纸浆模塑在移动空调产品包装上的应用研究

研究以纸浆模塑结构为缓冲内包装材料,解决移动空调产品在运输、周转过程中的损坏,达到保护好产品的目的。对纸浆模塑的原材料中旧报纸与旧瓦楞纸的比例测试分析,并对模塑材料作为移动空调包装进行结构设计,通过跌落、堆码测试研究其是否符合要求。纸浆模塑作为移动空调的内包装缓冲可行,此材料的旧纸比例、结构壁厚及凸台高度等都是影响产品在运输过程中能否保护好产品的关键因素。纸浆模塑作为内缓冲结构材料环保且成本低廉,可以在各行业产品包装中大力推广。     

纸浆浓度混合控制算法研究

本文针对纸浆浓度系统具有大滞后,模型不确定的特点,设计了纸浆浓度混合控制系统。该设计方法利用变论域模糊控制方法和基于PSO的PID控制方法各自的优点,采用模糊软切换方法实现了两种控制器的选择,较好的保证了纸浆浓度的精确控制。运行结果表明,该方法简单方便,对纸浆浓度控制系统进行了控制,取得了满意的控制效果。     

UG软件在系列化阀门产品设计中的应用

设计人中利用UG软件对阀门产品进行建立几何模型、参数化设计、有限元分析、机构分析和重量计算,从而提高了产品的设计水平,节约了大量的原材料,提高了企业的经济效益,同时体现出UG软件的优点。     

基于快速原型技术的产品成型研究

从快速原型的原理出发对快速原型技术的数据处理和工艺方法进行了分析和研究,并利用UG软件进行产品设计与开发,同时对产品模型进行功能分析,利用快速原型设备制作出产品的实体模型,在此基础上对产品设计方案进行了修改与设计评价。     

利用3DS MAX为SolidWorks制作产品动画

介绍了借助于AutoCAD 2000，利用3DS MAX为SolidWorks模型制作产品动画效果的具体步骤。     

基于反求工程产品框架模型的研制

为了使产品框架模型具有良好的尺寸参数和装配精度,在反求设计技术基础上,利用三维激光测量仪对砚有产品模型进行三维测量,运用CATIA软件对测量数据进行处理得产品横、纵截面轮廓尺寸并将其转化为CAD格式,应用相识理论确定产品框架模型的相似比和激光加工技术制作出产品模型零件并装配.实践表明,该产品框架模型具有精确零件尺寸精度和良好的装配性能,达到提高制作效率的目的.     

基于SimEvent的多产品多阶段看板生产系统设计与分析

为了确定多产品多阶段看板生产系统中的看板数量,提出一种事件驱动的建模仿真方法。根据看板生产系统看板、物料的流转特点,采用SimEvent工具的基本元素,建立了多产品多阶段看板生产系统的基本工序单元、原材料供应以及在制品与看板的流转模型;采用实体预载技术,在仿真初始为各工序配置指定数量的领用看板和生产看板;利用实体属性值实现了仿真过程不同类型实体的识别与流转调度。建立了一个多产品多阶段看板生产系统的SimEvent实例模型,仿真结果表明,该模型可以为两种类型的看板数设置提供决策支持。     

黄铜阀门低铜材料的研制

叙述了含铜低的ZHFe 58-1.5-1-0.4黄铜代替ZHAl 67-2.5铝黄铜制作阀门材料。新合金的材质致密,产品气孔率显著下降,机械性能、工艺性能、色泽等都符合制作阀门的要求。节省原材料、降低成本,经济效益显著。     

基于改进BP神经网络的纸浆漂白MIMO软测量模型研究

针对漂白过程中纸浆白度、残氯在线测量的不足,提出基于BP改进算法的神经网络软测量模型。文章介绍了基于神经网络的软测量技术原理以及漂白软测量模型建立的步骤与方法,给出了该模型的仿真结果。仿真结果表明,该模型具有较高精度和准确性,为纸浆质量的评判和优化控制提供了指导作用。     

浅谈型钢替代钢板制作小车架的优点

随着国内原材料价格的不断上涨，人力成本的不断提高，小车架的制作成本也随之增加，如何在设计方法和制造工艺上来改进产品是一个很值得探讨的为话题。用型钢替代钢板制作小车架可以解决。一些问题，带来的多个优点。     

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.     

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.     

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.     

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...