基于联邦模式的云制造集成体系架构

云制造平台可以为集团企业和中小企业提供在线服务,然而异构性及不相容性限制了跨平台的云制造资源与能力的共享和协作.为了解决这一问题,提出了基于联邦模式的云制造联邦集成架构及云制造联邦执行支撑环境,为多个异构云制造平台集成提供了一种有效的集成方案,既可实现云制造平台之间的制造资源与能力的共享与协同,也保持了原云制造平台的自治性,任何云制造平台的加入和退出都不影响其他云制造平台的运行.     

面向服务链构建的云制造资源集成共享技术研究

为实现时序约束关联任务驱动的云制造环境下面向服务链构建的制造资源集成共享,研究并提出一种能促进云制造环境下制造资源快速共享、广域集成和分散服务特点的服务过程模型,对基于语义本体的云制造任务与资源建模、基于Web服务资源框架的云制造资源的平台服务化封装方案、云制造任务分解与时序约束关联原子任务链构建技术,以及云制造资源服务链构建技术等关键问题进行了研究,有效解决了云制造环境下异构资源描述、虚拟化、检索匹配与服务组合问题,最后通过仿真算例对提出的云制造服务模式及技术方案进行了验证。     

基于SOA的数控加工厂云制造平台架构

为了满足数控加工厂灵活开发设计新业务的需求,快速响应业务环境的变化,简化服务的交付,实现数据中心的动态基础架构,提出了基于So A理念以及支撑技术构建面向服务的数控加工厂云制造平台架构,从数控加工厂的So A架构和制造云两方面对该云制造平台架构进行了描述,探讨了平台涉及到的核心关键技术,如数控机床智能保障系统、工艺优化系统、现场应用管理系统。为数控加工厂服务型云制造提供技术支撑。     

联邦式协同多Agent快速设计框架研究

在研究模块化快速设计特点的基础上,提出用联邦式协同多Agent对复杂产品进行快速设计。在全局Agent联邦协调下各Agent联邦协同设计,实现从“用户—功能—功能元—元模块—模块—产品”的映射,完成快速设计的全过程。阐述了主要Agent联邦的功能、协作、通信和工作机制,构建了基于联邦式协同多Agent和工作组的快速设计框架。     

云制造环境下跨企业协同生产调度算法

为解决云制造环境下的跨企业协同生产调度问题,提出一种适用于云制造环境下生产资源调度的混合集合规划方法。该方法基于切削算法框架,综合考虑多种约束,提出一种有效的求解策略,实现了一种面向订单且适用于跨企业、多约束、多品种、小批量的有限能力调度算法,为供应链中供需企业提供了一份拖期小、费用低、跨度短的协同生产计划。利用多组制造企业真实数据对模型进行测试,结果表明,该模型可在合理时间内有效求解实际应用规模的跨企业协同生产调度问题。     

云制造PaaS平台中协同过程构建与定制方法

云制造服务体系为实现产业专业化分工和社会化协作,存在大量合作伙伴之间的协同过程。协同过程普遍呈现出参与者多、协同链长、灵活多变等特征,对过程建模、定制、构建与执行等协同技术提出了诸多挑战。为此提出云制造PaaS平台架构和基于云制造PaaS平台的协同过程构建与定制方法,并给出定制的验证算法。基于该平台,平台运营商首先定义元协同主体及特征,制造服务独立软件开发商在将制造服务交付到平台上的同时定义协同主体及特征,制造企业可以租赁平台上的制造服务,并定制特定协同主体和特征。通过实例分析证明,基于该平台和方法,可以支持云制造服务的开发者和企业方便地构建各种协同应用,应对云制造服务体系中的大规模业务协同需求。     

基于模型、数据、知识的设计与制造协同框架

针对工业产品在研发制造过程中对于过程协同、数据协同、知识协同的设计与制造协同需求,构建了基于模型、数据、知识的设计与制造协同框架,给出设计与制造协同应用的顶层设计新思路。梳理了设计与制造协同过程中的模型、数据及知识资源,明确设计与制造协同的资源基础;搭建了基于系统互联平台、大数据云平台、知识协同平台、协同服务平台的网络化协同支撑平台的架构,构成企业的设计与制造协同网;设计了基于设计与制造全生命周期的协同协议,并构建了模型、数据、知识协同集成模型,给出基于模型、数据、知识的设计与制造协同应用;在某汽车变速器企业进行了应用验证,取得了良好成效,证明了框架的可行性。     

基于物联网的制造平台

针对制造业信息化对智能化、服务化和精益化的需求,提出基于物联网的制造平台框架。基于云服务的产品协同设计系统包括基于云服务的协同设计虚拟环境、基于PLM的设计过程数字化和设计支持智能化;基于物联网的数字化制造平台采用物联网技术和设备监控技术采集数据,依托制造资源和制造能力云,对工厂内的制造资源、生产过程、物料和质量等进行集中管控。     

大型装备企业服务型制造协同平台研究

服务型制造是大型装备企业转型的趋势,为了更好的支持这种转型,实现异构、异域环境下的业务协同,促进企业形成差异化竞争优势,本文研究了以大型装备企业为核心的服务型制造协同平台。探讨了大型装备企业服务型制造运行模式,基于SOA理念以及支撑技术构建了面向服务的、松散的服务型制造协同平台架构,研究了平台涉及到的关键技术,如资源服务化封装技术、制造服务分类、服务匹配和组合技术。结合实例对平台进行了开发,这为大型装备企业服务型制造实施提供技术支撑。     

基于云制造的起重机协同设计平台

针对起重机行业设计中存在的问题,将云制造的服务模式和协同设计方法结合,提出了基于云制造的起重机协同设计平台,详细描述了云设计平台的构架,分析了云设计平台的关键技术。     

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。     

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.     

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.     

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.     

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...