共查询到20条相似文献,搜索用时 62 毫秒
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《现代制造工程》2016,(4)
在对福州台钻厂全厂进行总平面布置设计时,充分考虑了工作环境安全性、物流效率、搬运方便性、工艺流程的连续性、人员车辆分流、辅助部门服务、管理方便性、布置方案的可扩展性和绿化及防污染等因素,运用系统布置设计(System Layout Planning,SLP)法,最终设计出一个较为理想的方案,使企业在生产中物流、人员和信息的传递效率达到最佳,降低了生产成本,提高了企业竞争力。通过对福州台钻厂进行基本要素分析、物流分析和作业单位之间的非物流相互关系分析,运用SLP设计模式对其进行平面布置优化。在Em-plant仿真软件环境下,建立制造系统仿真模型,进行车间布局仿真分析,对车间的原始布局方案和改善方案进行评价分析。 相似文献
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通过对变压器生产车间布局及物流现状进行分析,画出了车间现场布局图以及车间物流距离图.并找出了其中存在的问题。根据问题并结合实际情况.对车间布局和物料搬运系统进行了改进设计,使其达到了减少物流倒流、搬运交叉,提高搬运效率、降低工作人员劳动强度和搬运成本的目的。 相似文献
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用ROBCAD对机器人焊接纵梁总成系统建模和仿真。对人工焊接生产线重新进行工艺规划和生产线布局,为机器人、焊枪、夹具、输送装置、纵梁等关键装备、部件及生产线布局建立仿真模型,在模型中进行焊点可达性测试和机器人干涉分析。通过观察仿真过程可判断机器人焊接纵梁总成系统运行正常,仿真可提高改造项目的设计效率和设计质量,降低改造项目的实施难度和实施周期。仿真结果表明,机器人焊接的生产节拍比人工焊接降低23.03%,从产品质量、车间物流、生产管理方面论证了机器人焊接相对于人工焊接的优越性。 相似文献
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针对车间布局设计中提出的提高生产效率、优化生产物流的要求,提出改进式车间布局设计方法。使用SLP方法对车间各作业单元进行划分,量化各作业单元之间的物流关系及非物流关系,通过设定重要性比例确定作业单元间综合相互关系,并得出车间布局方案群。通过设定Witness仿真参数,对初选方案生产物流运行状况进行动态模拟,通过车间物流量及路径拥塞率的对比得出方案优选结果。 相似文献
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基于离散事件仿真技术(DES),对某装配生产线开展了基于仿真的布局设计及优化研究工作,建立该仿真系统的目的是在现有制造模式的基础上,进行不同类型的生产线布局仿真设计试验,提出了一个装配生产线布局解决方案,减少生产线劳动力需求,解决生产瓶颈问题。在分析典型制造零件的制造工艺和生产线现有设备的基础上,提出了直线型布局、U型布局和平行U型布局装配生产线3种布局设计方案。在Witness软件平台上,利用装配生产线数据及经验数据,构建了基于DES的仿真系统。随后,在仿真系统中对这3种布局方式均进行了测试,通过结果对比对3种布局方案在生产线节拍平衡、制造成本和生产效率方面的仿真结果进行分析。结果表明,平行U型布局装配生产线方案是该装配生产线最佳的布局模式。 相似文献
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Clarence W.DE SILVA 《Instrumentation》2019,(4):72-84
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... 相似文献
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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. 相似文献
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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。 相似文献
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The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci... 相似文献
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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。 相似文献
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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。 相似文献
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交通荷载作用下桥梁结构参数识别方法 总被引:2,自引:1,他引:1
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. 相似文献
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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. 相似文献
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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. 相似文献
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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... 相似文献