新一代网络化、开放式数控系统及应用

高速、高效、复合、精密、智能、环保等是世界机床以及数字化装备的发展趋势，而网络化、智能化、开放式数控系统是实现高水平装备的保证，开放式体系结构数控系统是开放式、高可靠、高性能、系列化、智能化、网络化数控系统的通称。其核心是开放式，即系统各模块与运行平台的无关性、系统中各模块之间的互操作性和人机界面及通信接口的统一性。开放式体系结构使数控系统有更好的适用性、柔性、适应性、扩展性，并向智能化、网络化方向发展。     

西门子数控系统在机床改造中的运用分析

西门子数控系统是新型的数控系统,具有数字控制程序、可编程控制系统以及智能化控制系统等多种综合性系统。西门子数控系统在现代机床改造中的应用,使机床应用的灵活性增加、工作效率提升和机械运行结构的紧密性增强,是我国现代机械制造技术创新优化的重要体现。     

数控系统的客户化及智能化发展

机床技术的不断发展,智能化已成为数控机床研究的一个重点.数控系统的开发创新,成为智能化机床最关键的环节.介绍了飞阳数控系统的客户化和智能化系统,并对数控系统的智能化进行了分析和总结.     

采用SIMATIC WinCC的数控成形磨齿机系统人机界面的实现

根据数控机床人机界面设计原则和模块化设计原理,开发了数控成形磨齿机系统人机界面。选用SIMATICWinCC为开发平台,在数控系统功能分析的基础上,根据成形磨齿的工艺要求,设计机床各级模块,建立各模块的参数化人机界面;用户在人机界面界面的引导下即可完成成形磨齿加工操作、管理加工数据、查询浏览历史信息和实时监控机床运行状态。     

数控系统智能化为产业升级指引方向——访西门子（中国）有限公司机床数控业务总经理许政顺

智能化是近几年数控系统的发展趋势之一。早期的数控系统完全根据操作者的指令来控制机床的运动,是被动的执行者;而随着人们对于制造精度和效率的不懈追求,对于数控系统智能化功能的要求也越来越多。作为有着20年西门子公司工作经历的资深经理人,许政顺始终关注着世界数控技术的发展,同时基于对国内制造产业现状的深刻了解,使得他对未来机床行业的发展有着独到的见解。关于数控系统的智能化,许总认为它主要体现在两个方面,一是数控系统操作编程的智能化。     

西门子数控系统在机床中的应用

对西门子数控系统进行了简要概述,从调试程序一体化、改进机床类型、升级数控系统、专业控制系统的智能化驱动以及高精端控制数控模块等方面,分析了西门子数控系统在机床改造中的具体应用情况,为今后西门子数控系统在机床中的创新发展应用提供了参考。     

应用840D扩展接口编制曲轴内铣刀补画面的方法

以曲轴内铣机床人机界面的设计为例,介绍了应用西门子840D数控系统扩展接口开发曲轴内铣刀具补偿人机界面的过程及方法。     

智能化的海德汉数控系统

正智能化是数控系统的发展趋势,智能化的数控系统可使操作简便,可使数控机床提高精度和效率。本期的产业论坛邀请到西门子许正顺、海德汉张兴全和发那科栗炜三大数控系统品牌的代表,以及曹彦生、柯秉光和刘一博等用户代表就数控系统的智能化问题进行探讨,以期引起大家的共鸣。智能制造技术是在现代传感技术、自动化技术、网络技术、拟人化智能技术等先进技术的基础上,通过智能化的感知、人机交互、决策和执行技术,实现设计过程、制造过程和制造装备智能化,是信息技术和智能技术与装备制造过程技术的深度融合与集成。智能化机床就是对制造过程能     

模具加工:高屋建瓴 小巨人机床在汽车模具行业中的应用

机床的高速度和高精度取决于机床的主要配套元件,主要体现在机床的主轴功率特性、数控系统、电主轴技术、温度控制技术、温度补偿技术和智能化。     

对数控系统的智能化的几点认识

〉随着现代计算机网络技术、现代通信技术和现场总线控制技术的飞速发展,智能化已融入到工业生产的方方面面,数控系统的智能化程度也越来越高。以笔者使用的数控机床为例,在传统数控机床基础上增加了用户界面的图形化和可视化,操作者可以通过窗口和菜单进行操作,如Siemens840D sl数控系统,已可以通过人机交互界面,     

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.