轮胎生产过程MES系统研究与应用

首先分析了轮胎生产过程以及轮胎企业制造执行系统的特点,并结合制造执行系统的定义,提出了本系统的架构原理,接着从硬件和软件2个方面进一步阐述了系统的基本架构及实现系统需要考虑和解决的关键问题.最后从数据采集、质量管理、设备管理和生产调度4个主要模块详细地描述了系统实现的主要功能,并通过此系统实现了轮胎企业信息的综合化,提高了企业的竞争力.     

基于虚拟仪器的成型机监测及MES研究

针对轮胎制造业存在信息化程度偏低与监测实时性较差的问题,研发了轮胎成型机监测及制造执行系统(Manufacturing Execution System,MES)。基于虚拟仪器开发了轮胎成型机实时监测系统,实现了轮胎成型机的集成过程控制与系统层次控制,通过与美国罗克韦尔公司的MES相结合,为企业资源计划和过程控制系统之间建立了信息交互桥梁,实现了物料自动化运输、下发、投料防误等功能;基于标准粒子群算法优化调度方案,提高了生产效率。系统投入使用后证明,该系统鲁棒性良好,设备运行数据采集实时、准确,与制造执行系统之间高效集成,数据交互快捷、易行,生产效率高。     

基于UML的面向服务的纺织制造执行系统建模

结合纺织机械制造企业,提出面向服务的制造执行系统架构;根据架构提出基于UML的制造执行系统建模方法,建立系统的业务对象模型、服务交互模型等,实现了面向服务的制造执行系统的分析和设计.最后通过模型在系统平台开发中的应用验证了其可行性.     

基于OAGIS的制造执行系统的研究

制造执行系统作为联系企业上层计划系统和底层设备控制系统的纽带 ,在实现工厂综合自动化中起着重要的作用。本文针对制造执行系统存在的集成困难问题 ,就在制造执行系统的开发中应用OAGIS标准来提高制造执行系统的可集成性进行了研究 ,并以制造执行系统中的物料管理模块为例 ,描述了系统的架构和实现方法。     

选矿制造执行系统的研究与应用

制造执行系统是连接企业上层企业资源计划与底层过程控制系统的桥梁,是实现企业资源计划/制造执行系统/底层过程控制系统三层结构的流程工业计算机集成制造系统的关键。以酒泉钢铁公司选矿厂为背景,针对选矿生产过程特点,分析和探讨了选矿生产过程制造执行系统的体系结构和功能,提出了在网络、数据库等信息技术支持下的基于流程工业计算机集成制造系统的企业资源计划/制造执行系统/底层过程控制系统三层体系结构的制造执行系统结构,设计并实施了以计划调度和成本控制系统为核心的选矿制造执行系统,该系统成功地实现了选矿生产过程下层过程控制的实时信息和上层企业资源计划的信息融合和贯通,实现了信息流、物流和资金流的集成,取得了良好的经济效益和社会效益。     

面向生产过程云服务的制造执行系统

为支撑云制造服务模式在制造行业的推广应用,以及企业从传统生产型制造向服务型制造转型,在分析当前广大企业面向服务的生产制造过程管理需求的基础上,提出了下一代制造执行系统的发展方向——面向生产过程云服务的制造执行系统(CloudMES)。分析了CloudMES的总体实现思路,构建了一种CloudMES的体系架构和运行模式,并对CloudMES系统涉及的车间机床装备资源的智能感知与网络优化配置、基于移动智能体的机床装备资源服务化封装等关键技术进行了研究。通过初步试验验证了所提系统的有效性。     

装配流程可配置的制造执行系统的研究与应用

对传统制造执行系统的不足和可配置制造执行系统进行了研究,设计了装配流程配置过程的数据模型,提出装配流程配置的方法,根据背景企业的需求,介绍系统各模块的功能,对产品装配流程进行配置,设计了系统软件架构,并对系统进行了开发实现.本系统已在某军品装配分厂的再个装配车间进行了试用,效果良好.     

基于IE改善的MES研发

将工业工程改善技术融入制造执行系统,提出基于工业工程改善的制造执行系统的方法及其系统架构;并以某装备制造企业的生产车间为应用背景,在工业工程改善的基础上,开发其制造执行系统.     

面向服务的纺织机械制造执行系统研究

结合纺织机械制造企业实际情况,采用面向服务架构(SOA)的设计理念,提出基于Web服务的制造执行系统架构;探讨架构实现技术,实现系统内、外部的信息集成;最后通过系统平台的开发,验证架构的可行性。     

制丝线工艺与质量控制管理系统的研究与实现

论文结合烟草企业制造执行系统的实施．通过其中制丝线工艺与质量控制管理系统模块的研究和实现,提高企业生产和管理效率。通过对烟草行业制丝线的生产特点进行分析与归纳,研究了制丝线的工艺和质量控制关键方法,并针对烟草企业的应用,设计和实现了工艺与质量控制系统,将其作为烟草企业制造执行系统的一部分,通过实际应用验证了该系统的可行性和可靠性,为企业制造执行系统的实施,以及生产管理效率的提高提供了帮助,而且具有实际应用意义和一定的前瞻性。     

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...     

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.     

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.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.