摩擦材料性能试验机测控系统设计

阐述了基于工控机控制的摩擦材料性能试验机测控系统的设计方法,试验机测控系统硬件由安装了多功能数据采集卡的工控机为核心的测控电路组成,并配置了用VB编写了操作方便、功能强大的测控系统软件。还介绍了测控系统硬件和软件抗干扰措施。     

编解码电路在温度测控系统中的应用

本文介绍一种用编码、解码集成电路进行多点温度测控的系统。文章首先介绍编解码电路ＳＹ８０８Ｅ／Ｄ,然后给出温度测控系统的硬件电路及软件框图。     

一种微型飞行器测控系统的研究和设计

为研究微型飞行器的动力学特性,必须设计测控电路以获得实验数据.微型飞行器的测控系统可以基于单片机系统进行开发,如何规划硬件电路和处理系统中的各类信号是设计中的两个关键问题,也是发展测控电路芯片系统的基础设计.本文设计提供了一种常规的解决方法,在实际工程的应用中取得了很好的效果.     

基于ADC0809的模数转换设计与调试

模数转换是微机测控系统的重要组成部分。论文阐述了微机测控系统中模数转换的应用和软件设计,介绍了模数转换接口电路的测试、故障分析与检测方法。     

基于电流电压传感器的低频电磁场测控系统设计

在工作过程中经常要对低频电磁场进行测控,现有测控系统不能满足精度要求,利用新型高精度K-811多功能采集卡、计算机硬件接口、模拟和数字转换电路及电压电流传感器组成了低频电磁场测控系统的硬件,结合Windows图形用户界面的C＋＋程序编程软件,设计了功能相对完善的低频电磁场测控系统。     

基于电流电压传感器的低频电磁场测控系统设计

在工作过程中经常要对低频电磁场进行测控,现有测控系统不能满足精度要求,利用新型高精度K-811多功能采集卡、计算机硬件接口、模拟和数字转换电路及电压电流传感器组成了低频电磁场测控系统的硬件,结合Windows图形用户界面的C++程序编程软件,设计了功能相对完善的低频电磁场测控系统。     

小型精密制造车间的环境参数测控系统

介绍环境温湿度实时测控系统的研制思路和方法。该装置可实现特定场所环境温度、湿度的实时测量和显示。对其网络协议控制方法、电路的硬件选择进行分析,最终使测控系统能方便地应用于包括精密制造车间等在内的对温湿度测控有较高要求的场合。     

数显温控仪的设计与制作

本课题介绍了一种基于单片机技术开发的温度测控系统。该系统由测温电路、A／D转换电路、温度显示电路、报警电路、温度控制电路组成,其中温度传感器选用小型、低功耗、可靠性高、低成本的LM35,主控电路选用AT89C5I单片机。     

全数字化温湿度无线测控系统

介绍具有无线功能的温湿度测控系统的工作原理和硬件、软件结构。该系统体积小、功耗低、电路简单,可以方便安装和实时监控。     

用于工业实时测控的智能仪器的抗干扰技术

本介绍了用于工业现场恶劣环境下的时测控系统的抗干扰原理，电路和措施。     

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...