面向大批量定制的产品设计方法研究

面向大批量定制的产品设计是企业成功实施大批量定制的关键环节。介绍了 4种主要的面向大批量定制的产品设计方法 ,即在已有产品结构和模块基础上的产品配置设计 ;在已有产品结构和模块基础上 ,根据用户需求对模块的尺寸进行变化的产品变型设计 ;根据用户需求选择产品结构和模块的产品组合设计 ;用户需求变化较大时的产品创新设计。并对这 4种设计方法进行了比较。     

面向大指定制的产品设计方法研究

面向大批量定制的产品设计是企业成功实施大批量定制的关键环节。介绍了4种主要的面向大批量定制的产品设计方法，即在已有产品结构和模块基础上的产品配置设计；在已有产品结构和模块基础上，根据用户需求对模块的尺寸进行变化的产品变型设计；根据用户需求选择产品结构和模块的产品组合设计；用户需求变化较大时的产品创新设计。并对这4种设计方法进行了比较。     

面向大批量定制的产品配置系统的研究与实现

大批量定制是大批量生产和定制生产两种生产方式的有效结合,是为满足客户个性化和产品多样化需求而发展的一种先进制造模式.主要对基于大批量定制理论的产品配置系统的构建技术进行研究;首先论述和分析了目前学术界和工业界对大批量定制理论和实现技术的研究情况,包括产品建模、规则驱动的产品配置等关键技术;然后提出了遵循产品族架构、基于GBOM(General Bill of Material)的产品配置系统的体系结构和功能构成;重点分析并讨论了BOM结构和配置结构分离的产品建模方法,以及面向产品族群的、规则定制与规则匹配相独立的产品配置系统的工作原理和系统模型;最后通过一个案例验证了系统的正确性,并给出了系统运行实例.     

基于本体论和知识规则的大批量定制配置设计技术研究

在分析大批量定制模式下配置设计知识的基础上，规划面向产品族的配置设计本体、知识域及其属性，提出基于面向对象思想的产品配置设计模块。定义配置设计规则用于过程推理和配置知识演变，着重探讨了配置设计求解策略和实现算法。以配置设计知识模板为向导，实现配置设计方法的形式化表达，配置优化应遵循的原则。结合项目给出大批量定制配置设计的应用实例。     

集成环境下大批量定制的产品配置设计技术及其应用

提出了大批量定制的广义需求分类与多模式需求模型，给出了大批量定制的产品模块准配置与零件相似配置方法和大批量定制的功能单元配置与优化方法，结合浙江巨人电梯有限公司电梯产品的配置设计，开发了集成环境下大批量定制的产品配置集成设计系统，得到了较好的应用。     

大批量定制及其模型的研究

大批量定制是一种面向 2 1世纪的新的生产方式 ,其目的是解决长期困惑制造业的“两难”问题 ,就是既要使产品满足客户个性化的要求 ,又要使产品的成本和交货期与大批量生产的产品相同或相接近。本文讨论了大批量定制的背景 ,提出了面向大批量定制的集成产品和过程模型 ,并初步建立了一种大批量定制的数学模型。     

一种面向大批量定制的产品可拓设计方法

分析了大批量定制模式下产品设计的研究现状,提出了面向大批量定制的产品可拓设计思想。运用物元理论对大批量定制产品模型进行了重构,建立了面向整个设计过程的统一物元模型,并通过物元变换与拓展实现产品变型设计,最后对产品进行了优度评价。实例分析证明,可拓设计不仅满足大批量定制产品的多样化需求,还大大提高了设计过程的规范化和可重用性。     

面向大批量定制产品开发设计技术的应用研究

结合工业汽轮机关键零部件转子和汽缸,对面向大批量定制产品开发设计关键技术--模块化、产品零部件主模型、产品主结构以及产品配置技术的应用进行了较深入的研究,并在此基础上提出了面向大批量定制产品开发设计系统.该系统在PDM-Smart Team基础上,集成自主开发的编码模块及事物特性表模块.设计人员借助该系统可建立产品的主模型和主结构,从而快速地设计出满足客户需求的个性化产品.最后,给出了其在工业汽轮机设计中的应用实例.     

面向大批量定制的产品开发设计方法研究

面向大批量定制的产品开发设计过程可重组为创造性的开发过程和敏捷性的设计过程，产品族主结构、零部件的主模型和主文档是开发过程的结果，也是设计过程的基础。根据订单要求，通过主结构进行配置设计，确定定制产品结构；通过主模型和主文档进行变型设计，派生出定制产品零部件的工程图、工艺过程规划和NC程序等，达到定制产品快速设计的目的。提出了一种大批量定制产品族的模块化开发方法和定制产品快速设计方法，给出了工业汽轮机定制产品的开发设计实例。     

面向DPMC的定制资源管理平台设计及实现

大批量定制设计平台不仅要面向设计师,更需要面向客户的直接定制,而其关键和基础是定制资源的动态管理与维护.相对于面向设计师的设计资源,提出了面向客户的定制资源概念,并系统地设计了定制资源管理平台的总体框架.通过模型映射、规则配置与定制资源管理平台的内部接口,实现了用于客户定制系统的定制资源的动态管理和维护.该平台在浙江某定时器厂家的大批量定制设计中得到了有效应用.     

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.     

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.     

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.     

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...     

OPTIMIZATION METHOD ON IMPELLER MERIDIONAL CONTOUR AND 3D BLADE

An optimization method for 3D blade and meridional contour of centrifugal or mixed-flow impeller based on the 3D viscous computational fluid dynamics (CFD) analysis is proposed. The blade is indirectly parameterized using the angular momentum and calculated by inverse design method. The design variables are separated into two categories: the meridional contour design variables and the blade design variables. Firstly, only the blade is optimized using genetic algorithm with the meridional contour remained constant. The artificial neural network (ANN) techniques with the training sample data schemed according to design of experiment theory are adopted to construct the response relation between the blade design variables and the impeller performance. Then, based on the ANN approximated relation between the meridional contour design variables and impeller performance, the meridional contour is optimized. Fewer design variables and less calculation effort is required in this method that may be widely used in the optimization of three-dimension impellers. An optimized impeller in a mixed-flow pump, where the head and the efficiency are enhanced by 12.9% and 4.5% respectively, confirms the validity of this newly proposed method.