臂式斗轮堆取料机干雾降尘系统技术优化

针对臂式斗轮堆取料机现有降尘系统存在的耗水量大、受环境温度影响大、工况适应能力差以及控制水平低等诸多问题。亟须通过技术创新研发对其优化。文中在分析斗轮堆取料机现有降尘系统存在问题的基础上,结合设备工况实际,对现有非斗轮堆取料机专业厂家生产的干雾降尘系统进行了技术优化。并结合具体工程项目,从技术及经济性多角度对优化后的干雾降尘系统与原系统进行了优势对比。结果表明:优化后的降尘系统耗水量低、环境及工况适应能力强,节能降耗。符合当前斗轮堆取料机市场发展需求。     

斗轮堆取料机仿真训练模拟器的开发与关键技术研究

随着港口散货装卸量的逐渐增大,港口斗轮堆取料机作业任务量不断加大,对于驾驶司机数量需求愈来愈大,且素质要求越来越高,斗轮堆取料机仿真训练模拟器以其安全、高效的特点应运而生。文中以现代虚拟现实技术为先导,从主体硬件的斗轮堆取料机仿真训练模拟器系统总体设计入手,综合运用现代港口起重机操作技术、起重机运动学与动力学、现代传感与测试技术等多学科知识,应用3DS max建立三维仿真模型,以Unity 3D平台为基础,对斗轮堆取料机仿真训练模拟器及其软件系统进行开发研究,考虑振动因子对斗轮轮齿运动轨迹的影响,提出斗轮动态仿真的研究方法和途径,以实现人机交互操作真实化、视景环境高沉浸化、训练管理功能多面化,以及虚拟现实技术的交互性、沉浸感和创意性。     

智能一体化生产控制平台在火电厂斗轮堆取料机无人作业系统中的应用

本文主要介绍了自主研发的智能一体化生产控制平台在火电厂斗轮堆取料机无人作业系统中的应用。该系统利用生产控制平台的基础功能模块以及开发设计的自动堆取料控制模型算法,根据煤场实时三维煤堆信息,结合作业指令和工艺,自动生成作业和控制指令,下发至斗轮堆取料机,完成全自动堆、取料作业。涉及的研究内容包括:斗轮堆取料机无人作业系统的业务架构;斗轮堆取料机自动堆/取料控制流程设计;煤场三维数字化展示等。     

港口散货全自动装卸设备的研究与开发

介绍了上海港研发并应用的全自动散货抓斗卸船机、全自动散货装船机和全自动斗轮堆取料机。这些装备集成应用了远距物料轮廓检测、计算机网络、自动控制、智能辅助决策等先进技术,实现港口散货的高效自动装卸及堆场作业、港口散货作业的管理与控制一体化,为建设全自动散货码头奠定了坚实基础。     

斗轮堆取料机防碰撞保护的研究

神华粤电珠海港煤炭码头公司现有8台斗轮堆取料机和2台取料机,由于堆场范围广,斗轮堆取料机和取料机行走距离长,大车行走编码器易出现偏差,同一轨道梁之间以及相邻的轨道梁之间容易发生斗轮堆取料机相撞事故,对司机人身安全和设备稳定运行造成很大的威胁。文中探讨神华粤电珠海港煤炭码头公司斗轮堆取料机、取料机之间的防碰撞技术以及RFID技术在编码器校正中的应用。     

臂式斗轮堆取料机出口项目现状及技术要求的特殊性

简述目前国内臂式斗轮堆取料机出口项目的发展现状,重点介绍了外方提出的技术要求相对国内传统项目的特殊性,从执行标准、设计参数、人机工程及安装发运等方面分别对其进行了解读和分析,并就上述特殊性在斗轮堆取料机设计、生产安装等环节提出了相应的应对措施及建议,探讨了妥善处理该特殊性问题对国内斗轮堆取料机行业的重要性。     

臂式斗轮堆取料机取料过程分析

通过对悬臂式斗轮堆取料机取料过程的分析,得出悬臂式斗轮堆取料机挖取散状物料切屑体积的计算方法,为斗轮机构的理论取料能力计算提供了依据。     

悬臂式斗轮堆取料机环保技术研究

悬臂式斗轮堆取料机作为目前被广泛应用于工业产业内的连续装卸设备,其为生产效率的提升产生了积极的影响。然而,随着近年来人们环保意识的不断提升,如何实现悬臂式斗轮堆取料机的环保化发展成为了诸多研究学者关注的内容。基于此,本文针对传统和新型环保技术的特点进行了对比分析,以此来总结了新型悬臂式斗轮堆取料机的环保技术优势,以此来为悬臂式斗轮堆取料机的技术发展提供理论依据。     

GE90-30系列PLC在潘一选煤厂斗轮堆取料机中的应用

简要介绍了GE公司90-30系列PLC淮南矿业潘一选煤厂斗轮堆取料机中的应用,详细描述了90-30系列PLC系统的网络配置、硬件配置、程序结构和斗轮堆取料机的控制工艺等。     

基于PLC斗轮堆取料机的控制及改进

在港口、码头以及制造业中,斗轮堆取料机是一种常见的大型散料运输机械设备,其对物料运输需求较大的地区顺利进行作业起到了关键的作用。其运转中心主要包含斗轮机构、回转机构以及俯仰机构,而在控制上,则通常采取PLC技术也即自动化控制技术来控制,在当前斗轮堆取料机的控制中仍存在着一定的问题。而针对这一系统控制,本文就将从其原理入手,分析其中存在的问题,并提出相应的改进措施。     

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...