大数据驱动的离散制造车间生产过程智能管控方法研究

在智能制造背景下,离散制造企业对利用大数据技术提高车间生产管控水平提出了迫切的需求。研究大数据驱动的离散制造车间生产过程智能管控方法,在明确离散制造车间特点与管控需求的基础上,分析了传统方法的局限性和大数据方法的优势,进而提出大数据驱动的离散制造车间生产过程管控总体框架,以制造大数据的"采集-处理-分析-服务"为主线开展研究。在"进度预测-瓶颈发现-异常溯源-智能决策"的生产过程闭环管控机制中,分别提出：基于堆叠稀疏自编码机的生产进度在线预测技术,基于平行门控循环单元的生产瓶颈漂移发现技术,基于密度峰值-模糊C均值的生产异常溯源分析技术和基于多智能体强化学习的生产过程智能决策技术。最后,以某航空企业典型离散制造车间作为对象,对所提出的大数据分析与智能决策方法进行了原型系统开发和应用验证。     

压铸设备运行实时监控系统研究及应用

针对压铸设备运行状态信息难以实时获取和生产过程管控力度薄弱等问题,结合套接字(socket)通信机制对压铸设备运行过程实时数据采集技术和数据处理技术进行了研究,构建了压铸设备实时监控系统的体系结构和功能结构,并基于Java语言设计和开发了一套压铸设备实时监控系统。该系统已成功应用于某企业压铸车间的生产现场,并取得了良好的效果。     

发电厂作业现场智能管控系统分析

基于发电厂作业现场的运行实际以及作业现场的复杂性,做好作业现场的监控对提高作业现场的安全管理水平具有重要意义。而目前影响发电厂作业现场安全管理的因素较多,传统的管控措施难以取得积极效果,使用智能管控系统不但能够解决传统管控系统的难点问题,同时还能实现24小时不间断的管控,对提高发电厂作业现场的安全管理水平以及解决发电厂作业现场安全管理问题具有重要影响。因此,在发电厂作业现场智能管控系统的应用过程中,需要掌握智能管控系统的核心竞争力,分析智能管控的功能和特点,为发电厂作业现场提供有力的管控系统支持。     

基于移动终端的机加车间生产质量信息实时管控支持系统

针对传统机加产品生产质量统计效率低、无法动态监控及有效预警等问题,建立了一种可与检测设备集成、支持生产质量动态监控与预警、基于移动终端的机加车间生产质量信息实时管控支持系统的体系结构,并对基于移动终端的车间质量动态监控与预警实现技术框架、移动终端软硬件架构及与检测设备的集成技术、基于移动终端的多点实时智能Elman神经网络预测模型及实现算法等关键技术进行了研究。该系统已成功应用于重庆市某制造企业,取得了良好的应用效果。     

基于西门子数控系统的机床加工过程监控系统设计

针对数字化车间及未来智能工厂的生产管控过程中,不能及时获取工业现场数控设备加工状态信息,导致数控设备在生产过程中的信息成了信息孤岛的问题,以西门子840Dsl数控系统为例,设计一种针对该类数控系统设备的实时监控系统。通过该监控系统在工业现场的应用,对过程中遇到的典型问题进行分析,并提出有效的解决方法。     

基于现场总线技术的DCS应用

随着现场总线技术的日益成熟,基于现场总线技术的DCS控制系统在化工装置应用越来越普遍,以20万吨/年产量的碳酸二苯酯装置控制系统的优化扩建为例,阐述基于艾默生DeltaV控制系统,广泛采用FF、Profibus DP现场总线技术智能执行设备、智能传感器、变送器等总线技术仪表组建碳酸二苯酯装置自动化系统的过程,并对现场总线控制技术应用的要求进行了说明和探讨。列举了基于工厂管控网技术的控制网结构,利用现场总线技术、OPC、工业以太网以及内嵌于控制系统的资产管理系统等技术,构建生产操作、设备状态监控、资产管理、经营及市场管理一体化工厂的全过程。     

工厂管控网在SECCO的应用

现代自动控制技术、计算机、通信、网络、信息技术的飞速发展,促进了以自动化系统为基础的企业网络信息系统的完善.基于现场总线结构的工厂管控网(PlantWeb)就是顺应这一形势发展起来的综合技术,其中现场总线被誉为自动化领域的计算机局域网.该技术正推动工业自动化控制向一个全新的领域发展,为企业生产控制和经营管理提供更多优化方案.并介绍其在SECCO的成功应用.     

基于移动终端的网络化外协加工物流信息实时管控方法及系统

针对网络化外协加工中主机厂对外协零部件物流信息的控制力度薄弱、与外协企业间的业务协同性不强等问题,提出一种基于智能移动终端的网络化外协加工物流信息实时管控方法及系统。阐释了该方法实现的总体思路,构建了该系统的体系结构、功能结构,研究了基于Web服务的外协加工物流实时管控业务流程描述模型和智能移动终端混合定位数据采集等关键技术。将以上研究成果在一个委外企业中进行了实际运用,取得了良好的应用效果。     

基于数字孪生的智能车间管控

针对目前智能车间存在的管理效率低、精准决策难等问题,设计了基于数字孪生智能车间的体系架构,开展了智能车间管控平台应用建设,提出了实时汇数据、智能找问题、精准做决策的生产管控设计理念,解决了数据多端多维度展示、三维场景联动、KPI看板监控业务管理、实时在线异常报警等问题。最后以企业刀具环节基于数字孪生智能车间应用为案例,展开数字孪生技术在智能车间管控平台的实践验证。     

实耐固精彩亮相AMTS,创先推出智能焊钳概念和产品

<正>2019年7月3日,北京实耐固连接技术有限公司(SNG)在上海举行了全新品牌形象及智能焊钳系统新闻发布会,并重磅推出了基于工业4.0理念全新设计开发的智能焊钳及SCADA 监控系统。实耐固副总经理乐君浩先生、研发总监任征博士出席了发布会,与行业媒体记者们分享了实耐固的最新进展和研发成果。当前,中国正处于传统工业向智能制造转型的关键时期,对于制造业企业,通过嵌入装备中对生产过程关键参数具有感知能力的芯片传感器系统实时精准采集生产数据,     

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.     

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....     

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。     

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.