基于LonWorks技术的智能建筑楼宇自动化系统的研究

楼宇自动化系统作为智能建筑的一个重要组成部分,其系统构成与运行直接影响到整个智能建筑系统运行的成败.LonWorks总线因其很强的开放性、兼容性、灵活性、安全性、可靠性和可互操作性,已被广泛应用于智能建筑领域.本文介绍了智能建筑和现场总线的基本概念,在了解和掌握LonWorks现场总线技术的基础上,提出了一种基于LonWorks技术的空调系统设计方案.     

基于LonWorks现场总线的楼宇自控系统设计

本文针对某工程提出了基于LonWorks现场总线的控制方式,阐述了LonWorks技术的应用及系统升级的优越性,并展望现场总线在楼宇自动化领域的前景。     

基于LonWorks现场总线和IC卡技术的智能停车场设计

本文介绍了基于LonWorks现场总线和IC卡技术组建智能停车场系统,并作为楼宇自动化系统(BAS)的一个子控制系统,以完成停车场的相关数据采集、自动监控、自动收费和防盗等功能.     

基于LonWorks技术的计量数据采集管理系统

介绍运用LonWorks现场总线技术，对企业各类计量数据进行采集，以LonWorks现场总线网络和以太局域数据网的无缝对接，使计量数据采集系统接入高速数据管理网络。     

基于LonWorks的智能防盗控制系统设计

基于LonWorks现场总线技术,对其所构建的控制网络系统的结构特征、控制策略进行了研究,设计并实现了一个采用LonWorks现场总线技术与智能控制器相结合的智能防盗控制系统.     

LonWorks现场总线在油罐测量与管理系统中的应用

为了提高油库自动化管理水平,采用LonWorks现场总线技术和现有以太网结合,构建油库自动化控制与信息化管理一体化系统.介绍了基于LonWorks 现场总线的油罐测量和管理系统,包括系统网络结构、油罐测量原理、现场总线网络控制节点硬件和软件设计及监控服务器的功能实现.而且在网络控制节点中集成了多种储罐仪表通讯协议,使系统兼容性加强.与传统DCS测控系统相比,该系统具有可靠性高、实时性好、测量精度高、控制性能好、成本低、易于扩展等特点.     

基于LonWorks技术的PID控制节点的开发

本文介绍了一种LonWorks现场总线技术以及基于神经元芯片的LonWorks网络PID控制节点的设计与开发。具体包括节点的硬件电路及软件设计方案。本设计方案采用积分分离PID控制算法，并经过实验验证是切实可行的．它使传统控制系统中的模拟设备集成到了现场总线系统中。     

施耐德TAC楼宇自控系统应用——中关村紫金数码园

介绍基于开放的LonWorks技术TACVista楼宇自控系统在商业楼宇建筑群的系统应用。LonMark认证的DDC控制器在系统控制上的配置灵活性和网络的易于扩展性，以及其它通信协议的子系统如何集成到基于LonWorks技术的TAC楼宇自控系统。     

LonWorks技术在路灯配电监控系统中的应用

介绍了LonWorks现场总线技术的基本原理和主要应用,论述了监控系统的要求、总体结构、特点以及上位机监控软件系统。     

LonWorks总线技术中智能节点的设计

LonWorks是一具有强劲实力的现场总线技术,它所采用的LonTalk协议被封装在称之为Neuron的神经元芯片中得以实现,它以Neuron芯片为核心构成智能节点,为测控系统智能化设备的设计提供了很强的实现手段。本文介绍了LonWorks总线技术中智能节点的硬件和软件设计方法。     

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。     

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.     

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.     

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.