compared with a control architecture using the Kalman filter estimator and a controller gain designed by the Lyapunov’s second method.