精密检测及质量控制系统的设计与分析

从满足制造业过程中对质量控制的需求出发,通过使用电子数显卡尺测量数据,计算质量控制图的控制参数,从而做出受控对象的过程控制图,对测量数据进行跟踪、传送与管理。     

分步式谐波分析系统在铝厂整流站中的应用

针对铝厂整流站的设备特点和谐波测量的实际问题,提出了分步式谐波分析系统.分步式结构能满足整流站多点测量、实时分析的要求,而且扩展容易.系统中由上位计算机对数据采集板进行控制,并将数据采集板采集的数据传送给上位机进行数据分析.     

自动气象站数据采集器温度通道的环境温度补偿

针对自动气象站数据采集器温度通道容易受到环境温度影响限制测量精度的问题,对数据采集器进行了温度漂移检测实验并对实验数据进行了误差分析,提出了基于改进自适应遗传算法优化的最小二乘支持向量机(improved adaptive geneticalgorithm least squares support vector machine,IAGA-LSSVM)的温度补偿方法。改进的自适应遗传算法能够对最小二乘支持向量机拟合过程中的关键参数进行调整从而建立最优模型。与传统LS-SVM相比,IAGA-LSSVM对温度数据的建模均方根误差减小了0.007,有效提高了建模的精度。根据建立的最优函数模型对该数据采集器温度通道进行温度补偿结果表明,经该方法补偿后的数据采集器在任何温度环境下的温度测量误差均小于0.03℃,具有更高的测量精度和稳定性,有效提高了自动气象站的温度观测质量。同时,设计开发了温度补偿界面,为自动气象站观测数据校验和实际业务应用奠定了基础。     

多通道自动测量和加工精度统计分析系统

利用数字千分尺测量一批零件的尺寸，测得的数据通过多路数据采集器实时送入计算机。通过Visual Basic和Excel等软件对数据进行处理，可以快速得到各种检测分析结果。再用Access软件创建加工精度统计分析数据库。实现各种图表的智能化查询。     

基于LabVIEW和USB接口数据采集器的设计

针对工程测量对数据采集器的实际需要,采用LabVIEW图形化开发软件、高精度高速度的MAX197数据采器、AT89C52单片机和CH372 USB控制芯片,实现8路12位数据采集、1路8位D/A输出,同时具有温度检测显示功能,A/D最高采样频率可达100 kHz.该数据采集器具有较高的性价比,可以推广应用。     

发电设备的振动频谱分析

根据数据采集器采集的数据,对相应的频谱图进行分析,用来诊断设备存在的故障。     

利用-s图控制汽车零件制造质量

阐述了应用计量控制图中的均值 -标准差控制图 (x -s图 )对汽车零件制造质量进行控制的计算机系统。该系统对机械零件加工质量进行实时控制 ,对加工过程的有关数据进行收集 ,按统计质量控制原理进行分类、统计、绘制控制图。对所得到的图进行分析 ,判断生产过程是否处于控制状态 ;还得到零件单项质量不合格率等统计结果     

复合主动测量技术在现代加工设备中的应用

自动化加工设备中的主动测量系统是一种在线、实时、动态检测系统,对测量设备、器件制造和使用的精度要求较高,对数据传输、处理、信息反馈、以及相应控制的时效性要求极为严格。数据采集传感器的采样精度和数据采集模式要求则更为严格。图1所示为主动测量在加工设备中应用的原理图。     

一种测量双导轨位置度误差的新方法

介绍了一种新的位置度误差测量方法,该方法利用激光器、PSD、LVDT、倾角传感器、数据采集卡以及计算机组成的测量系统,能够对平行双导轨的位置度进行有效的测量。     

利用-x-s图控制汽车零件制造质量

阐述了应用计量控制图中的均值-标准差控制图（x^- -s图）对汽车零件制造质量进行控制的计算机系统。该系统对机械零件加工质量进行实时控制，对加工过程的有关数据进行收集，按统计质量控制原理进行分类、统计、绘制控制图。对所得到的图进行分析，判断生产过程是否处于控制状态；还得到零件单项质量不合格率等统计结果。     

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.     

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.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...