面向应用服务提供商服务的区域网络化制造系统

为了提升制造企业新产品快速开发能力，研究和开发了面向应用服务提供商的区域网络化制造系统，提出了一种新的面向应用服务提供商服务的区域网络化制造系统的框架，并阐述了它的工作流程和功能模块的详细设计。运用多代理技术，实现区域制造资源的集成，并构建了集成区域制造资源的数据库管理系统。通过应用统一建模语言的用例图展示了系统的功能需求。运用上述理论和模型，在J2EE平台模式下建立了名为DLUTASP的区域网络化制造系统，在该系统中，大连理工大学承担应用服务提供商的角色，而企业属于用户。应用案例表明，该系统在加快制造企业新产品开发方面具有很大潜力。     

面向网络化制造的资源共享服务平台研究

为支持网络化制造环境下联盟企业之间的资源共享和协同工作,提出了构建面向网络化制造的资源共享服务平台的技术方案。给出了该平台的功能体系结构,详细分析了网络化制造模式下的资源获取和集成技术、共享资源的网络化和集成化管理技术、基于资源共享的异地企业协同工作技术、基于应用服务提供商模式的网络化制造服务技术,以及基于Web服务的虚拟企业应用系统集成技术等关键使能技术,并通过原型系统的开发和初步应用验证了该技术方案的可行性和实用性。     

敏捷网络化集成制造平台的研究与实现

为了迅速响应市场需求的变化，快速地开发、设计和制造产品，提出了一种网络化制造的新模式——敏捷网络化集成制造(ANIM)。设计了敏捷网络化制造集成平台的运行策略和框架；分析了平台的目标、功能和关键技术；通过建立原型系统，实践并验证了敏捷网络化制造系统中的若干理论和实现技术。     

RP制造流程服务的自主管理应用研究

基于快速成形网络化集成服务系统,结合自主计算的相关理论,提出了一种面向快速成形流程服务的自管理框架,针对流程服务的特性,以实际应用案例的角度分别从自配置、自优化、自保护等方面对其自我管理的特性进行了分析,为提高系统管理的自治性提供了有效的技术理论支持,并实现了系统的自主管理等功能。通过案例应用对制造流程服务进行了测试,验证了该方法的有效性。     

RP制造流程服务的自主管理应用研究

基于快速成形网络化集成服务系统,结合自主计算的相关理论,提出了一种面向快速成形流程服务的自管理框架,针对流程服务的特性,以实际应用案例的角度分别从自配置、自优化、自保护等方面对其自我管理的特性进行了分析,为提高系统管理的自治性提供了有效的技术理论支持,并实现了系统的自主管理等功能。通过案例应用对制造流程服务进行了测试,验证了该方法的有效性。     

夹具设计资源共享服务平台原型系统开发

在分析夹具设计特点和发展趋势的基础上,提出了一种面向网络化的夹具设计资源共享服务平台的功能体系结构。重点研究了信息集成技术、基于ASP模式的网络化制造服务技术、异地企业协同工作技术等关键技术,并通过原型系统的开发和初步应用,验证了所提出的夹具资源共享服务平台功能体系结构的可行性和实用性。     

轻纺区域网络化制造系统的研究

在需求分析的基础上，提出将协同设计、供应链管理、客户关系管理和ASP服务作为轻纺区域网络化制造系统的重点，建立了一个由基础层、系统核心层、应用服务层和门户层组成的轻纺区域网络化制造系统，并详细介绍了系统的功能。给出了基于多Agent的应用服务提供机制。提出了虚拟ASP服务的概念，建立了面向业务的虚拟ASP服务过程模型。探讨了轻纺区域网络化制造系统的实施模式和商业模式。     

基于MAS与Web服务的网络化集成制造技术研究

为提高制造系统的智能重构能力,快速地开发、设计和制造产品,提出了基于Web服务与多智能体系统MAS的网络化制造信息集成方案,构建了基于Webservices的MAS网络化制造模型体系结构,并论述了其通信机制和协作机制的实现。该网络化制造模型有利于提高网络化制造的智能水平,优化网络化制造的系统设计。     

面向纹织行业的网络化制造服务模式研究与应用

随着网络化制造在国内、外的发展,制造服务逐渐成为网络制造的主要业务形式,制造服务的集成成为网络制造系统研究的热点问题.本文系统分析了制造专业技术服务的集成模式,并在面向行业的网络化制造平台上进一步探讨了服务集成的应用.该平台以快速发展的计算机网络和信息技术为支撑工具,通过为客户和企业建立一个协同设计的制造环境,实现制造资源和技术资源的共享与互补,实现基于服务的企业业务过程重组,缩短了纹织产品的生产制造周期,提高了行业的竞争力.     

制造过程集成管理系统的研究与实现

为有效整合区域制造资源,实现制造过程各环节的协同,对基于制造资源优化配置的制造过程管理系统进行了深入研究,提出了集成系统的组织形式和体系结构,并重点解决了各异构系统的信息集成问题。集成系统包括可重构制造资源优化配置平台、基于知识的网络化协同工艺规划系统、集成化数控制造与仿真、基于构件的可重构制造执行系统、可视化制造过程项目管理与监控等5个子系统;在对各应用系统功能及数据交换进行需求分析的基础上,具体阐述了基于可扩展标记语言的信息集成的实现过程,包括基于可扩展标记语言的数据接口规范、接口处理工具和基于文档管理平台的集成方案。最后以模具企业中的实际生产过程验证了系统的集成应用。     

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。     

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.     

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。     

RLS and LMS blind adaptive multi-user detection method and comparison in acoustic communication

RLS and LMS blind adaptive multi-user detection algorithm and multi-user detector was proposed to solve the problem of multi-user signal detection problem encountered in underwater acoustic communication networks.In simulation analysis,RLS and the LMS blind adaptive multi-user detector were designed and tested for synchronous and asynchronous multi-user communication process.The results of SIR comparison and MMSE comparison show that,both of the two methods can realize blind adaptive detection when any user change in multi-user communication,during this process,the training communication sequences are not needed.The RLS algorithm has about 5 dB higher in SIR compared with LMS algorithm,and the convergence velocity of RLS algorithm is also higher than LMS algorithm when the communication users change.RLS algorithm has better ability in multi-user detection than that of LMS algorithm,and it has great attraction and guiding significance for solving the problem of multiple access interference(MAI) in multi-user communication.     

Robust Impedance Control of Robots Using an Adaptive Interaction Force Observer

For robot interaction control,the interaction force between the robot and the manipulated object or environment should be monitored.Impedance control is a type ...     

Research on key techniques of expendable conductivity temperature depth measuring system

This paper analysis the developing of expendable conductivity temperature depth measuring system(XCTD)and introduce its principle of measuring about temperature,salinity and depth of ocean.Some key techniques are put forward.According to the real needs of XCTD,conductivity sensor with high sensitivity is designed by principle of electromagnetic induce,the ocean conductivity from induced electromotive force has been calculated.Adding temperature correction circuit would help to reduce error of conductivity measurement because of sharply changing temperature.Advanced temperature measuring circuit of high precision and the constant current source is used to weaken effect of self-heating of resistance and fluctuation of the source.On respect of remote data transmission,LVDS is a good choice for the purpose of guarantee the quality of data transmitted and the transmission distance is reaching to thousand meters in the seawater.Modular programming method is also brought into this research aimed at improve the stability,reliability and maintainability of the whole measuring system.In February,2015,the trials in South China Sea demonstrate that the developed XCTD realize effective measurement at a speed of 6 knots and detection depth at 800 m.The consistency coefficient of the acquired data is greater than 0.99 and the success rate of probe launching is above 90%.     

CHARACTERISTCS OF FLUID FILM IN OPTIMIZED SPIRAL GROOVE MECHANICAL SEAL

In order to investigate the sealing performance variation resulted from the thermal deformation of the end faces, the equations to calculate the fluid film pressure distribution, the bearing force and the leakage rate are derived, for the fluid film both in parallel gap and in wedgy gap. The geometrical parameters of the sealing members are optimized by means of heat transfer analysis and complex method. The analysis results indicate that the shallow spiral grooves can generate hydrodynamic pressure while the rotating ring rotates and the bearing force of the fluid film in spiral groove end faces is much larger than that in the flat end faces. The deformation increases the bearing force of the fluid film in flat end faces, but it decreases the hydrodynamic pressure of the fluid film in spiral groove end faces. The gap dimensions which determine the characteristics of the fluid film is obtained by coupling analysis of the frictional heat and the thermal deformation in consideration of the equilibrium condition of the bearing force and the closing force. For different gap dimensions, the relationship between the closing force and the leakage rate is also investigated, based on which the leakage rate can be controlled by adjusting the closing force.