共查询到20条相似文献,搜索用时 187 毫秒
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基于神经网络专家系统的货船配载系统的设计与实现 总被引:2,自引:0,他引:2
人工神经网络和专家系统都有各自的长处和短处,而二者结合可以取长补短,考虑到人与混全智能系统中的重要作用,提出了把ANN,ES和人的因素集成起来的思想。在分析某公司水运码头货物配载的基础上,探讨了神经网络专家系统在货船配载系统中的应用。 相似文献
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目前我国有关交通主管部门对公路货运配载工作正在采取措施,要加强 宏观控制,积极引导,才能推动这项工作不断地健康发展,本文主要论述了汽车零担货物的配载。 相似文献
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通过对散货船配载系统的发展历史和现状的研究,结合当前人工智能技术的发展,提出散货船自动配载系统的设计思路及散货船配载专家系统的设计方案,为散货船自动配载系统的开发提供理论基础. 相似文献
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为取得公路货运网络的规模经济,提出采用共同配送模式来优化公路货运网络。针对已有运输网络设计模型中对运费函数和路径选择分析的不足,提出包含分段费用函数和最短运输路径选择的公路货运枢纽网络设计模型。通过实例计算,采用共同配送模式的公路货运网络中的货物周转量比采用传统的"点-点"网络模式中的货物周转量增加38.07%;而前者的干线公路运输费用却比后者下降了26.48%。结果表明,采用共同配送模式有利于实现公路货运网络的规模经济,文中提出的运输网络设计模型能较好用于公路货运网络优化中。 相似文献
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结合营口市货运市场的实际,介绍了营口市道路货运业的现状、基本特点及存在的主要问题,提出了道路货运业的发展思路:优化货运运力结构;大力发展配载信息服务;引导运输企业向物流企业过渡;积极发展快速货运业。 相似文献
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基于转速感应的液压旋挖钻机功率匹配模糊控制 总被引:3,自引:0,他引:3
基于液压旋挖钻机负荷多变条件下的节能降耗要求,提出转速感应控制的负荷极限控制匹配方法。利用负荷变化引起的转速偏差的检测反馈,调节变量泵的排量,改变泵的吸收扭矩,控制发动机输出转速工作在能耗较低的转速范围,实现发动机与变量泵间的功率匹配;通过模糊自适应在线自整定调节PID参数,优化变量泵在不同工况下的变量调节性能,提高系统对负荷变化的适应性,实现发动机-变量泵系统的最佳效率匹配。经过在液压旋挖钻机平台上的试验论证,该方法达到了优化的目的,功率匹配效果显著。 相似文献
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G.I. Bogomaz O.M. Markova Yu.G. Chernomashentseva 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1998,30(3):285-294
Dynamics and loading of railway tank cars transporting liquid cargo are investigated. The approach based on the mechanical-pendulum analogy for the liquid cargo mobility simulation is proposed. Hydrodynamic parameters of the mechanical analogy are determined using the solution of the boundary-value problem for the liquid cargo vibrations in a cavity with the tank boiler shape. The fitting of the developed mathematical models is proved by comparison of calculated results and test data. Vibration characteristics and loading of tank-cars under their shunt collisions and motion along straight and curved track in trains are evaluated. It is shown that as a rule the liquid cargo mobility has an essential influence on tank dynamic properties. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(3-4):285-294
SUMMARY Dynamics and loading of railway tank cars transporting liquid cargo are investigated. The approach based on the mechanical-pendulum analogy for the liquid cargo mobility simulation is proposed. Hydrodynamic parameters of the mechanical analogy are determined using the solution of the boundary-value problem for the liquid cargo vibrations in a cavity with the tank boiler shape. The fitting of the developed mathematical models is proved by comparison of calculated results and test data. Vibration characteristics and loading of tank-cars under their shunt collisions and motion along straight and curved track in trains are evaluated. It is shown that as a rule the liquid cargo mobility has an essential influence on tank dynamic properties. 相似文献
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隧道开挖多采用钻爆法,可以分段开挖,加快工程进度,与全断面法(使用TBM时)相比施工成本低。钻爆法出渣作业中需要使用高效的挖装机。通过对隧道挖装机双动力的匹配技术、工作装置的有限元分析技术、负荷传感液压系统技术、电控风扇冷却系统技术、电控系统技术等进行研究,完成样机试制,经工业性使用试验,表明产品达到了国内领先水平。 相似文献
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装载机负荷传感转向液压系统 总被引:1,自引:0,他引:1
轮式装载机液压系统中的转向泵在发动机高速状态时的损失是比较大的。液压系统的损失使得液压油的温度升高,从而带来一系列不利影响。通过分析计算和实机试验,对比了负荷传感转向液压系统与常规转向液压系统的损失,显示负荷传感转向液压系统具有较大优势,试验也证明了其液压油温的降低十分明显。 相似文献
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货车车架的等效载荷简化 总被引:23,自引:2,他引:23
为了探讨货车的货箱和车架荷的简化问题,设计和制作箱-车架模拟试验装置,通过试验证明了货箱和车架之间的相互作用力是以集中力形式传递的,并且货箱的结构形式对车架的受力有显著影响,为了进一步验证模拟试验的结论,等效载荷的简化模型是可行的,实际车架结构的应力计算也进一步支持了货箱-车架模拟试验的结论。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2):121-133
This paper uses simulation to investigate how vehicle loading conditions (driver only, passengers, cargo, and fuel) affect power steering system and overall vehicle dynamics. Our purpose of the study was to evaluate the power steering system model for possible use in the National Advanced Driving Simulator (NADS). The effects of changing loading conditions on inertial properties of passenger cars have been found experimentally using a Vehicle Inertia Measurement Facility (VIMF). This paper presents simulation results using a vehicle handling model combined with a power steering system model and a nonlinear tire model. A crucial part of this project was the adjustment of certain parameters of Pacejka's tire model in order to match simulation results with experimental measurements of vehicle and power steering variables in transient maneuvers. 相似文献
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在对既有钢筋混凝土拱桥进行有限元分析的基础上,在满足荷载试验效率的前提下,首先确定荷载试验工况、车辆荷载及布置、试验分级及测试项目等关键内容,然后对其进行现场荷载试验。通过现场加载试验来对其承载能力进行评定,进一步明确钢筋混凝土拱桥荷载试验的步骤和重点。 相似文献
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Simulation of Vehicle and Power Steering Dynamics Using Tire Model Parameters Matched to Whole Vehicle Experimental Results 总被引:3,自引:0,他引:3
Bongchoon Jang Dean Karnopp 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2000,33(2):121-133
This paper uses simulation to investigate how vehicle loading conditions (driver only, passengers, cargo, and fuel) affect power steering system and overall vehicle dynamics. Our purpose of the study was to evaluate the power steering system model for possible use in the National Advanced Driving Simulator (NADS). The effects of changing loading conditions on inertial properties of passenger cars have been found experimentally using a Vehicle Inertia Measurement Facility (VIMF). This paper presents simulation results using a vehicle handling model combined with a power steering system model and a nonlinear tire model. A crucial part of this project was the adjustment of certain parameters of Pacejka's tire model in order to match simulation results with experimental measurements of vehicle and power steering variables in transient maneuvers. 相似文献