基于蓝牙和Windows CE.NET的数控系统编程和通信技术

提出了一种基于蓝牙技术和Windows CE.NET且适用于车间人机协同制造的新型数控系统。该系统分为移动控制器和机床控制器两部分,前者是基于智能手机的移动控制器,后者是基于WindowsCE.NET的嵌入式机床控制器,它们彼此通过蓝牙技术通信。详细介绍了该系统的体系结构和基于.NET Compact Framework的编程模型,阐述了蓝牙技术的通信机制及其实现,并给出了简单的研究结果。     

基于Windows CE的开放式数控系统设备驱动程序开发

讨论了基于WindowsCE．NET的开放式数控系统的一项关键技术。首先分析了WindowsCE．NET的系统结构，并详细阐述其中断原理，介绍如何修改内核和硬件抽象层安装中断服务例程。最后着重分析了基于WindowsCE．NET设备驱动程序的开发方法。     

采用无线通信技术的新型数控系统

移动通信技术和智能掌上设备的飞速发展及其在其他领域的广泛应用，必将对制造模式产生深刻的影响，为数字化制造带来重大的机遇和挑战。本文根据“基于移动通信技术的人机协同车间数字化制造模式”的要求，提出一种采用无线通信技术的新型数控系统。新型数控系统由两部分构成：一部分是可移动的掌上控制器，我们称其为数控PDA；另一部分则安装于机床上，称为嵌入式机床控制器。两部分之间通过W1-Fi(802．11X)或蓝牙(Bluetooth)实现通信。在这种模式下，现今的数控系统中的很大一部分功能将被转移到数控PDA上。而机床控制器则主要执行实时运动控制和PLC功能。这种新型数控是真正的嵌入式系统，大大降低了数控系统的体积和成本。新型数控系统的最大优势是能够方便地实现设备级的无线联网；同时，通过数控PDA也彻底改变了数控机床的操作模式，把以机器为中心改变为以人为中心，并实现一人多机操作。本文重点对新型数控的体系结构以及通信机制及其实现进行探讨。     

基于Web服务的移动控制数控系统关键技术研究

提出了基于Web服务的移动控制数控系统的概念,该系统由作为Web浏览器的移动控制器和作为Web服务器的设备控制器两部分构成,通过蓝牙无线通信技术进行信息交换,实现人机协同。研究了其硬件组成、体系结构和移动控制器的B/S和C/S两种工作模式。对运动控制器和CNC的集成统一接口标准进行了讨论,提出了版本空间的概念和缩小版本空间的方法。配置了蓝牙通信协议,进行了蓝牙通信的实验。研究结果为车间数字化制造设备的跨平台无缝集成和可重构提供了支持。     

基于Windows CE的开放式CNC系统研究

论述了开放式数控系统的特点和要求,在比较了WindowsCE与DOS、Windows和其他操作系统的各自优缺点后,提出了研制基于WindowsCE平台的开放式数控系统的构想,介绍了基于WindowsCE3.0开放式数控系统的体系结构。     

基于全软件数控系统的网络通信技术的研究

在分析了数控系统故障诊断的缺点基础上,提出了将无线网络技术应用于数控系统的新理念.研究了蓝牙技术的产生、发展以及蓝牙网络中的拓扑结构.针对蓝牙技术引入数控系统的目的、技术方案、实现构架等方面进行了系统的研究.对无线网络技术如何嵌入到基于windows2000操作系统下的全软件数控系统进行了实验分析;在C++Builder6环境下设计了全软件数控系统中的发送模块程序;数控PDA的接收模块设计利用evb3.0作为平台.奠定了网络化数控系统研究的基础.     

USB 接口在 WINDOWS CE.NET 数控系统中的应用研究

通过对 USB 的体系结构和数控系统数据传输方式的分析,提出将 USB 运用在基于 Windows CE.NET 平台的开放式数控系统的构想,并指出了 USB 运用于数控系统的优点.找出了 USB 运用于数控系统的难点,并针对该难点进行了 Windows CE.NET 中 USB 驱动的设计研究,并以 USB 鼠标为例说明了 Windows CE.NET 中 USB 驱动的开发方法     

基于以太网的分布式数控系统实时通信网络研究

为了实现分布式数控系统高兼容性和强实时性的通信特征,提出了一种基于以太网的分布式数控系统实时通信网络分层体系结构.该结构满足分布式数控系统向上信息无缝融合,向下满足控制网络的实时通信.在保持以太网结构的前提下,提出了实现各层实时通信的方案,特别是实现运动控制层的精确时间同步及通信的强实时性.由此,设计了硬实时通信控制器,保证分层体系结构实现基于通用以太网的实时通信网络.     

基于数字化人的柔性制造系统的研究

基于人机一体化思想,在计算机技术和无线移动通信技术的支持下,将“数字化人”的概念引入柔性制造系统车间中,在此基础上构建了数字化人-机协同柔性制造系统,给出了整体结构图,并详细研究了数字化人-机协同柔性制造系统中的关键技术:基于Web服务技术和移动技术的新型数控系统、蓝牙移动自组网技术、基于多Agent移动计算的人机协同管理调度技术.最后,通过一个实例实现了基于数字化人的人机协同柔性制造过程.     

基于机床行为模型的恒负荷切削在线适应控制研究

为实现加工参数的在线检测和反馈控制,构建了模块化、开放式数控加工控制器.为实现控制器对加工过程参数的硬实时采集和适应控制,设计和开发了基于实时扩展环境的数控系统采集方案.为解决适应控制与插补控制线程的在线有效融合,利用层级式有限状态机技术对开放式数控系统进行了行为建模.为实现机床层级数控加工智能策略的有效集成,在控制器中建立了控制规律的通用框架结构.通过对台阶形铝合金工件进行的加工实验,验证了开放式数控系统恒负荷在线约束适应控制相关技术的正确性和优越性.     

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...     

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。     

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...     

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.