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基于ECRS原则与工序重组的电机装配线产线平衡改善 总被引:2,自引:0,他引:2
针对某电机装配流水线的作业流程与平衡状况,在分析机械工艺基础上,采用人机联合作业分析方法和ECRS原则,结合作业要素重组,应用eM-plant仿真软件,对制约流水线生产能力的瓶颈工位和能力过剩工位进行分析与改进,结合系统观与层次化思想,从宏观到微观、逐步推进、分层次地对装配流水线进行分析研究;同时引入AGV系统对物流路径和布局进行优化,设计出新的流水线方案,实现人均产能翻番、瓶颈时间由28s减少到10.5s、线平衡率提高36.95%。 相似文献
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首先分析阐述了混合装配流水线的平衡问题和排序问题对优化目标的交叉影响,并应用改进的并行优化算法,将其与传统的串行优化算法进行比较分析,分析结果表明,改进的协同优化算法能够克服串行优化算法全局搜索能力弱的局限性,达到全局最优化,从而改善了优化结果。 相似文献
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混合装配流水线上最小装配时间的协同优化 总被引:3,自引:2,他引:1
首先分析阐述了混合装配流水线的平衡问题和排序问题对优化目标的交叉影响,并应用改进的并行优化算法,将其与传统的串行优化算法进行比较分析,分析结果表明,改进的协同优化算法能够克服串行优化算法全局搜索能力弱的局限性,达到全局最优化,从而改善了优化结果. 相似文献
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根据广州市珠江新城旅客自动运输系统(APM)列车的运行特点,介绍APM列车制动系统的制动方式及其特点,分析APM列车动态制动和摩擦制动的工作机理及其区别和联系,阐明APM列车制动系统的电控制过程和气控制过程,从而为APM列车制动系统的维护和管理提供一定的依据. 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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依据JJG880-2006浊度计检定规程,介绍了浊度计示值误差测量结果不确定度的评定方法,对配制标准溶液所使用的玻璃量器所引入的不确定度分量进行了分析和评定。 相似文献
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所谓现代化的电梯是指电梯无论在结构上还是在特性、功能上都要满足人们对电梯提出的越来越高的要求 ,这其中包括①电梯的结构———采用先进的制造工艺及控制技术 ,使电梯的结构越来越紧凑、精巧、坚固、美观及实用 ;②电梯的运行性能———采用先进的自动控制理论、先进的传动与控制技术 ,使电梯在运行过程中具有安全可靠、快速、准确、平稳的特性 ,即使电梯具有良好的乘坐舒适感。而电梯运行过程中的振动 ,则是影响电梯乘坐舒适感的“痼疾”之一 ,影响电梯运行振动的因素很多 ,其中一个因素就是隔振垫的设计。本文将以某大厦一部电梯为例… 相似文献
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《Mechanism and Machine Theory》1991,26(7):697-709
A method of determining polyhedrons of positioning accuracy of mechanical manipulators is developed. Practical significance of the method is illustrated by numerical examples. Polyhedrons of positioning accuracy for a manipulator of 6-R type are calculated for several positions. 相似文献
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A new method of decomposition of the interval of the values of random variables based on results of optimization of the nonparametric estimate of the probability density of the Rosenblatt-Parzen type is proposed. Its application in the problem of testing the hypothesis of identity of the distribution laws of two sequences of one-dimensional random variables is considered. 相似文献
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对多级离心泵噪声检测的不确定度进行了评定,涉及不确定度的来源及分析,A类、B类标准不确定度的评定,合成标准不确定度的评定,以及扩展不确定度的评定和噪声检测结果的报告等. 相似文献