船舶电力综合控制系统研究与开发

针对船舶电力系统监测能力弱、可靠性差、自动化程度低等问题,将传感器、可编程逻辑控制器、并车与保护单元、电力综合显控台应用到船舶电力综合控制系统中。对该系统的需求进行分析,建立自上而下管理层、控制层和数据层3个层次之间的关系,提出了船舶电力综合控制方法。在联调试验和船舶上对该综合控制系统进行了实际应用。研究结果表明,该综合控制系统可显著提高船舶电力系统的监测能力、可靠性、自动化化水平,保证了船舶电力系统的安全性、可靠性、优质性和经济性。     

船舶损管监控系统的研究与开发

针对影响船舶安全的各种损害隐患问题,对船舶损管监控系统的必要性、功能、组成、原理、架构、硬件和软件等方面进行了研究,对基于损管监控台、现场控制设备及数据处理设备、各类传感器及执行机构的管理层、控制层、数据层三层控制模型进行了归纳,提出了基于传感器、可编程逻辑控制器和损管监控台的船舶损管监控系统,利用半实物仿真试验、陆上联调试验和实船应用对该监控系统的性能、功能、环境适应性和电磁兼容进行了测试。研究结果表明,该系统可实时监控各种损害隐患状态,提高了船舶损害隐患的管控水平,保证了船舶的安全性、可靠性。     

关于煤矿产量监控系统的设计研究

在确定煤矿产量监控系统设计目标的基础上,研究了产量监控系统的硬件和软件部分的设计,并对该系统的性能特点进行了应用测试验证,结果表明:该监控系统具有更高的智能化监控能力,对降低生产过程的故障发生率及故障检修时间起到了重要作用,并得到了现场人员的一致认可。     

基于Niagara的物联网生产线管理系统设计

为实现生产线智能化,开发一套基于Niagara应用框架的物联网生产线管理系统.该系统基于物联网三层架构体系,实现生产线设备远程操作和实时监控.基于深度学习的产品表面缺陷检测技术和故障预测技术,实现生产设备运行状况实时反馈.     

基于Niagara的物联网生产线管理系统设计

为实现生产线智能化,开发一套基于Niagara应用框架的物联网生产线管理系统.该系统基于物联网三层架构体系,实现生产线设备远程操作和实时监控.基于深度学习的产品表面缺陷检测技术和故障预测技术,实现生产设备运行状况实时反馈.     

电力故障信息处理系统的研制与开发

介绍了为电力系统研制开发的分布式电力设备自检、故障数据采集及基于Internet的信息管理系统。该系统能够及时地将分布在各地变电站的所有设备状态数据通过电话拨号或者DDN方式传输到监控中心的数据库。使用信息管理系统可以实时地监控故障情况并进行各种数据的查询分析。该系统的应用可以使电力系统的设备监控自动化以及故障处理速度和能力都有很大的提高。     

配电自动化终端设备在配网自动化中的应用探讨

本文探讨了配电自动化终端设备在配网自动化中的应用,终端设备通过实时监测、数据采集和保护装置,提高电网可靠性和安全性。具备执行机构和通信能力,实现远程控制和与上级系统的数据交换。其中,故障检测分析技术实现故障自动隔离和供电恢复,通信技术实现设备间互通和远程监控,终端设备应用提升电力系统稳定性、灵活性,支持分布式能源管理和用户智能交互。     

电力故障信息处理系统的研制与开发

介绍了为电力系统研制开发的分布式电力设备自检、故障数据采集及基于Ｉｎｔｅｒｎｅｔ的信息管理系统。该系统能够及时地将分布在各地变电站的所有设备状态数据通过电话拨号或者ＤＤＮ方式传输到监控中心的数据库。使用信息管理系统可以实时地监控故障情况并进行各种数据的查询分析。该系统的应用可以使电力系统的设备监控自动化以及故障处理速度和能力都有很大的提高。     

高速公路智能化供配电监控预警系统设计

高速公路智能化供配电监控预警系统可以为高速公路的高效、安全、可靠运行提供有力支撑,具有较高的可靠性和实用性,能及时对故障进行预警,便于运维人员及时开展故障排查和设备维修,且有利于降低能耗和保护环境。对高速公路智能化供配电监控预警系统设计现状进行总结,对高速公路供配电系统组成进行概述,并从系统总体架构设计、硬件设计、软件设计等方面,对高速公路供配电系统中的智能化供配电监控预警系统设计进行分析。     

基于ARM-DSP的嵌入式配电终端设计

采用ARM芯片AT91RM9200和DSP芯片TMS320F2812双组合处理器方案,实现了一种基于嵌入式系统的新型智能化配电终端.该终端解决了传统配电终端体积大、响应速度慢、可靠性不高、功能单一的问题,可以采用高速高精度的数字采样技术对三相电压电流进行监测,完成谐波分析、无功补偿、故障检测等功能,还可以提供友好的人机界面,便于用户进行管理控制.此外,该终端具有丰富的通信接口,可满足电力系统各种复杂的需要.     

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...