基于协同管理的单件小批生产管理系统的实现

本文针对多品种小批量生产的特点,讨论了某制造企业在生产计划编制、动态生产调度、资源受限、生产执行情况反馈等方面存在的问题,在深入分析了生产计划、生产调度和多资源(工艺、物料、工装、设备、人员等)约束等有关的生产管理流程的基础上,提出了生产管理业务模型、数据模型和多资源生产调度机制,采用J2EE多层体系架构和构件开发技术,提供了生产任务管理、生产计划编制、动态生产调度、生产资源平衡配置和计划调整追踪等功能.该系统在纵向上集成了ERP和MES的部分功能,同时提供与PCS的接口,横向上提供与CAPP和PDM的接口,具有良好的扩展性,服务于实际生产,实现了生产过程的分级管理和协同共享.     

制造业生产调度体系的研究

面对客户随机需求,制造业生产调度系统应促进生产的快速性、动态性和敏捷性.以制造业生产调度体系为研究对象,从生产车间调度的目标、方法、手段、资源等基本要素入手,总结了传统生产调度系统在实际生产中的问题,并概括了系统集成视角下的生产调度方法.运用系统集成的思想,探讨了供需链环境下的制造业生产调度系统模式,最终提出了生产调度系统的集成化、动态化、高效智能化、柔性化和排程可视化等发展方向.     

汽车工业与装备工业的协同发展联合创新

当前,汽车生产呈现出四个方面的特点:一是生产的多品种、系列化、混流生产;二是大批量集中生产:三是生产的车辆换型快,车型的平均生产寿命缩短;四是新产品的生产准备周期缩短,投放市场的进度加快.要适应汽车工业的生产特征,汽车生产与装备技术的关系体现在三个方面.第一,装备是汽车生产的工艺手段,汽车的制造水平和质量,取决于装备的技术水平.     

汽车零部件实施绿色生产的物流模式

研究了绿色生产物流的内涵,包括基本内涵和战略内涵。针对汽车零部件企业生产物流的特点,从生产物流各个环节的绿色化以及生产物流系统的绿色优化、管理、控制、评估等方面探讨了汽车零部件企业实施绿色生产物流的主要途径。提出了一种汽车零部件企业实施绿色生产物流的模式,该模式基于产品数据管理PDM,研究了生产物流的绿色规划模块、绿色控制模块和环境影响评估模块,以及绿色生产物流数据库系统;其在生产物流中的应用对推动我国汽车零部件企业车间生产的自动化、信息化进程具有重大意义。     

面向规模化生产的小尺寸产品总装生产线技术研究

为满足新时期航天产品规模化生产任务需求,提升航天产品总装安全生产水平,针对航天产品手工为主作业的传统生产模式开展生产线建模仿真、物料齐套及配送管理、柔性工装设计等技术研究,创新生产模式,结合某小尺寸产品构建面向规模化生产的总装生产线,满足安全生产要求,显著提高航天产品总装生产的自动化、数字化、智能化水平。     

制造业生产调度体系探讨

论文以制造业生产调度体系为研究对象,从生产车间调度的目标、方法、手段、资源等基本要素入手,总结了传统生产调度系统在实际生产中的问题,并概括了系统集成视角下的生产调度方法及其改进措施,介绍了不确定条件下生产调度策略及评价指标;运用系统集成的思想,探讨了供需链环境下的制造业生产调度系统模式,最终提出了生产调度系统的集成化、动态化、高效智能化、柔性化和排程可视化等发展方向。     

冲压车间制造执行系统的设计与研究

多品种、小批量的冲压产品生产管理比较复杂,一直困扰着生产管理者。根据多品种、小批量冲压产品生产特点,对满足其要求的制造执行系统进行了分析,构建了制造执行系统层次结构,设计其功能。该系统不仅能够完成对生产的管理、分析及数据的可视化展现,并能够对生产现场状态跟踪、生产效率与模具寿命的预测。通过企业的实际应用,验证了该系统能够很好地满足多品种、小批量冲压产品生产车间管理,提高生产效益。     

油田生产指挥中心软件架构设计与实现分析

为实现大庆油田"数字油田、智能油田、智慧油田"三步走战略部署,促进油田管理提升,助力油田稳健发展,设计并实现了大庆油田生产指挥中心软件平台.该平台主要包括可视化综合展示平台、数字化生产管理平台和生产指挥移动端平台,实现了生产动态、产能运行、生产管理、生产保障、运行监控、报警预警、调度运行、应急管理、万物共享9大功能模块...     

生产计划与调度系统在卷烟生产中的应用

针对企业计划层和生产控制层之间的断层问题,阐述了制造执行系统(Manufacturing Execution System)在烟草行业的应用,并就其中关键模块-生产计划与调度系统进行了详细介绍,包括制丝生产计划制定、卷包生产计划制定、生产通知单派发、制丝生产过程控制、卷包生产过程控制等功能模块,并对系统的实现和应用效果进行了介绍.     

多品种跨批量企业混合布局方式下的精益配送模型研究

多品种跨批量企业生产具有产品品种繁多、工艺复杂、产量多变等特点,缺乏拉动式准时生产的条件,在生产过程中容易存在半成品大量积压、产品生产周期过长等问题。针对这一问题,介绍一种不同于拉动式生产的工位物料的准时配送方法,利用混合布局方式,结合几个精益配送技术模块,提出了多品种跨批量企业的精益生产物料配送模型,使生产时的原材料和半成品在工位间高效流转,缩短产品生产周期,提高生产效率。     

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.     

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.     

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.     

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。     

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.     

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...