数字图像处理原理在光刻自动对准技术中的应用

本文介绍一种用于DSW投影光刻机的电视扫描同轴对准装置及数字信号处理方法。装置采用电视摄象机作为图像信息传感器,模拟量积分压缩数字量,微处理机精确计算硅片和模版的偏移量并控制工作台作微小调整。该装置已具有刻出1.2μ宽线条所需的±0.3μ对准精度。     

新型JC-50D自动送钻绞车的设计与计算

重点介绍了新型JC-50D自动送钻绞车的设计方案、结构性能特点和主要技术参数。该绞车采用两台800kW直流电机驱动,配备了自动送钻装置、PSZ75B液压盘式刹车、换档机构、润滑系统、绞车气管道及DSW70水冷电磁涡流刹车等主要部件。该绞车具有整体结构紧凑、效率高、能耗低、刚性好、性价比高、易于安装和运输等优点。     

应用H型驱动结构设备精度检验项目分析与研究

本文通过对应用H型驱动结构设备的几何精度检验项目进行分析和分类研究,阐述了应用H型驱动结构典型设备几何精度对设备工作精度的影响,提出了提高此类结构设备几何精度的设计制造方法。希望可以为此类设备制造精度的进步和提高提供有价值的参考。     

应用精度诊断排除机床传动精度误差

金属切削机床的精度诊断是近年来出现的一门新兴科学,把精度诊断应用到设备维修方面在国外一些发达国家已相当普遍,在我国尚属初始阶段。本文通过应用精度诊断排除机床传动精度误差这一实例,论述了开展金属切削机床精度诊断应用的重要性。     

一体化智能型固体内耗仪的机械系统精度分析与提高

通过对MRS-2型一体化智能型固体内耗仪机械系统中倒扭摆的精度分析,从理论上揭示了固体内耗仪诸多系统中机械系统是内耗测量中的根本和核心所在,其精度是决定整个内耗仪内耗测量精度的关键,同时提出了应用激光二维扫描传感器实时检测与提高内耗仪机械系统精度的方法,填补了该领域的研究空白,具有一定的工程应用价值。     

基于卡尔曼滤波的微压电陀螺的误差补偿

卡尔曼滤波是提高陀螺精度的重要手段。陀螺原始信号中常常含有大量随机误差,这使得陀螺的精度大大降低。研究了适用于陀螺精度的滤波方法,探讨了基于卡尔曼滤波的方法在提高陀螺精度上的应用,并通过分析验证了所研究的算法的有效性和适用性。     

嵌入式计算机辅助圆柱齿轮精度设计系统研究

为实现齿轮精度设计的自动化和智能化,基于嵌入式技术开发了计算机辅助齿轮精度设计系统,给出了嵌入式计算机辅助圆柱齿轮精度设计系统的总体框架,研究了齿轮精度设计中的关键技术和嵌入式计算机辅助齿轮精度设计系统的实现技术。实例验证结果表明:所开发的系统具有操作简单、能快速准确地进行齿轮的精度设计。该系统的研究为齿轮设计的自动化和智能化创造了条件,具有较好的工程应用价值。     

金属管浮子流量计的测量精度与保证措施

本文介绍了浮子流量计精度的定义方法,在选用该系列产品时有关精度方面的注意事项和在应用该产品时如何实现相应的测量精度.     

一种转角精度检测方法及检测装置设计

为解决当前转角精度检测存的在检测设备昂贵或检测操作复杂或与直线位移精度检测系统不兼容问题,从检测理论、功能实现和检测方法操作方面入手,研发一种新的转角精度检测方法,再以降低检测方法操作难度,实现应用价值为导向,设计一种转角精度检测装置,最后以机床旋转轴应用,对转角精度检测装置结合转角精度检测方法的具体应用及工作原理作进一步说明.该转角精度检测方法具有主旋转校验器成本低、测量精度高、检测设备操作简单可靠、造价便宜及可与直线位移精度检测系统相互兼容等特点,同时该检测方法在双光束激光检测系统的基础上扩展,使该系统在具备机床直线轴的直线位移精度测量的同时,又获得了机床旋转轴的转角位移精度测量功能,使一套系统就具备多轴机床所有的位移精度检测需求,降低了工厂设备成本及测量应用成本,该方法的应用和普及,将满足现代高端机床特别是多轴数控机床、精密仪器设备在制造、使用、计量检验方面对转角精度检测的需求,助推高端工业母机战略规划.     

多关节三坐标控制车身焊接精度

影响车身装焊精度的因素有很多,其中焊接夹具的稳定性是最重要的因素,因而夹具精度测量是保证焊接夹具使用稳定性的最主要途径.近年来,多关节三坐标的应用大大提高了夹具精度测量的效率和准确度,成为维护夹具精度,改善车身几何精度的重要手段。     

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.