基于WinCC Web Navigator的生产数据发布系统

本文阐述了以WinCC Web Navigator为工具,实现将生产现场实时数据发布到管理网络,集中调度、综合监控;为企业的管控一体化提供了一个基础平台.     

单机多车情形生产与配送协同调度算法

为实现拉动式供应链整体优势,研究了一类单机多车情形下的生产与配送协同优化调度问题,其中假定制造商生产部门采用单机模式,生产后由配送部门或第三方物流将多个订单任务分车配送给多个客户,同时考虑配送路径的优化。引入制造商信誉惩罚成本,并假定它与客户的收货时间成正比。调度的目标是协调生产与配送步调,使得制造商信誉惩罚成本与配送成本总和最小化,从而实现生产与配送的协同优化调度。对于此类NPhard问题建立了数学模型,分析了最优解应具备的特征,构建了模拟退火算法,并通过大量随机数据验证了所构造算法的性能。实验表明:所构造的模拟退火算法能够在合理的时间内提供高质量满意解,解的质量明显优于传统的生产与配送两阶段优化方法。     

军工企业的数字化机加/装配生产线改造

针对军工企业加工产品多品种、变批量、混线生产的特点,重点突破基于任务特性的生产智能调度、基于知识的机加、装配过程模拟与仿真、虚实融合的生成过程可视化监控等关键技术,建立多品种变批量混线生产数字化集成制造模式;结合先进的MES技术理念和系统建设方法,建立覆盖组成产品生产的零件机械加工、部件装配、总装总调等各环节的一体化数字生产线,实现资源全面整合、调度高度智能、数据实时采集、物料及时配送等,提升生产装配线的柔性和混线生产的敏捷性。     

垃圾站监控系统的设计与实现

介绍了以WinCC组态软件和西门子S7-200 Smart PLC等实现的垃圾站监控系统。基于OPC通信和数据库访问,实现了垃圾站的生产和调度监控,达到现场无人值守和远程监控的目的。     

RFID在箱体类柔性制造系统中的应用

本文介绍集成应用RFID、网络通信、WinCC、PLC编程等技术组成FMS1600精密箱体柔性制造系统物流自动化管理系统的设计方案、系统组态、电子标签读写、WinCC上位机系统与PLC控制器、RFID系统通信的实现。物流控制系统通过PROFIBUS-DP现场总线,实现了FMS系统托盘的自动识别、调度、存储、装卸,移动位置和MOBY工作状态监控功能。     

基于混合离散蝙蝠算法的跨工序协同调度问题

针对跨工序的生产与配送协同调度问题，构建了前工序单机批加工、后工序多产线逐订单加工，且工序之间采用自动引导车循环配送的协同调度模型。以最小化最大完工时间和后工序前的在制品等待时间为调度目标，设计了融合模拟退火算法与解串算法的混合离散蝙蝠算法，与改进的离散粒子群算法和Ullrich遗传算法相比，该算法能很好地减少后工序产线前的队列等待时间，缩短产品的生产周期。     

基于Emulate3D的某汽车总装线仿真

在汽车总装配过程中,库区配置和生产线的调度、排序对生产节拍起到至关重要的作用,以前通常采用手工计算来确定调度方案和生产节拍,其过程繁琐且只有在实际调试阶段才能验证是否合理,往往需要很长时间反复的修改和调试。现针对某汽车总装车间的PBS库区的调度和排序采用Emulate3D软件进行物流动态仿真,通过JScript语言进行控制程序的编写。对库区调度进行模拟并优化,验证库区大小、排序算法是否合理,从而指导实际生产,提高效率。     

散料库起重机无人化关键技术研究

在基础工业中,原料库区的起重机无人化和智能仓储管理建设,是推进基础工业智能工厂建设极具代表性的一项技术。结合实时三维重建技术及设备自动控制技术建立整套散料库起重机无人化系统,其中包括料堆实时建模、起重机精确定位、协同控制技术、智能调度以及起重机设备健康管理技术,去掉了天车驾驶员,减少了地面操作人员,改善了工人劳动环境,降低了劳动强度,通过标准化作业实现精准定位,并通过可视化及动态跟踪物料,提高了作业效率;通过优化物料存放、多起重机协同工作、上料间隙卸车、双车上线等技术,提高了极限工况下作业效率。利用信息流贯通,提高物流精准度;通过统一调度数据信息,贯通全流程生产计划优化,全方位提升了智能工厂的生产效率。     

不确定环境下的产业链生产与配送协同调度优化

为有效整合产业链内部资源,提升产业链竞争优势,对产业链生产与配送协同调度优化问题进行了研究,分析问题涉及的3个价值环节,建立其数学模型,并针对调度中存在的生产不确定性问题,进行模型的不确定性补偿,在此基础上,提出一种基于随机模拟、模糊推理、神经网络、启发式算法融合的不确定规划最优化系统。基于该系统,对不确定规划中存在的随机性、并发性与模糊性进行拟合,并通过启发式寻优求解出不确定环境下产业链生产与配送协同调度问题的最优方案。通过对不同规模问题实例进行仿真实验,结果表明所构造的系统可较好地拟合调度过程中的不确定环境,在此基础上可得出适应性强的方案解,解的质量明显优于生产与配送协同调度遗传算法和生产与配送阶段优化算法。     

基于多Agent技术的信息资源配送系统模型研究

当今互联网技术和信息技术的不断发展,教育信息资源不断增加.本文提出一个基于多Agent的信息资源配送系统模型,改进了当前单一下载,网络超负载,缺乏调度机制,缺乏个性化资源挖掘等缺点,实现通过多个智能体相互通信、协商来最大效率的完成信息资源的配送.     

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...     

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.     

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。     

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。     

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。     

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.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

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.     

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.