面向制造过程的车间实时监控系统设计

针对某企业机械加工车间的生产特点和在车间监控方面存在的问题,在分析目前车间监控现状及离散企业车间数据类型的基础上,对制造过程车间实时监控系统进行了设计。通过对监控系统功能和业务流程设计以及采用多种采集方式相结合的形式,保证车间制造过程信息的全面性、实时性和准确性。通过此系统可以实现对现场生产过程中各种生产状态信息的采集与管理,并能够使制造过程实时数据直接到达生产监测和管理环节,有助于加强车间监控力度和改善车间生产的混乱无序性。     

面向数字孪生的车间运行三维实时监控系统

为解决自动化生产车间生产运行过程和生产信息实时可视化程度低、设备数据采集困难等问题,研究了数字孪生技术和OPC UA技术在车间三维实时可视化方面的应用。首先,以搭建数字孪生车间为基础,完成了三维实时监控系统总体框架的设计,并确定了其关键运行流程和技术路线。然后,对实现该系统的4项关键技术,即车间设备孪生体建模及虚拟车间的构建、基于OPC UA技术的车间多源异构数据采集和传输方式、虚实车间同步运行,以及生产加工数据的实时可视化进行了详细阐述。最后,通过设计开发了某印章生产线的三维实时监控系统,以实时数据驱动孪生车间运行的方式,完成了对物理车间生产过程在三维场景中全方位、任意距离的实时监控。并对采集的实时数据进行分析、处理和计算,实现了车间中设备使用率、产品合格率和库存状况等生产信息动态可视化,验证了该监控系统的可行性和有效性。     

含能材料生产车间实时三维可视化监控系统的研究与应用

针对含能材料生产车间缺乏合理的信息集成及显示的问题,从实时监控的需求出发,为车间提供实时、准确、高效的管控支持,开展对含能材料生产车间智能采集与数据融合技术、虚实融合三维可视化显示技术的研究,最终构建车间实时三维可视化监控系统,实现对生产过程的实时监控,显著提高车间的可视性、透明度、实时性和人机交互性。     

面向离散车间生产过程的三维可视化监控系统研究

针对传统车间监控方式落后、可视化程度低且实时性差的问题,设计一种面向离散车间生产过程的三维可视化监控系统.通过车间生产过程分析,确定系统的体系架构,明确系统的开发运行模式.对监控Agent构建、多源异构生产要素感知集成、实时信息数据处理和全参数虚拟车间建模技术进行研究.验证表明了该监控系统的有效性.     

面向数字孪生车间的三维可视化实时监控方法

针对数字孪生车间的实时可视化监控难题,提出一种基于实时信息的生产车间三维可视化监控方法。分析了数字孪生车间与三维可视化实时监控之间的关系,提出一种多层次的三维可视化监控模式和实时数据驱动的虚拟车间运行模式。在此基础上,对基于实时信息的生产车间三维可视化实时监控方法4个关键实现技术,即虚拟车间几何建模、车间实时数据管理、车间多层次三维可视化监控和车间状态看板构建方法等进行了详细阐述。设计并开发了原型系统,通过实例验证了所提方法的有效性。     

基于网络化制造的生产过程监控技术

通过介绍实时监控系统的一些基本概念和组态王应用软件，以及与生产监控相关的几个关键技术(包括DDE数据传输方式和用Winsock控件实现远程通信)，对生产车间实时监控系统进行了阐述和分析，并模拟运行了柔性生产线上的监控过程，基本实现了生产现场的实时在线监控，并使系统具有历史记录功能。     

离散型车间生产过程中的物料实时跟踪与管理

针对离散型车间生产过程中物料信息可追溯性和实时性差的问题,基于精益生产管理理念和数据实时采集技术,分析了车间生产过程物料转移过程,提出了基于RFID的数据采集方案,构建了系统的网络支撑体系结构,实现了一个面向生产过程的物料实时跟踪与管理系统。该系统由物料信息管理、物料状态跟踪、物料供应和消耗情况、在制品信息统计和产成品质量追踪五大模块组成,完成了对生产过程中物料信息的实时采集和跟踪管理,为车间管理人员提供了全面、实时的物料信息,从而保证相关人员及时、有效的组织和调整物料路径,最终达到物料的通畅,实现对车间生产过程中物料信息的有效管理。     

烟草物流中心数字化车间监控系统研究

针对烟草物流自动化车间生产过程监控不足导致车间生产效率不高、管控难度大的问题,研究了一种面向生产过程的可视化监控方法,该方法从实体设备、车间作业流程等多方面构建具有多层级映射规则的数字孪生车间功能模型,在此基础上,建立孪生数据映射逻辑模型,搭建基于S7协议的实时数据采集传输架构,驱动孪生模型同步运行,设计并开发了数字化车间监控系统。最后通过实例验证,表明此系统能够有效集成、融合车间生产数据,实现对车间作业全流程的有效监控。     

基于分层组网的车间漆包机实时监控系统

为实现漆包线生产实时集中监控,设计了一种基于分层组网的车间漆包机实时监控系统。RS485和CAN总线实现分层组网。多个RS485总线对单台设备控制组网,高速CAN总线实现车间6台设备组网。单台设备主控制器采用Dynamic C协作多任务方式实现对每个RS485总线按多任务并行访问。监控室采用MCGS组态软件设计整个系统监控软件。采用ZOPC服务的方式实现MCGS与CAN PCI板卡通信。该实时监控系统提供了整体监控和每台漆包机设备的详细监控窗口,实现了在车间监控室内对该车间6台漆包机生产参数的实时监控。测试证明,在数据刷新周期是500 ms条件下,系统满足企业对车间漆包机的集中实时监控需求。     

离散型制造车间作业计划的虚拟可视化仿真研究

基于生产调度系统与仿真控制理论,分析了调度系统GG-MES的数据模型与仿真软件Flexsim为平台实现车间作业计划可视化方法,提出了车间作业计划执行过程动态与静态并行的软件模块表示方法.其中,采用甘特图直观表示设备任务的排产结果及计划的静态执行过程,采用仿真系统实时可视化地描述计划执行的动态过程.将GG-MES生成的甘特图与Flexsim创建的仿真模型集成后达到并行工作的效果,可使管理人员通过实时甘特图对车间计划安排一目了然,通过实时的车间作业仿真,掌握生产运行过程     

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.