日化行业MES系统研究与设计

制造执行系统(MES)是改善车间管理的重要信息化手段,但不同行业MES系统存在较大差异。针对当前日化行业生产管理存在的问题,提出了日化行业MES系统建设目标,设计出一种适用日化行业的MES系统架构,阐述了MES系统下的车间作业流程,并对软件功能模块进行了总体设计。对系统的应用情况进行了分析,并对系统发展进行了展望。     

叶片生产车间MES的研究与开发

提出了制造企业目前存在的一系列问题,以某叶片生产加工车间作为研究对象,开发了车间MES系统。介绍了该车间MES系统的系统模型、功能结构以及设备集成构架,并重点介绍了MES系统当中的精益生产模块,实现了精益生产与MES的融合,进一步提高了企业的生产效率。     

车身喷涂车间的MES系统分析与设计

针对汽车生产的喷涂车间存在的各种问题,结合MES系统的运行特点,分析喷涂车间的系统需求,阐述喷涂的工艺流程和业务流程.从体系架构、功能模块组成和其他软硬件的集成进行分析.从数据传输、现场监控和生产调度3个方面对系统关键技术进行设计,该系统有效地解决了车间生产和管理方面的问题,提高了车身喷涂作业效率.     

叶片生产车间精益制造执行系统的研究与开发

通过对叶片生产车间精益生产以及车间信息化的需求分析,提出了叶片生产车间精益制造执行系统(LMES)的建设。设计了该车间LMES系统的系统模型、LMES车间网络构架以及LMES的功能结构,开发出了叶片生产车间LMES原型系统,并重点论述了LMES系统当中的精益MES模块,最后介绍了LMES系统当中重要的工作界面。叶片生产车间LMES系统将精益生产思想合理地融入到MES当中,以合理优化分配车间资源,减少车间库存成本,提高制造执行系统(MES)的执行能力为目的,大大提高了车间的生产效率以及车间交货的准确性,从而实现车间的精益制造。     

MES系统在精密机械制造车间的应用

在产研混线的离散型机械加工车间应用了车间制造执行系统(MES)技术,对原有DNC系统进行了升级改造,并实施了数控机床监控MDC系统,开发了包括11个功能模块的MES系统软件,并与DNC、CAPP等系统进行了信息集成,解决了车间生产准备周期长、生产作业计划协调性差等问题,提高了设备利用率和生产管理效率,加快了新产品研制进度,缓解了重点型号的生产压力。     

基于MES的车间制造过程动态质量管理系统研究

针对车间制造工程质量管理的现状和不足,在研究制造执行系统(Manufacturing Execution System,MES)应用现状的基础上,提出和研究一种基于MES的车间制造过程动态质量管理系统,实现质量计划、质量实施、质量检查和质量处理四个阶段动态循环地执行.给出系统的体系结构,并对系统实现的部分关键技术进行研究.最后将该系统在一家企业进行了应用实践,取得了良好的应用效果.     

物联网在车间制造执行系统的技术实现

为了解决传统的生产制造模式出现的车间控制层和计划层之间出现的信息"断层"现象,提出了MES管理信息系统与物联网技术结合的思路。针对机加工车间等典型的离散类制造车间进行分析,给出具体的MES系统设计思路与框架,并利用RFID技术和Zig Bee技术具体设计出了制造车间物联网系统平台,最后利用Justep X5开发平台实现了MES系统与物联网技术的互联应用。     

基于APS与MES集成的车间生产计划和调度方法研究

介绍了APS和MES的基本概念，并在分析现行车间生产计划和调度方法的基础上，提出了基于APS和MES集成的车间生产计划和调度方法，同时研究了与APS和MES集成相关的系统架构和关键实现技术。     

挤压机的控制系统分析

随着制造业的快速发展,工业铝型材已被广泛的应用到各个高新产业,如航空、动车、船舶等。金属铝型材的成型工艺方法主要包含挤压、锻造、压延。根据挤压的成型工艺,重点阐述挤压机的控制系统。该套控制系统结合了PLC、MES、上位机四大系统,实现了生产工艺过程的在线智能化管理、可视化管理、过程控制、过程分析及产品的可追溯性。     

基于.NET开发平台的离散制造车间MES的设计与研究

传统的离散制造车间生产依赖若干独立的单一功能软件,由于缺乏有效的集成与数据共享,难以达到车间生产过程的总体优化。为了对车间生产过程进行集成化管理,提高产品的生产质量,缩短生产周期,需要对制造执行系统开展研究,并开发支撑车间生产的软件系统。该文针对某重型机械企业离散制造车间现存生产调度问题及管理弊端,设计了该离散制造车间的MES总体解决方案,基于.NET开发平台的VS开发环境,开发以生产计划调度和数据管理为核心的MES系统。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.